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/reducercommutativity/avg40-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:24:31,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:24:31,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:24:31,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:24:31,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:24:31,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:24:31,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:24:31,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:24:31,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:24:31,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:24:31,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:24:31,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:24:31,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:24:31,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:24:31,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:24:31,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:24:31,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:24:31,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:24:31,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:24:31,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:24:31,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:24:31,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:24:31,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:24:31,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:24:31,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:24:31,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:24:31,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:24:31,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:24:31,654 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 03:24:31,677 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:24:31,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:24:31,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:24:31,679 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:24:31,679 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:24:31,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:24:31,679 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:24:31,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:24:31,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:24:31,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:24:31,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:24:31,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:24:31,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:24:31,681 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:24:31,681 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:24:31,681 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:24:31,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:24:31,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:24:31,682 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:24:31,682 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:24:31,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:24:31,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:24:31,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:24:31,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:24:31,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:24:31,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:24:31,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:24:31,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:24:31,684 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 03:24:32,015 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:24:32,027 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:24:32,031 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:24:32,032 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:24:32,032 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:24:32,033 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/avg40-2.i [2019-10-15 03:24:32,095 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c4705fe8/de459960104942b98e8115357b485361/FLAGdc39ce574 [2019-10-15 03:24:32,540 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:24:32,541 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg40-2.i [2019-10-15 03:24:32,550 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c4705fe8/de459960104942b98e8115357b485361/FLAGdc39ce574 [2019-10-15 03:24:32,941 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c4705fe8/de459960104942b98e8115357b485361 [2019-10-15 03:24:32,951 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:24:32,953 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:24:32,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:24:32,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:24:32,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:24:32,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:24:32" (1/1) ... [2019-10-15 03:24:32,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6581bd7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:32, skipping insertion in model container [2019-10-15 03:24:32,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:24:32" (1/1) ... [2019-10-15 03:24:32,969 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:24:32,987 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:24:33,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:24:33,192 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:24:33,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:24:33,307 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:24:33,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:33 WrapperNode [2019-10-15 03:24:33,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:24:33,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:24:33,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:24:33,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:24:33,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:33" (1/1) ... [2019-10-15 03:24:33,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:33" (1/1) ... [2019-10-15 03:24:33,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:33" (1/1) ... [2019-10-15 03:24:33,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:33" (1/1) ... [2019-10-15 03:24:33,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:33" (1/1) ... [2019-10-15 03:24:33,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:33" (1/1) ... [2019-10-15 03:24:33,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:33" (1/1) ... [2019-10-15 03:24:33,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:24:33,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:24:33,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:24:33,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:24:33,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:33" (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 03:24:33,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:24:33,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:24:33,414 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2019-10-15 03:24:33,414 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:24:33,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:24:33,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:24:33,415 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2019-10-15 03:24:33,415 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:24:33,415 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:24:33,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:24:33,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:24:33,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:24:33,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:24:33,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:24:33,797 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:24:33,797 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 03:24:33,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:24:33 BoogieIcfgContainer [2019-10-15 03:24:33,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:24:33,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:24:33,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:24:33,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:24:33,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:24:32" (1/3) ... [2019-10-15 03:24:33,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bd91506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:24:33, skipping insertion in model container [2019-10-15 03:24:33,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:33" (2/3) ... [2019-10-15 03:24:33,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bd91506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:24:33, skipping insertion in model container [2019-10-15 03:24:33,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:24:33" (3/3) ... [2019-10-15 03:24:33,807 INFO L109 eAbstractionObserver]: Analyzing ICFG avg40-2.i [2019-10-15 03:24:33,817 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:24:33,825 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:24:33,835 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:24:33,857 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:24:33,857 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:24:33,857 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:24:33,857 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:24:33,857 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:24:33,858 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:24:33,858 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:24:33,858 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:24:33,872 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 03:24:33,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 03:24:33,878 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:33,878 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:24:33,880 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:33,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:33,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2112018211, now seen corresponding path program 1 times [2019-10-15 03:24:33,892 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:33,893 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670156048] [2019-10-15 03:24:33,894 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:33,894 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:33,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 03:24:34,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670156048] [2019-10-15 03:24:34,096 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:24:34,096 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:24:34,096 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193032274] [2019-10-15 03:24:34,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:24:34,105 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:34,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:24:34,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:24:34,124 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 03:24:34,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:24:34,159 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-15 03:24:34,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:24:34,161 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-15 03:24:34,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:24:34,171 INFO L225 Difference]: With dead ends: 41 [2019-10-15 03:24:34,171 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 03:24:34,175 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 03:24:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 03:24:34,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 03:24:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 03:24:34,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 03:24:34,216 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-10-15 03:24:34,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:24:34,217 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 03:24:34,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:24:34,217 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 03:24:34,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 03:24:34,219 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:34,220 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:24:34,220 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:34,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:34,221 INFO L82 PathProgramCache]: Analyzing trace with hash -2049651994, now seen corresponding path program 1 times [2019-10-15 03:24:34,221 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:34,222 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022960391] [2019-10-15 03:24:34,222 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:34,222 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:34,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:24:34,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022960391] [2019-10-15 03:24:34,309 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358814272] [2019-10-15 03:24:34,309 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 03:24:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:34,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:24:34,425 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:24:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:24:34,454 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:24:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:24:34,514 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:24:34,515 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-15 03:24:34,515 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343908610] [2019-10-15 03:24:34,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:24:34,517 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:34,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:24:34,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:24:34,518 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 03:24:34,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:24:34,529 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-15 03:24:34,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:24:34,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-15 03:24:34,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:24:34,531 INFO L225 Difference]: With dead ends: 33 [2019-10-15 03:24:34,531 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 03:24:34,532 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:24:34,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 03:24:34,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 03:24:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 03:24:34,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 03:24:34,538 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-10-15 03:24:34,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:24:34,539 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 03:24:34,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:24:34,539 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 03:24:34,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 03:24:34,540 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:34,540 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:24:34,743 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:24:34,744 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:34,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:34,745 INFO L82 PathProgramCache]: Analyzing trace with hash -575014574, now seen corresponding path program 1 times [2019-10-15 03:24:34,745 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:34,746 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142270038] [2019-10-15 03:24:34,746 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:34,746 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:34,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:24:34,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142270038] [2019-10-15 03:24:34,874 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:24:34,874 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:24:34,875 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984202189] [2019-10-15 03:24:34,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:24:34,877 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:34,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:24:34,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:24:34,878 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-10-15 03:24:34,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:24:34,892 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 03:24:34,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:24:34,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-15 03:24:34,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:24:34,895 INFO L225 Difference]: With dead ends: 31 [2019-10-15 03:24:34,895 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 03:24:34,896 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 03:24:34,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 03:24:34,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 03:24:34,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 03:24:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-15 03:24:34,905 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-10-15 03:24:34,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:24:34,908 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-15 03:24:34,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:24:34,908 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-15 03:24:34,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 03:24:34,909 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:34,909 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:24:34,910 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:34,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:34,910 INFO L82 PathProgramCache]: Analyzing trace with hash -202958309, now seen corresponding path program 1 times [2019-10-15 03:24:34,911 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:34,911 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702513261] [2019-10-15 03:24:34,911 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:34,911 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:34,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:24:35,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702513261] [2019-10-15 03:24:35,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311587119] [2019-10-15 03:24:35,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 03:24:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:35,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:24:35,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:24:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:24:35,164 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:24:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:24:35,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2025382182] [2019-10-15 03:24:35,254 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:24:35,255 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:24:35,263 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:24:35,273 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:24:35,274 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:24:35,421 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:24:43,201 WARN L160 IndexEqualityManager]: solver failed to check if following equality is implied: (= (select (select |v_#memory_int_43| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4)) main_~temp~0) [2019-10-15 03:24:55,402 INFO L199 IcfgInterpreter]: Interpreting procedure avg with input of size 1 for LOIs [2019-10-15 03:24:55,440 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:24:55,443 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:24:57,730 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:24:57,731 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 03:24:57,731 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116731493] [2019-10-15 03:24:57,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 03:24:57,733 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:57,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 03:24:57,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=225, Unknown=1, NotChecked=0, Total=272 [2019-10-15 03:24:57,735 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 17 states. [2019-10-15 03:25:11,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:11,481 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-10-15 03:25:11,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 03:25:11,481 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2019-10-15 03:25:11,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:11,482 INFO L225 Difference]: With dead ends: 40 [2019-10-15 03:25:11,483 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 03:25:11,484 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=123, Invalid=630, Unknown=3, NotChecked=0, Total=756 [2019-10-15 03:25:11,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 03:25:11,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 03:25:11,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 03:25:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-15 03:25:11,501 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-10-15 03:25:11,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:11,502 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-15 03:25:11,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 03:25:11,502 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-15 03:25:11,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 03:25:11,503 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:11,503 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:11,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:11,704 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:11,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:11,705 INFO L82 PathProgramCache]: Analyzing trace with hash -892290920, now seen corresponding path program 2 times [2019-10-15 03:25:11,705 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:11,706 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837321758] [2019-10-15 03:25:11,706 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:11,706 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:11,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:25:11,790 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837321758] [2019-10-15 03:25:11,790 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985378583] [2019-10-15 03:25:11,791 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 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 03:25:11,864 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 03:25:11,864 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:11,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:11,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 03:25:11,887 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 03:25:11,921 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [900150564] [2019-10-15 03:25:11,924 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:11,924 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:11,925 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:11,925 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:11,925 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:11,946 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs