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/sep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 15:25:53,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 15:25:53,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 15:25:53,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 15:25:53,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 15:25:53,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 15:25:53,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 15:25:53,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 15:25:53,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 15:25:53,732 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 15:25:53,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 15:25:53,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 15:25:53,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 15:25:53,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 15:25:53,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 15:25:53,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 15:25:53,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 15:25:53,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 15:25:53,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 15:25:53,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 15:25:53,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 15:25:53,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 15:25:53,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 15:25:53,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 15:25:53,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 15:25:53,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 15:25:53,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 15:25:53,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 15:25:53,772 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 [2019-10-07 15:25:53,800 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 15:25:53,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 15:25:53,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 15:25:53,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 15:25:53,803 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 15:25:53,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 15:25:53,803 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 15:25:53,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 15:25:53,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 15:25:53,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 15:25:53,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 15:25:53,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 15:25:53,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 15:25:53,806 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 15:25:53,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 15:25:53,807 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 15:25:53,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 15:25:53,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 15:25:53,807 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 15:25:53,808 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 15:25:53,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 15:25:53,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 15:25:53,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 15:25:53,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 15:25:53,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 15:25:53,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 15:25:53,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 15:25:53,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 15:25:53,813 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 [2019-10-07 15:25:54,073 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 15:25:54,086 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 15:25:54,089 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 15:25:54,091 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 15:25:54,091 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 15:25:54,092 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep.i [2019-10-07 15:25:54,155 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b09d3b4c5/8b4c0762f6a941eb8e0be12e06bea4a3/FLAG64ddb5e56 [2019-10-07 15:25:54,578 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 15:25:54,580 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep.i [2019-10-07 15:25:54,586 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b09d3b4c5/8b4c0762f6a941eb8e0be12e06bea4a3/FLAG64ddb5e56 [2019-10-07 15:25:54,967 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b09d3b4c5/8b4c0762f6a941eb8e0be12e06bea4a3 [2019-10-07 15:25:54,976 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 15:25:54,978 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 15:25:54,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 15:25:54,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 15:25:54,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 15:25:54,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:25:54" (1/1) ... [2019-10-07 15:25:54,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e2a3789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:25:54, skipping insertion in model container [2019-10-07 15:25:54,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:25:54" (1/1) ... [2019-10-07 15:25:54,994 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 15:25:55,012 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 15:25:55,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 15:25:55,240 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 15:25:55,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 15:25:55,284 INFO L192 MainTranslator]: Completed translation [2019-10-07 15:25:55,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:25:55 WrapperNode [2019-10-07 15:25:55,285 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 15:25:55,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 15:25:55,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 15:25:55,285 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 15:25:55,381 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:25:55" (1/1) ... [2019-10-07 15:25:55,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:25:55" (1/1) ... [2019-10-07 15:25:55,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:25:55" (1/1) ... [2019-10-07 15:25:55,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:25:55" (1/1) ... [2019-10-07 15:25:55,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:25:55" (1/1) ... [2019-10-07 15:25:55,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:25:55" (1/1) ... [2019-10-07 15:25:55,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:25:55" (1/1) ... [2019-10-07 15:25:55,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 15:25:55,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 15:25:55,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 15:25:55,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 15:25:55,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:25:55" (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 [2019-10-07 15:25:55,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 15:25:55,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 15:25:55,481 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-10-07 15:25:55,481 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 15:25:55,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 15:25:55,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 15:25:55,482 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-10-07 15:25:55,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-07 15:25:55,482 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 15:25:55,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-07 15:25:55,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-07 15:25:55,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-07 15:25:55,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 15:25:55,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 15:25:55,901 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 15:25:55,901 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-07 15:25:55,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:25:55 BoogieIcfgContainer [2019-10-07 15:25:55,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 15:25:55,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 15:25:55,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 15:25:55,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 15:25:55,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 03:25:54" (1/3) ... [2019-10-07 15:25:55,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2501d3ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:25:55, skipping insertion in model container [2019-10-07 15:25:55,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:25:55" (2/3) ... [2019-10-07 15:25:55,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2501d3ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:25:55, skipping insertion in model container [2019-10-07 15:25:55,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:25:55" (3/3) ... [2019-10-07 15:25:55,910 INFO L109 eAbstractionObserver]: Analyzing ICFG sep.i [2019-10-07 15:25:55,919 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 15:25:55,927 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 15:25:55,939 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 15:25:55,961 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 15:25:55,961 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 15:25:55,961 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 15:25:55,961 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 15:25:55,961 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 15:25:55,962 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 15:25:55,962 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 15:25:55,962 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 15:25:55,978 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-07 15:25:55,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-07 15:25:55,983 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 15:25:55,984 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 15:25:55,985 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 15:25:55,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 15:25:55,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1047241446, now seen corresponding path program 1 times [2019-10-07 15:25:55,996 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 15:25:55,996 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 15:25:55,997 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 15:25:55,997 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 15:25:55,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 15:25:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 15:25:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-07 15:25:56,235 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 15:25:56,236 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 15:25:56,236 INFO L95 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 [2019-10-07 15:25:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 15:25:56,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 15:25:56,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 15:25:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-07 15:25:56,375 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 15:25:56,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-07 15:25:56,456 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 15:25:56,456 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2019-10-07 15:25:56,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 15:25:56,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 15:25:56,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-07 15:25:56,479 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2019-10-07 15:25:56,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 15:25:56,571 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2019-10-07 15:25:56,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 15:25:56,573 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2019-10-07 15:25:56,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 15:25:56,582 INFO L225 Difference]: With dead ends: 46 [2019-10-07 15:25:56,582 INFO L226 Difference]: Without dead ends: 20 [2019-10-07 15:25:56,585 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-07 15:25:56,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-07 15:25:56,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-07 15:25:56,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-07 15:25:56,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-10-07 15:25:56,627 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 24 [2019-10-07 15:25:56,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 15:25:56,628 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-10-07 15:25:56,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 15:25:56,628 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-10-07 15:25:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-07 15:25:56,630 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 15:25:56,630 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 15:25:56,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 15:25:56,842 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 15:25:56,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 15:25:56,844 INFO L82 PathProgramCache]: Analyzing trace with hash 173985662, now seen corresponding path program 1 times [2019-10-07 15:25:56,844 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 15:25:56,844 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 15:25:56,845 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 15:25:56,845 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 15:25:56,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 15:25:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 15:25:57,016 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-07 15:25:57,016 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 15:25:57,017 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 15:25:57,017 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 15:25:57,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 15:25:57,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 15:25:57,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 15:25:57,019 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2019-10-07 15:25:57,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 15:25:57,066 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-07 15:25:57,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 15:25:57,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-07 15:25:57,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 15:25:57,068 INFO L225 Difference]: With dead ends: 30 [2019-10-07 15:25:57,069 INFO L226 Difference]: Without dead ends: 21 [2019-10-07 15:25:57,070 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 15:25:57,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-07 15:25:57,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-07 15:25:57,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-07 15:25:57,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-10-07 15:25:57,076 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 27 [2019-10-07 15:25:57,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 15:25:57,078 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-10-07 15:25:57,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 15:25:57,079 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-10-07 15:25:57,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-07 15:25:57,080 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 15:25:57,080 INFO L385 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] [2019-10-07 15:25:57,081 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 15:25:57,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 15:25:57,081 INFO L82 PathProgramCache]: Analyzing trace with hash 2000481489, now seen corresponding path program 1 times [2019-10-07 15:25:57,081 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 15:25:57,081 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 15:25:57,082 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 15:25:57,082 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 15:25:57,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 15:25:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 15:25:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-07 15:25:57,186 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 15:25:57,186 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 15:25:57,186 INFO L95 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 [2019-10-07 15:25:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 15:25:57,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 15:25:57,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 15:25:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-07 15:25:57,295 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 15:25:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-07 15:25:57,399 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 15:25:57,433 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-07 15:25:57,433 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 15:25:57,440 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 15:25:57,448 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 15:25:57,449 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 15:25:57,601 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-07 15:25:59,678 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-07 15:25:59,733 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-07 15:25:59,738 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-07 15:25:59,738 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-07 15:25:59,739 INFO L193 IcfgInterpreter]: Reachable states at location L33 satisfy 571#(or (exists ((v_prenex_2 Int) (v_prenex_1 Int) (v_sep_~ret~0_BEFORE_RETURN_2 Int) (v_sep_~ret~0_BEFORE_RETURN_1 Int)) (or (and (= 0 |#NULL.base|) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (= (store |old(#memory_int)| |main_~#x~0.base| (store (store (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset| (select (select |old(#memory_int)| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (+ |main_~#x~0.offset| 4) main_~temp~0)) |#memory_int|) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (<= 0 (+ ~N~0 2147483648)) (= (store |old(#length)| |main_~#x~0.base| (* 4 ~N~0)) |#length|) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (not (<= (mod v_prenex_2 4294967296) 2147483647)) (<= ~N~0 2147483647) (<= |#NULL.base| 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (= (+ (mod v_prenex_2 4294967296) (- 4294967296)) main_~ret~1) (= main_~temp~0 (select (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset|)) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= 0 (+ main_~ret~1 2147483648)) (= 0 |old(~N~0)|) (<= main_~ret~1 2147483647) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0)) (and (= 0 |#NULL.base|) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (= (store |old(#memory_int)| |main_~#x~0.base| (store (store (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset| (select (select |old(#memory_int)| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (+ |main_~#x~0.offset| 4) main_~temp~0)) |#memory_int|) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (<= 0 (+ ~N~0 2147483648)) (= (store |old(#length)| |main_~#x~0.base| (* 4 ~N~0)) |#length|) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= ~N~0 2147483647) (<= |#NULL.base| 0) (= main_~ret~1 (mod v_prenex_1 4294967296)) (= (select |old(#valid)| |main_~#x~0.base|) 0) (= main_~temp~0 (select (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset|)) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= 0 (+ main_~ret~1 2147483648)) (= 0 |old(~N~0)|) (<= main_~ret~1 2147483647) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0) (<= (mod v_prenex_1 4294967296) 2147483647)) (and (= 0 |#NULL.base|) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (= (store |old(#memory_int)| |main_~#x~0.base| (store (store (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset| (select (select |old(#memory_int)| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (+ |main_~#x~0.offset| 4) main_~temp~0)) |#memory_int|) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (<= 0 (+ ~N~0 2147483648)) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_1 4294967296) 2147483647)) (= (store |old(#length)| |main_~#x~0.base| (* 4 ~N~0)) |#length|) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= ~N~0 2147483647) (<= |#NULL.base| 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (= main_~temp~0 (select (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset|)) (= main_~ret~1 (+ (mod v_sep_~ret~0_BEFORE_RETURN_1 4294967296) (- 4294967296))) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= 0 (+ main_~ret~1 2147483648)) (= 0 |old(~N~0)|) (<= main_~ret~1 2147483647) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0)) (and (= 0 |#NULL.base|) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (= (store |old(#memory_int)| |main_~#x~0.base| (store (store (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset| (select (select |old(#memory_int)| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (+ |main_~#x~0.offset| 4) main_~temp~0)) |#memory_int|) (= main_~ret~1 (mod v_sep_~ret~0_BEFORE_RETURN_2 4294967296)) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (<= (mod v_sep_~ret~0_BEFORE_RETURN_2 4294967296) 2147483647) (<= 0 (+ ~N~0 2147483648)) (= (store |old(#length)| |main_~#x~0.base| (* 4 ~N~0)) |#length|) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= ~N~0 2147483647) (<= |#NULL.base| 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (= main_~temp~0 (select (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset|)) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= 0 (+ main_~ret~1 2147483648)) (= 0 |old(~N~0)|) (<= main_~ret~1 2147483647) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0)))) (exists ((v_prenex_2 Int) (v_prenex_1 Int) (v_sep_~ret~0_BEFORE_RETURN_2 Int) (v_sep_~ret~0_BEFORE_RETURN_1 Int)) (or (and (= 0 |#NULL.base|) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (= (store |old(#memory_int)| |main_~#x~0.base| (store (store (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset| (select (select |old(#memory_int)| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (+ |main_~#x~0.offset| 4) main_~temp~0)) |#memory_int|) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (<= 0 (+ ~N~0 2147483648)) (= (store |old(#length)| |main_~#x~0.base| (* 4 ~N~0)) |#length|) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (not (<= (mod v_prenex_2 4294967296) 2147483647)) (<= ~N~0 2147483647) (<= |#NULL.base| 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (= (+ (mod v_prenex_2 4294967296) (- 4294967296)) main_~ret~1) (= main_~temp~0 (select (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset|)) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= 0 (+ main_~ret~1 2147483648)) (= 0 |old(~N~0)|) (<= main_~ret~1 2147483647) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0)) (and (= 0 |#NULL.base|) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (= (store |old(#memory_int)| |main_~#x~0.base| (store (store (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset| (select (select |old(#memory_int)| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (+ |main_~#x~0.offset| 4) main_~temp~0)) |#memory_int|) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (<= 0 (+ ~N~0 2147483648)) (= (store |old(#length)| |main_~#x~0.base| (* 4 ~N~0)) |#length|) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= ~N~0 2147483647) (<= |#NULL.base| 0) (= main_~ret~1 (mod v_prenex_1 4294967296)) (= (select |old(#valid)| |main_~#x~0.base|) 0) (= main_~temp~0 (select (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset|)) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= 0 (+ main_~ret~1 2147483648)) (= 0 |old(~N~0)|) (<= main_~ret~1 2147483647) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0) (<= (mod v_prenex_1 4294967296) 2147483647)) (and (= 0 |#NULL.base|) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (= (store |old(#memory_int)| |main_~#x~0.base| (store (store (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset| (select (select |old(#memory_int)| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (+ |main_~#x~0.offset| 4) main_~temp~0)) |#memory_int|) (= main_~ret~1 (mod v_sep_~ret~0_BEFORE_RETURN_2 4294967296)) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (<= (mod v_sep_~ret~0_BEFORE_RETURN_2 4294967296) 2147483647) (<= 0 (+ ~N~0 2147483648)) (= (store |old(#length)| |main_~#x~0.base| (* 4 ~N~0)) |#length|) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= ~N~0 2147483647) (<= |#NULL.base| 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (= main_~temp~0 (select (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset|)) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= 0 (+ main_~ret~1 2147483648)) (= 0 |old(~N~0)|) (<= main_~ret~1 2147483647) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0)) (and (= 0 |#NULL.base|) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (= (store |old(#memory_int)| |main_~#x~0.base| (store (store (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset| (select (select |old(#memory_int)| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (+ |main_~#x~0.offset| 4) main_~temp~0)) |#memory_int|) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (<= 0 (+ ~N~0 2147483648)) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_1 4294967296) 2147483647)) (= (store |old(#length)| |main_~#x~0.base| (* 4 ~N~0)) |#length|) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= ~N~0 2147483647) (<= |#NULL.base| 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (= main_~temp~0 (select (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset|)) (= main_~ret~1 (+ (mod v_sep_~ret~0_BEFORE_RETURN_1 4294967296) (- 4294967296))) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= 0 (+ main_~ret~1 2147483648)) (= 0 |old(~N~0)|) (<= main_~ret~1 2147483647) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0))))) [2019-10-07 15:25:59,743 INFO L193 IcfgInterpreter]: Reachable states at location L23 satisfy 38#(and (= 0 |#NULL.base|) (<= ~N~0 2147483647) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= 0 |old(~N~0)|) (<= 0 (+ ~N~0 2147483648)) (= |#valid| |old(#valid)|) (= |#memory_int| |old(#memory_int)|) (<= |old(~N~0)| 0) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|)) [2019-10-07 15:25:59,743 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 636#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= ~N~0 |old(~N~0)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-07 15:25:59,744 INFO L193 IcfgInterpreter]: Reachable states at location mainErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 213#(or (and (exists ((v_prenex_29 Int) (v_prenex_30 Int) (v_sep_~ret~0_BEFORE_RETURN_6 Int) (v_sep_~ret~0_BEFORE_RETURN_5 Int)) (or (and (= main_~ret5~0 (mod v_prenex_30 4294967296)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ (* 4 ~N~0) |main_~#x~0.offset| (- 4)))) (<= (mod v_prenex_30 4294967296) 2147483647) (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (not (< (+ main_~i~1 1) ~N~0))) (and (not (<= (mod v_prenex_29 4294967296) 2147483647)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ (* 4 ~N~0) |main_~#x~0.offset| (- 4)))) (= main_~ret5~0 (+ (mod v_prenex_29 4294967296) (- 4294967296))) (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (not (< (+ main_~i~1 1) ~N~0))) (and (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ (* 4 ~N~0) |main_~#x~0.offset| (- 4)))) (<= (mod v_sep_~ret~0_BEFORE_RETURN_5 4294967296) 2147483647) (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (= (mod v_sep_~ret~0_BEFORE_RETURN_5 4294967296) main_~ret5~0) (not (< (+ main_~i~1 1) ~N~0))) (and (= main_~ret5~0 (+ (mod v_sep_~ret~0_BEFORE_RETURN_6 4294967296) (- 4294967296))) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ (* 4 ~N~0) |main_~#x~0.offset| (- 4)))) (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_6 4294967296) 2147483647)) (not (< (+ main_~i~1 1) ~N~0))))) (not (= main_~ret~1 main_~ret5~0))) (and (not (= main_~ret~1 main_~ret2~0)) (exists ((v_prenex_29 Int) (v_prenex_30 Int) (v_sep_~ret~0_BEFORE_RETURN_6 Int) (v_sep_~ret~0_BEFORE_RETURN_5 Int)) (or (and (= main_~ret5~0 (mod v_prenex_30 4294967296)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ (* 4 ~N~0) |main_~#x~0.offset| (- 4)))) (<= (mod v_prenex_30 4294967296) 2147483647) (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (not (< (+ main_~i~1 1) ~N~0))) (and (not (<= (mod v_prenex_29 4294967296) 2147483647)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ (* 4 ~N~0) |main_~#x~0.offset| (- 4)))) (= main_~ret5~0 (+ (mod v_prenex_29 4294967296) (- 4294967296))) (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (not (< (+ main_~i~1 1) ~N~0))) (and (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ (* 4 ~N~0) |main_~#x~0.offset| (- 4)))) (<= (mod v_sep_~ret~0_BEFORE_RETURN_5 4294967296) 2147483647) (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (= (mod v_sep_~ret~0_BEFORE_RETURN_5 4294967296) main_~ret5~0) (not (< (+ main_~i~1 1) ~N~0))) (and (= main_~ret5~0 (+ (mod v_sep_~ret~0_BEFORE_RETURN_6 4294967296) (- 4294967296))) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ (* 4 ~N~0) |main_~#x~0.offset| (- 4)))) (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_6 4294967296) 2147483647)) (not (< (+ main_~i~1 1) ~N~0))))))) [2019-10-07 15:25:59,744 INFO L193 IcfgInterpreter]: Reachable states at location sepENTRY satisfy 580#true [2019-10-07 15:25:59,744 INFO L193 IcfgInterpreter]: Reachable states at location L9-3 satisfy 627#(<= 0 sep_~i~0) [2019-10-07 15:25:59,744 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 ~N~0) (= 0 |#NULL.base|) (<= 0 ~N~0) (<= |#NULL.base| 0) (<= ~N~0 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-07 15:25:59,744 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= ~N~0 0) (<= 0 |#NULL.base|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= 0 |old(~N~0)|) (<= 0 ~N~0) (= |#valid| |old(#valid)|) (= ~N~0 |old(~N~0)|) (= |#memory_int| |old(#memory_int)|) (<= |old(~N~0)| 0) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|)) [2019-10-07 15:25:59,745 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 641#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 ~N~0) (= 0 |#NULL.base|) (<= 0 ~N~0) (<= |#NULL.base| 0) (<= ~N~0 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-07 15:25:59,746 INFO L193 IcfgInterpreter]: Reachable states at location L39-1 satisfy 458#true [2019-10-07 15:25:59,747 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-07 15:25:59,747 INFO L193 IcfgInterpreter]: Reachable states at location L39 satisfy 501#(and (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ (* 4 ~N~0) |main_~#x~0.offset| (- 4)))) (not (< (+ main_~i~1 1) ~N~0))) [2019-10-07 15:25:59,747 INFO L193 IcfgInterpreter]: Reachable states at location sepEXIT satisfy 632#(and (= |sep_#res| (ite (<= (mod sep_~ret~0 4294967296) 2147483647) (mod sep_~ret~0 4294967296) (+ (mod sep_~ret~0 4294967296) (- 4294967296)))) (<= 0 sep_~i~0) (not (< sep_~i~0 ~N~0))) [2019-10-07 15:25:59,748 INFO L193 IcfgInterpreter]: Reachable states at location L30-1 satisfy 99#(or (exists ((v_prenex_1 Int) (v_sep_~ret~0_BEFORE_RETURN_1 Int)) (or (and (= 0 |#NULL.base|) (<= ~N~0 2147483647) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (<= |#NULL.base| 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (= 0 |old(~N~0)|) (<= 0 (+ ~N~0 2147483648)) (= (store |old(#length)| |main_~#x~0.base| (* 4 ~N~0)) |#length|) (= (mod v_prenex_1 4294967296) |main_#t~ret5|) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0) (<= (mod v_prenex_1 4294967296) 2147483647)) (and (= 0 |#NULL.base|) (<= ~N~0 2147483647) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (<= |#NULL.base| 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (= (+ (mod v_sep_~ret~0_BEFORE_RETURN_1 4294967296) (- 4294967296)) |main_#t~ret5|) (= 0 |old(~N~0)|) (<= 0 (+ ~N~0 2147483648)) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_1 4294967296) 2147483647)) (= (store |old(#length)| |main_~#x~0.base| (* 4 ~N~0)) |#length|) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0)))) (exists ((v_prenex_2 Int) (v_sep_~ret~0_BEFORE_RETURN_2 Int)) (or (and (not (<= (mod v_prenex_2 4294967296) 2147483647)) (= 0 |#NULL.base|) (<= ~N~0 2147483647) (= (+ (mod v_prenex_2 4294967296) (- 4294967296)) |main_#t~ret5|) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (<= |#NULL.base| 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (= 0 |old(~N~0)|) (<= 0 (+ ~N~0 2147483648)) (= (store |old(#length)| |main_~#x~0.base| (* 4 ~N~0)) |#length|) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0)) (and (= 0 |#NULL.base|) (<= ~N~0 2147483647) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (<= |#NULL.base| 0) (= (mod v_sep_~ret~0_BEFORE_RETURN_2 4294967296) |main_#t~ret5|) (= (select |old(#valid)| |main_~#x~0.base|) 0) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= (mod v_sep_~ret~0_BEFORE_RETURN_2 4294967296) 2147483647) (= 0 |old(~N~0)|) (<= 0 (+ ~N~0 2147483648)) (= (store |old(#length)| |main_~#x~0.base| (* 4 ~N~0)) |#length|) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0))))) [2019-10-07 15:25:59,755 INFO L193 IcfgInterpreter]: Reachable states at location L30 satisfy 43#(and (= 0 |#NULL.base|) (<= ~N~0 2147483647) (<= |#NULL.base| 0) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (= (select |old(#valid)| |main_~#x~0.base|) 0) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |main_~#x~0.offset|) (<= |main_~#x~0.offset| 0) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= 0 |old(~N~0)|) (<= 0 (+ ~N~0 2147483648)) (<= 1 ~N~0) (= (store |old(#length)| |main_~#x~0.base| (* 4 ~N~0)) |#length|) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0)) [2019-10-07 15:25:59,755 INFO L193 IcfgInterpreter]: Reachable states at location L41 satisfy 359#true [2019-10-07 15:25:59,755 INFO L193 IcfgInterpreter]: Reachable states at location L42 satisfy 292#true [2019-10-07 15:25:59,756 INFO L193 IcfgInterpreter]: Reachable states at location L33-1 satisfy 566#true [2019-10-07 15:25:59,756 INFO L193 IcfgInterpreter]: Reachable states at location L35-3 satisfy 539#true [2019-10-07 15:26:00,451 INFO L211 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-07 15:26:00,452 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 12] total 20 [2019-10-07 15:26:00,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-07 15:26:00,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-07 15:26:00,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2019-10-07 15:26:00,456 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 21 states. [2019-10-07 15:26:01,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 15:26:01,037 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2019-10-07 15:26:01,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-07 15:26:01,037 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2019-10-07 15:26:01,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 15:26:01,038 INFO L225 Difference]: With dead ends: 36 [2019-10-07 15:26:01,039 INFO L226 Difference]: Without dead ends: 22 [2019-10-07 15:26:01,040 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2019-10-07 15:26:01,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-07 15:26:01,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-07 15:26:01,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-07 15:26:01,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-10-07 15:26:01,048 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 28 [2019-10-07 15:26:01,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 15:26:01,048 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-10-07 15:26:01,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-07 15:26:01,048 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-10-07 15:26:01,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-07 15:26:01,050 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 15:26:01,050 INFO L385 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 15:26:01,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 15:26:01,255 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 15:26:01,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 15:26:01,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1847709653, now seen corresponding path program 2 times [2019-10-07 15:26:01,257 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 15:26:01,258 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 15:26:01,258 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 15:26:01,258 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 15:26:01,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 15:26:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 15:26:02,409 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 39 [2019-10-07 15:26:02,699 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 56 [2019-10-07 15:26:02,853 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2019-10-07 15:26:03,018 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2019-10-07 15:26:03,186 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2019-10-07 15:26:03,461 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 57 [2019-10-07 15:26:03,609 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2019-10-07 15:26:03,782 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2019-10-07 15:26:03,976 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2019-10-07 15:26:04,249 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2019-10-07 15:26:04,553 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2019-10-07 15:26:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-07 15:26:04,730 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 15:26:04,730 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 15:26:04,730 INFO L93 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 [2019-10-07 15:26:04,849 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-07 15:26:04,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-07 15:26:04,853 WARN L254 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 82 conjunts are in the unsatisfiable core [2019-10-07 15:26:04,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 15:26:18,678 WARN L191 SmtUtils]: Spent 12.73 s on a formula simplification. DAG size of input: 119 DAG size of output: 101 [2019-10-07 15:26:19,944 WARN L191 SmtUtils]: Spent 861.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2019-10-07 15:26:21,510 WARN L191 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 480