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_partial_init_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:34:50,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:34:50,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:34:50,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:34:50,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:34:50,844 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:34:50,846 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:34:50,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:34:50,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:34:50,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:34:50,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:34:50,859 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:34:50,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:34:50,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:34:50,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:34:50,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:34:50,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:34:50,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:34:50,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:34:50,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:34:50,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:34:50,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:34:50,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:34:50,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:34:50,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:34:50,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:34:50,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:34:50,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:34:50,885 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 01:34:50,911 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:34:50,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:34:50,913 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:34:50,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:34:50,918 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:34:50,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:34:50,919 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:34:50,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:34:50,919 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:34:50,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:34:50,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:34:50,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:34:50,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:34:50,920 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:34:50,920 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:34:50,921 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:34:50,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:34:50,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:34:50,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:34:50,926 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:34:50,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:34:50,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:34:50,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:34:50,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:34:50,927 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:34:50,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:34:50,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:34:50,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:34:50,928 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 01:34:51,204 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:34:51,216 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:34:51,220 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:34:51,221 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:34:51,221 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:34:51,222 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partial_init_ground.i [2019-10-15 01:34:51,280 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dfa1af4c/592abcd4f66544bdb061b9e1570e1c25/FLAGfa9a6666c [2019-10-15 01:34:51,702 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:34:51,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partial_init_ground.i [2019-10-15 01:34:51,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dfa1af4c/592abcd4f66544bdb061b9e1570e1c25/FLAGfa9a6666c [2019-10-15 01:34:52,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dfa1af4c/592abcd4f66544bdb061b9e1570e1c25 [2019-10-15 01:34:52,107 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:34:52,108 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:34:52,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:52,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:34:52,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:34:52,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:52" (1/1) ... [2019-10-15 01:34:52,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@283ca1de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:52, skipping insertion in model container [2019-10-15 01:34:52,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:52" (1/1) ... [2019-10-15 01:34:52,123 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:34:52,140 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:34:52,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:52,312 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:34:52,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:52,351 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:34:52,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:52 WrapperNode [2019-10-15 01:34:52,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:52,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:34:52,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:34:52,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:34:52,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:52" (1/1) ... [2019-10-15 01:34:52,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:52" (1/1) ... [2019-10-15 01:34:52,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:52" (1/1) ... [2019-10-15 01:34:52,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:52" (1/1) ... [2019-10-15 01:34:52,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:52" (1/1) ... [2019-10-15 01:34:52,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:52" (1/1) ... [2019-10-15 01:34:52,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:52" (1/1) ... [2019-10-15 01:34:52,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:34:52,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:34:52,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:34:52,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:34:52,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:52" (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 01:34:52,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:34:52,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:34:52,552 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:34:52,552 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:34:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:34:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:34:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:34:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:34:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:34:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:34:52,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:34:52,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:34:52,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:34:52,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:34:52,962 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:34:52,962 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-15 01:34:52,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:52 BoogieIcfgContainer [2019-10-15 01:34:52,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:34:52,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:34:52,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:34:52,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:34:52,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:34:52" (1/3) ... [2019-10-15 01:34:52,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13074c73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:52, skipping insertion in model container [2019-10-15 01:34:52,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:52" (2/3) ... [2019-10-15 01:34:52,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13074c73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:52, skipping insertion in model container [2019-10-15 01:34:52,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:52" (3/3) ... [2019-10-15 01:34:52,972 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partial_init_ground.i [2019-10-15 01:34:52,981 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:34:52,988 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:34:53,000 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:34:53,023 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:34:53,024 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:34:53,024 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:34:53,024 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:34:53,024 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:34:53,024 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:34:53,024 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:34:53,025 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:34:53,040 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-15 01:34:53,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:34:53,046 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:53,046 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:53,048 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:53,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:53,052 INFO L82 PathProgramCache]: Analyzing trace with hash -2016740759, now seen corresponding path program 1 times [2019-10-15 01:34:53,059 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:53,059 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765934887] [2019-10-15 01:34:53,059 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:53,060 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:53,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:53,213 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 01:34:53,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765934887] [2019-10-15 01:34:53,215 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:53,215 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:53,215 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305607358] [2019-10-15 01:34:53,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:53,220 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:53,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:53,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:53,237 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2019-10-15 01:34:53,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:53,291 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2019-10-15 01:34:53,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:53,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:34:53,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:53,303 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:34:53,303 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:34:53,307 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 01:34:53,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:34:53,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 01:34:53,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 01:34:53,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 01:34:53,347 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2019-10-15 01:34:53,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:53,348 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 01:34:53,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:53,348 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 01:34:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:34:53,351 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:53,352 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:53,352 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:53,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:53,354 INFO L82 PathProgramCache]: Analyzing trace with hash 826554714, now seen corresponding path program 1 times [2019-10-15 01:34:53,354 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:53,355 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983040626] [2019-10-15 01:34:53,355 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:53,355 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:53,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:34:53,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983040626] [2019-10-15 01:34:53,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800067279] [2019-10-15 01:34:53,462 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 01:34:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:53,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:34:53,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:34:53,564 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:34:53,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1919845566] [2019-10-15 01:34:53,655 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:34:53,658 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:53,666 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:53,672 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:53,672 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:53,812 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:58,603 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:34:58,641 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:58,648 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:58,921 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:58,921 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 01:34:58,921 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453613292] [2019-10-15 01:34:58,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:34:58,924 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:58,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:34:58,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:34:58,925 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 17 states. [2019-10-15 01:34:59,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:59,536 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2019-10-15 01:34:59,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:34:59,537 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2019-10-15 01:34:59,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:59,538 INFO L225 Difference]: With dead ends: 47 [2019-10-15 01:34:59,539 INFO L226 Difference]: Without dead ends: 33 [2019-10-15 01:34:59,540 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:34:59,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-15 01:34:59,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2019-10-15 01:34:59,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-15 01:34:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-15 01:34:59,550 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2019-10-15 01:34:59,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:59,550 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-15 01:34:59,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:34:59,551 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-15 01:34:59,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:34:59,551 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:59,552 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:59,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:59,757 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:59,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:59,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1090629335, now seen corresponding path program 2 times [2019-10-15 01:34:59,757 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:59,758 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062575791] [2019-10-15 01:34:59,758 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:59,758 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:59,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:59,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:59,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062575791] [2019-10-15 01:34:59,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919012715] [2019-10-15 01:34:59,872 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 01:34:59,946 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:34:59,946 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:59,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:34:59,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:59,965 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:35:00,037 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [40898664] [2019-10-15 01:35:00,039 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:00,039 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:00,040 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:00,041 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:00,042 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:00,091 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:02,608 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:35:02,633 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:02,640 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:02,925 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:02,925 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 23 [2019-10-15 01:35:02,926 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766297165] [2019-10-15 01:35:02,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:35:02,927 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:02,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:35:02,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:35:02,929 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 23 states. [2019-10-15 01:35:03,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:03,652 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2019-10-15 01:35:03,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:35:03,653 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 20 [2019-10-15 01:35:03,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:03,654 INFO L225 Difference]: With dead ends: 62 [2019-10-15 01:35:03,654 INFO L226 Difference]: Without dead ends: 45 [2019-10-15 01:35:03,655 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=313, Invalid=1247, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:35:03,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-15 01:35:03,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2019-10-15 01:35:03,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-15 01:35:03,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-10-15 01:35:03,668 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 20 [2019-10-15 01:35:03,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:03,668 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-10-15 01:35:03,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:35:03,668 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-10-15 01:35:03,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:35:03,670 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:03,671 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:03,875 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:03,876 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:03,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:03,876 INFO L82 PathProgramCache]: Analyzing trace with hash -441096375, now seen corresponding path program 3 times [2019-10-15 01:35:03,876 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:03,877 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18636639] [2019-10-15 01:35:03,877 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:03,877 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:03,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:35:04,067 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18636639] [2019-10-15 01:35:04,067 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404405664] [2019-10-15 01:35:04,068 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 01:35:04,157 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:35:04,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:04,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:35:04,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:35:04,191 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:35:04,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1813120960] [2019-10-15 01:35:04,420 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:04,421 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:04,421 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:04,422 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:04,422 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:04,452 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:06,889 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:35:06,900 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:06,903 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:07,227 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:07,228 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 35 [2019-10-15 01:35:07,228 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648357756] [2019-10-15 01:35:07,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:35:07,229 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:07,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:35:07,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:35:07,231 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 35 states. [2019-10-15 01:35:08,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:08,628 INFO L93 Difference]: Finished difference Result 92 states and 126 transitions. [2019-10-15 01:35:08,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:35:08,629 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 32 [2019-10-15 01:35:08,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:08,631 INFO L225 Difference]: With dead ends: 92 [2019-10-15 01:35:08,631 INFO L226 Difference]: Without dead ends: 69 [2019-10-15 01:35:08,634 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=979, Invalid=3053, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:35:08,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-15 01:35:08,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2019-10-15 01:35:08,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-15 01:35:08,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2019-10-15 01:35:08,646 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 32 [2019-10-15 01:35:08,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:08,646 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2019-10-15 01:35:08,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:35:08,646 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2019-10-15 01:35:08,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-15 01:35:08,648 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:08,648 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:08,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:08,857 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:08,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:08,858 INFO L82 PathProgramCache]: Analyzing trace with hash -581051511, now seen corresponding path program 4 times [2019-10-15 01:35:08,858 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:08,858 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189077488] [2019-10-15 01:35:08,858 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:08,858 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:08,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:35:09,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189077488] [2019-10-15 01:35:09,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360469611] [2019-10-15 01:35:09,269 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 01:35:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:09,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:35:09,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:35:09,439 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:35:10,110 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [173226865] [2019-10-15 01:35:10,111 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:10,112 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:10,112 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:10,112 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:10,112 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:10,141 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:10,610 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:35:10,620 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:10,623 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:10,968 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:10,969 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 11] total 59 [2019-10-15 01:35:10,969 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899655490] [2019-10-15 01:35:10,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:35:10,971 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:10,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:35:10,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1206, Invalid=2216, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:35:10,974 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 59 states. [2019-10-15 01:35:14,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:14,103 INFO L93 Difference]: Finished difference Result 152 states and 210 transitions. [2019-10-15 01:35:14,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:35:14,103 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 56 [2019-10-15 01:35:14,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:14,106 INFO L225 Difference]: With dead ends: 152 [2019-10-15 01:35:14,106 INFO L226 Difference]: Without dead ends: 117 [2019-10-15 01:35:14,110 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2755 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3607, Invalid=8825, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:35:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-15 01:35:14,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 111. [2019-10-15 01:35:14,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-15 01:35:14,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2019-10-15 01:35:14,126 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 56 [2019-10-15 01:35:14,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:14,126 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2019-10-15 01:35:14,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:35:14,126 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2019-10-15 01:35:14,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-15 01:35:14,130 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:14,130 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:14,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:14,333 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:14,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:14,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1405084681, now seen corresponding path program 5 times [2019-10-15 01:35:14,334 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:14,335 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443658613] [2019-10-15 01:35:14,335 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:14,335 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:14,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:14,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-10-15 01:35:15,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443658613] [2019-10-15 01:35:15,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128023439] [2019-10-15 01:35:15,383 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