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-industry-pattern/array_ptr_single_elem_init-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:36:25,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:36:25,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:36:25,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:36:25,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:36:25,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:36:25,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:36:25,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:36:25,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:36:25,319 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:36:25,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:36:25,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:36:25,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:36:25,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:36:25,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:36:25,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:36:25,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:36:25,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:36:25,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:36:25,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:36:25,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:36:25,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:36:25,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:36:25,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:36:25,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:36:25,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:36:25,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:36:25,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:36:25,346 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 01:36:25,365 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:36:25,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:36:25,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:36:25,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:36:25,366 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:36:25,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:36:25,367 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:36:25,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:36:25,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:36:25,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:36:25,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:36:25,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:36:25,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:36:25,370 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:36:25,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:36:25,370 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:36:25,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:36:25,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:36:25,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:36:25,371 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:36:25,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:36:25,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:36:25,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:36:25,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:36:25,372 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:36:25,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:36:25,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:36:25,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:36:25,373 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 01:36:25,683 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:36:25,696 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:36:25,699 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:36:25,701 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:36:25,702 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:36:25,702 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i [2019-10-15 01:36:25,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c51f548fa/f2d1f70aade2463283fe6f9ca0487c3b/FLAGa5ec48e47 [2019-10-15 01:36:26,206 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:36:26,207 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i [2019-10-15 01:36:26,214 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c51f548fa/f2d1f70aade2463283fe6f9ca0487c3b/FLAGa5ec48e47 [2019-10-15 01:36:26,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c51f548fa/f2d1f70aade2463283fe6f9ca0487c3b [2019-10-15 01:36:26,607 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:36:26,609 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:36:26,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:36:26,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:36:26,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:36:26,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:36:26" (1/1) ... [2019-10-15 01:36:26,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e9b8ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:26, skipping insertion in model container [2019-10-15 01:36:26,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:36:26" (1/1) ... [2019-10-15 01:36:26,627 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:36:26,645 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:36:26,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:36:26,852 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:36:26,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:36:26,898 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:36:26,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:26 WrapperNode [2019-10-15 01:36:26,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:36:26,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:36:26,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:36:26,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:36:27,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:26" (1/1) ... [2019-10-15 01:36:27,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:26" (1/1) ... [2019-10-15 01:36:27,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:26" (1/1) ... [2019-10-15 01:36:27,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:26" (1/1) ... [2019-10-15 01:36:27,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:26" (1/1) ... [2019-10-15 01:36:27,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:26" (1/1) ... [2019-10-15 01:36:27,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:26" (1/1) ... [2019-10-15 01:36:27,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:36:27,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:36:27,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:36:27,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:36:27,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:26" (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 01:36:27,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:36:27,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:36:27,093 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:36:27,093 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:36:27,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:36:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:36:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:36:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:36:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:36:27,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:36:27,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:36:27,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:36:27,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:36:27,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:36:27,549 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:36:27,549 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 01:36:27,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:36:27 BoogieIcfgContainer [2019-10-15 01:36:27,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:36:27,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:36:27,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:36:27,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:36:27,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:36:26" (1/3) ... [2019-10-15 01:36:27,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52e8be4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:36:27, skipping insertion in model container [2019-10-15 01:36:27,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:26" (2/3) ... [2019-10-15 01:36:27,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52e8be4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:36:27, skipping insertion in model container [2019-10-15 01:36:27,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:36:27" (3/3) ... [2019-10-15 01:36:27,558 INFO L109 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-2.i [2019-10-15 01:36:27,567 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:36:27,575 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:36:27,586 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:36:27,611 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:36:27,611 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:36:27,611 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:36:27,611 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:36:27,611 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:36:27,612 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:36:27,612 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:36:27,612 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:36:27,629 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-15 01:36:27,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:36:27,634 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:27,635 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:27,637 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:27,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:27,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1264123479, now seen corresponding path program 1 times [2019-10-15 01:36:27,649 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:27,650 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752017199] [2019-10-15 01:36:27,650 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:27,650 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:27,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:27,812 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 01:36:27,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752017199] [2019-10-15 01:36:27,814 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:36:27,814 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:36:27,815 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093264628] [2019-10-15 01:36:27,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:36:27,819 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:27,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:36:27,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:36:27,833 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-10-15 01:36:27,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:27,916 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-10-15 01:36:27,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:36:27,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:36:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:27,926 INFO L225 Difference]: With dead ends: 38 [2019-10-15 01:36:27,926 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:36:27,930 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 01:36:27,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:36:27,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-10-15 01:36:27,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:36:27,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-15 01:36:27,976 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2019-10-15 01:36:27,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:27,976 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-15 01:36:27,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:36:27,977 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-15 01:36:27,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:36:27,978 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:27,978 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:27,978 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:27,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:27,979 INFO L82 PathProgramCache]: Analyzing trace with hash -392956526, now seen corresponding path program 1 times [2019-10-15 01:36:27,979 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:27,980 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061223229] [2019-10-15 01:36:27,980 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:27,980 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:27,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:28,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:36:28,062 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061223229] [2019-10-15 01:36:28,062 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110672220] [2019-10-15 01:36:28,063 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 01:36:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:28,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:36:28,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:36:28,199 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:36:28,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [683692563] [2019-10-15 01:36:28,262 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:36:28,262 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:28,269 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:28,277 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:28,277 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:28,453 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:28,636 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:28,649 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:28,771 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:28,917 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:28,970 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:28,989 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:29,008 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:29,025 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:29,040 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:29,058 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:29,172 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 144 [2019-10-15 01:36:29,189 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:29,206 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:29,281 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:29,294 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:29,310 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:29,325 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:29,398 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:29,520 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:29,807 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:29,821 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:29,856 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:29,903 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:29,942 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:30,004 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:30,521 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:36:30,534 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:30,540 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:31,163 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:31,163 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:36:31,164 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439432973] [2019-10-15 01:36:31,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:36:31,167 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:31,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:36:31,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:36:31,171 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 18 states. [2019-10-15 01:36:32,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:32,146 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-10-15 01:36:32,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:36:32,148 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 16 [2019-10-15 01:36:32,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:32,149 INFO L225 Difference]: With dead ends: 44 [2019-10-15 01:36:32,149 INFO L226 Difference]: Without dead ends: 31 [2019-10-15 01:36:32,151 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2019-10-15 01:36:32,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-15 01:36:32,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2019-10-15 01:36:32,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-15 01:36:32,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-10-15 01:36:32,165 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 16 [2019-10-15 01:36:32,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:32,166 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-10-15 01:36:32,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:36:32,166 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-10-15 01:36:32,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-15 01:36:32,167 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:32,167 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:32,373 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:32,373 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:32,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:32,374 INFO L82 PathProgramCache]: Analyzing trace with hash -127994615, now seen corresponding path program 2 times [2019-10-15 01:36:32,375 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:32,376 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677895784] [2019-10-15 01:36:32,376 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:32,377 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:32,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:32,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:36:32,532 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677895784] [2019-10-15 01:36:32,532 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300610447] [2019-10-15 01:36:32,533 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 01:36:32,606 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:36:32,607 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:32,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:36:32,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:32,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:36:32,652 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:36:32,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1645118121] [2019-10-15 01:36:32,712 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:36:32,712 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:32,713 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:32,713 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:32,713 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:32,753 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:32,797 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:32,844 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:32,853 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:32,950 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:32,966 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,001 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,013 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,027 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,041 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,053 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,134 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,148 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,182 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,214 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,224 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,238 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,282 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,345 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,570 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,577 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,601 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,627 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,650 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:33,819 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:34,016 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:36:34,023 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:34,027 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:34,626 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:34,626 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7, 11] total 24 [2019-10-15 01:36:34,626 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550607970] [2019-10-15 01:36:34,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 01:36:34,628 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:34,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 01:36:34,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:36:34,629 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 24 states. [2019-10-15 01:36:36,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:36,317 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2019-10-15 01:36:36,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:36:36,318 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 22 [2019-10-15 01:36:36,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:36,321 INFO L225 Difference]: With dead ends: 71 [2019-10-15 01:36:36,321 INFO L226 Difference]: Without dead ends: 55 [2019-10-15 01:36:36,322 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=364, Invalid=1276, Unknown=0, NotChecked=0, Total=1640 [2019-10-15 01:36:36,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-15 01:36:36,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2019-10-15 01:36:36,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-15 01:36:36,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-10-15 01:36:36,333 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 22 [2019-10-15 01:36:36,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:36,334 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-10-15 01:36:36,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 01:36:36,334 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-10-15 01:36:36,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-15 01:36:36,335 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:36,335 INFO L380 BasicCegarLoop]: trace histogram [10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:36,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:36,549 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:36,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:36,549 INFO L82 PathProgramCache]: Analyzing trace with hash 701320466, now seen corresponding path program 3 times [2019-10-15 01:36:36,549 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:36,550 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286408150] [2019-10-15 01:36:36,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:36,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:36,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:36:36,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286408150] [2019-10-15 01:36:36,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628299289] [2019-10-15 01:36:36,713 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 01:36:36,786 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:36:36,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:36,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:36:36,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:36:36,818 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:36:36,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2103710375] [2019-10-15 01:36:36,909 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:36:36,909 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:36,910 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:36,910 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:36,910 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:36,952 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:36,987 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,010 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,019 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,029 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,060 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,069 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,185 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,197 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,213 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,227 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,242 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,256 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,293 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,361 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,374 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,388 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,399 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,434 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,450 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,511 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,595 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,705 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,743 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,765 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,774 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,787 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:37,833 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:38,171 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:36:38,177 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:38,180 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:38,774 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:38,775 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 26 [2019-10-15 01:36:38,775 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035730723] [2019-10-15 01:36:38,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 01:36:38,777 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:38,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 01:36:38,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2019-10-15 01:36:38,778 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 26 states. [2019-10-15 01:36:39,598 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2019-10-15 01:36:40,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:40,720 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2019-10-15 01:36:40,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 01:36:40,721 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 37 [2019-10-15 01:36:40,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:40,725 INFO L225 Difference]: With dead ends: 91 [2019-10-15 01:36:40,725 INFO L226 Difference]: Without dead ends: 66 [2019-10-15 01:36:40,727 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=455, Invalid=1615, Unknown=0, NotChecked=0, Total=2070 [2019-10-15 01:36:40,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-15 01:36:40,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2019-10-15 01:36:40,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-15 01:36:40,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2019-10-15 01:36:40,739 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 37 [2019-10-15 01:36:40,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:40,739 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2019-10-15 01:36:40,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 01:36:40,740 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2019-10-15 01:36:40,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-15 01:36:40,741 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:40,741 INFO L380 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:40,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:40,948 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:40,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:40,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1575063017, now seen corresponding path program 4 times [2019-10-15 01:36:40,949 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:40,949 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750622694] [2019-10-15 01:36:40,949 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:40,949 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:40,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:36:41,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750622694] [2019-10-15 01:36:41,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603991447] [2019-10-15 01:36:41,181 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 01:36:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:41,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 01:36:41,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-15 01:36:41,290 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-15 01:36:41,499 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1828844528] [2019-10-15 01:36:41,501 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:36:41,501 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:41,501 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:41,502 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:41,502 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:41,521 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:41,561 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:41,569 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:41,619 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:41,627 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:41,638 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:41,644 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:41,736 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:41,748 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:41,760 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:41,777 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:41,805 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:41,825 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:41,891 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:41,905 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:41,921 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:41,933 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:41,951 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:41,986 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:42,003 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:42,106 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:42,185 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:42,273 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:42,278 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:42,286 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:42,312 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:42,320 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:42,483 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 01:36:42,648 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:36:42,657 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:42,660 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:43,018 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2019-10-15 01:36:43,420 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:43,420 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 40 [2019-10-15 01:36:43,421 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101057463] [2019-10-15 01:36:43,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-15 01:36:43,422 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:43,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-15 01:36:43,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1108, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:36:43,424 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 40 states. [2019-10-15 01:36:47,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:47,199 INFO L93 Difference]: Finished difference Result 165 states and 195 transitions. [2019-10-15 01:36:47,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-15 01:36:47,203 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 60 [2019-10-15 01:36:47,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:47,204 INFO L225 Difference]: With dead ends: 165 [2019-10-15 01:36:47,204 INFO L226 Difference]: Without dead ends: 119 [2019-10-15 01:36:47,207 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 170 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1420, Invalid=3836, Unknown=0, NotChecked=0, Total=5256 [2019-10-15 01:36:47,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-10-15 01:36:47,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 81. [2019-10-15 01:36:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-15 01:36:47,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2019-10-15 01:36:47,229 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 60 [2019-10-15 01:36:47,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:47,229 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2019-10-15 01:36:47,229 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-15 01:36:47,229 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2019-10-15 01:36:47,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-15 01:36:47,231 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:47,232 INFO L380 BasicCegarLoop]: trace histogram [26, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:47,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:47,435 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:47,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:47,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1748959122, now seen corresponding path program 5 times [2019-10-15 01:36:47,436 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:47,436 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931915567] [2019-10-15 01:36:47,437 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:47,437 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:47,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-10-15 01:36:47,766 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931915567] [2019-10-15 01:36:47,766 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955960753] [2019-10-15 01:36:47,766 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