/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-multidimensional/init-4-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:29:51,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:29:51,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:29:51,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:29:51,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:29:51,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:29:51,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:29:51,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:29:51,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:29:51,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:29:51,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:29:51,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:29:51,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:29:51,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:29:51,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:29:51,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:29:51,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:29:51,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:29:51,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:29:51,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:29:51,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:29:51,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:29:51,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:29:51,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:29:51,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:29:51,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:29:51,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:29:51,258 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:29:51,259 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 01:29:51,294 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:29:51,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:29:51,298 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:29:51,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:29:51,299 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:29:51,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:29:51,299 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:29:51,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:29:51,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:29:51,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:29:51,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:29:51,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:29:51,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:29:51,300 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:29:51,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:29:51,302 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:29:51,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:29:51,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:29:51,303 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:29:51,303 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:29:51,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:29:51,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:29:51,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:29:51,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:29:51,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:29:51,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:29:51,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:29:51,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:29:51,305 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 01:29:51,588 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:29:51,601 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:29:51,604 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:29:51,606 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:29:51,606 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:29:51,607 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-4-n-u.c [2019-11-07 01:29:51,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3b57d5d0/86db87683aa44f1085c053ab7ab44003/FLAG62371e542 [2019-11-07 01:29:52,142 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:29:52,143 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-4-n-u.c [2019-11-07 01:29:52,150 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3b57d5d0/86db87683aa44f1085c053ab7ab44003/FLAG62371e542 [2019-11-07 01:29:52,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3b57d5d0/86db87683aa44f1085c053ab7ab44003 [2019-11-07 01:29:52,178 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:29:52,180 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:29:52,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:29:52,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:29:52,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:29:52,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:29:52" (1/1) ... [2019-11-07 01:29:52,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2235ba99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:52, skipping insertion in model container [2019-11-07 01:29:52,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:29:52" (1/1) ... [2019-11-07 01:29:52,197 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:29:52,217 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:29:52,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:29:52,455 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:29:52,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:29:52,639 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:29:52,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:52 WrapperNode [2019-11-07 01:29:52,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:29:52,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:29:52,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:29:52,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:29:52,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:52" (1/1) ... [2019-11-07 01:29:52,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:52" (1/1) ... [2019-11-07 01:29:52,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:52" (1/1) ... [2019-11-07 01:29:52,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:52" (1/1) ... [2019-11-07 01:29:52,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:52" (1/1) ... [2019-11-07 01:29:52,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:52" (1/1) ... [2019-11-07 01:29:52,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:52" (1/1) ... [2019-11-07 01:29:52,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:29:52,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:29:52,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:29:52,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:29:52,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:29:52,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:29:52,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:29:52,794 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:29:52,795 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:29:52,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:29:52,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:29:52,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:29:52,797 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:29:52,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:29:52,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:29:52,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:29:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:29:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:29:52,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:29:53,233 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:29:53,233 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-07 01:29:53,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:29:53 BoogieIcfgContainer [2019-11-07 01:29:53,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:29:53,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:29:53,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:29:53,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:29:53,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:29:52" (1/3) ... [2019-11-07 01:29:53,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4896fa71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:29:53, skipping insertion in model container [2019-11-07 01:29:53,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:52" (2/3) ... [2019-11-07 01:29:53,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4896fa71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:29:53, skipping insertion in model container [2019-11-07 01:29:53,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:29:53" (3/3) ... [2019-11-07 01:29:53,243 INFO L109 eAbstractionObserver]: Analyzing ICFG init-4-n-u.c [2019-11-07 01:29:53,253 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:29:53,261 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:29:53,273 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:29:53,299 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:29:53,299 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:29:53,299 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:29:53,299 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:29:53,299 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:29:53,300 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:29:53,300 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:29:53,300 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:29:53,318 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-11-07 01:29:53,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:29:53,325 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:53,326 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:53,329 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:53,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:53,334 INFO L82 PathProgramCache]: Analyzing trace with hash -463394287, now seen corresponding path program 1 times [2019-11-07 01:29:53,342 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:53,342 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691585602] [2019-11-07 01:29:53,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:53,425 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:53,425 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067726182] [2019-11-07 01:29:53,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:53,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:29:53,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:29:53,559 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:53,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:29:53,589 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691585602] [2019-11-07 01:29:53,589 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:53,589 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067726182] [2019-11-07 01:29:53,590 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:29:53,591 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-07 01:29:53,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029959184] [2019-11-07 01:29:53,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:29:53,597 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:53,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:29:53,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:29:53,615 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2019-11-07 01:29:53,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:53,697 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2019-11-07 01:29:53,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:29:53,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-07 01:29:53,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:53,708 INFO L225 Difference]: With dead ends: 44 [2019-11-07 01:29:53,709 INFO L226 Difference]: Without dead ends: 26 [2019-11-07 01:29:53,713 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:29:53,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-07 01:29:53,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-07 01:29:53,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-07 01:29:53,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2019-11-07 01:29:53,755 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 14 [2019-11-07 01:29:53,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:53,755 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2019-11-07 01:29:53,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:29:53,756 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-11-07 01:29:53,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 01:29:53,757 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:53,757 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:53,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:53,960 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:53,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:53,962 INFO L82 PathProgramCache]: Analyzing trace with hash 269738403, now seen corresponding path program 1 times [2019-11-07 01:29:53,962 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:53,962 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633384150] [2019-11-07 01:29:53,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:54,004 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:54,004 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377645512] [2019-11-07 01:29:54,005 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 [2019-11-07 01:29:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:54,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:29:54,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:29:54,236 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:29:54,266 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633384150] [2019-11-07 01:29:54,266 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:54,267 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377645512] [2019-11-07 01:29:54,267 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:29:54,268 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-07 01:29:54,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377554319] [2019-11-07 01:29:54,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:29:54,271 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:54,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:29:54,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:29:54,273 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2019-11-07 01:29:54,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:54,418 INFO L93 Difference]: Finished difference Result 58 states and 88 transitions. [2019-11-07 01:29:54,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:29:54,419 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-11-07 01:29:54,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:54,424 INFO L225 Difference]: With dead ends: 58 [2019-11-07 01:29:54,424 INFO L226 Difference]: Without dead ends: 41 [2019-11-07 01:29:54,427 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:29:54,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-07 01:29:54,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-07 01:29:54,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-07 01:29:54,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 57 transitions. [2019-11-07 01:29:54,462 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 57 transitions. Word has length 18 [2019-11-07 01:29:54,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:54,464 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 57 transitions. [2019-11-07 01:29:54,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:29:54,464 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 57 transitions. [2019-11-07 01:29:54,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-07 01:29:54,468 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:54,468 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:54,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:54,681 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:54,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:54,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1600313997, now seen corresponding path program 1 times [2019-11-07 01:29:54,683 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:54,683 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951840554] [2019-11-07 01:29:54,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:54,702 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:54,715 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128414899] [2019-11-07 01:29:54,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-07 01:29:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:54,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:29:54,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 01:29:54,845 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-07 01:29:54,866 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951840554] [2019-11-07 01:29:54,866 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:54,866 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128414899] [2019-11-07 01:29:54,866 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:29:54,867 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-07 01:29:54,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014679600] [2019-11-07 01:29:54,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:29:54,868 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:54,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:29:54,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:29:54,869 INFO L87 Difference]: Start difference. First operand 40 states and 57 transitions. Second operand 6 states. [2019-11-07 01:29:54,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:54,980 INFO L93 Difference]: Finished difference Result 94 states and 146 transitions. [2019-11-07 01:29:54,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:29:54,982 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-11-07 01:29:54,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:54,984 INFO L225 Difference]: With dead ends: 94 [2019-11-07 01:29:54,984 INFO L226 Difference]: Without dead ends: 63 [2019-11-07 01:29:54,985 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:29:54,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-07 01:29:55,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-11-07 01:29:55,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-07 01:29:55,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 87 transitions. [2019-11-07 01:29:55,013 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 87 transitions. Word has length 26 [2019-11-07 01:29:55,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:55,013 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 87 transitions. [2019-11-07 01:29:55,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:29:55,013 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 87 transitions. [2019-11-07 01:29:55,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-07 01:29:55,015 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:55,015 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:55,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:55,228 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:55,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:55,228 INFO L82 PathProgramCache]: Analyzing trace with hash -225342757, now seen corresponding path program 1 times [2019-11-07 01:29:55,228 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:55,229 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136739810] [2019-11-07 01:29:55,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:55,259 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:55,263 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226253219] [2019-11-07 01:29:55,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:55,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:29:55,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-11-07 01:29:55,489 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-11-07 01:29:55,520 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136739810] [2019-11-07 01:29:55,521 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:55,521 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226253219] [2019-11-07 01:29:55,521 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:29:55,521 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-07 01:29:55,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875936558] [2019-11-07 01:29:55,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:29:55,522 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:55,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:29:55,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:29:55,523 INFO L87 Difference]: Start difference. First operand 62 states and 87 transitions. Second operand 6 states. [2019-11-07 01:29:55,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:55,659 INFO L93 Difference]: Finished difference Result 148 states and 225 transitions. [2019-11-07 01:29:55,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:29:55,660 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2019-11-07 01:29:55,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:55,663 INFO L225 Difference]: With dead ends: 148 [2019-11-07 01:29:55,663 INFO L226 Difference]: Without dead ends: 95 [2019-11-07 01:29:55,664 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:29:55,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-07 01:29:55,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2019-11-07 01:29:55,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-07 01:29:55,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 123 transitions. [2019-11-07 01:29:55,699 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 123 transitions. Word has length 42 [2019-11-07 01:29:55,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:55,700 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 123 transitions. [2019-11-07 01:29:55,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:29:55,700 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 123 transitions. [2019-11-07 01:29:55,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-07 01:29:55,705 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:55,705 INFO L410 BasicCegarLoop]: trace histogram [16, 8, 8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:55,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:55,909 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:55,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:55,909 INFO L82 PathProgramCache]: Analyzing trace with hash -101744677, now seen corresponding path program 1 times [2019-11-07 01:29:55,910 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:55,910 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961901712] [2019-11-07 01:29:55,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:55,951 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:55,957 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510508939] [2019-11-07 01:29:55,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:56,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:29:56,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:56,112 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 81 proven. 3 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-11-07 01:29:56,112 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:56,154 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 81 proven. 3 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-11-07 01:29:56,156 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961901712] [2019-11-07 01:29:56,156 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:56,156 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510508939] [2019-11-07 01:29:56,157 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [525174754] [2019-11-07 01:29:56,214 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 01:29:56,215 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:56,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:56,230 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:56,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:56,406 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:58,343 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2019-11-07 01:29:58,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:58,356 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:58,774 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2019-11-07 01:29:59,032 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 37 [2019-11-07 01:29:59,271 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2019-11-07 01:29:59,545 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2019-11-07 01:29:59,618 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:29:59,618 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 13] total 23 [2019-11-07 01:29:59,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183667835] [2019-11-07 01:29:59,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:29:59,620 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:59,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:29:59,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:29:59,621 INFO L87 Difference]: Start difference. First operand 94 states and 123 transitions. Second operand 23 states. [2019-11-07 01:30:00,090 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2019-11-07 01:30:00,237 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2019-11-07 01:30:00,911 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2019-11-07 01:30:01,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:01,588 INFO L93 Difference]: Finished difference Result 269 states and 390 transitions. [2019-11-07 01:30:01,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-07 01:30:01,589 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 58 [2019-11-07 01:30:01,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:01,591 INFO L225 Difference]: With dead ends: 269 [2019-11-07 01:30:01,591 INFO L226 Difference]: Without dead ends: 186 [2019-11-07 01:30:01,593 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 150 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2019-11-07 01:30:01,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-11-07 01:30:01,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2019-11-07 01:30:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2019-11-07 01:30:01,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 229 transitions. [2019-11-07 01:30:01,646 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 229 transitions. Word has length 58 [2019-11-07 01:30:01,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:01,646 INFO L462 AbstractCegarLoop]: Abstraction has 183 states and 229 transitions. [2019-11-07 01:30:01,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:30:01,647 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 229 transitions. [2019-11-07 01:30:01,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-07 01:30:01,653 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:01,653 INFO L410 BasicCegarLoop]: trace histogram [48, 8, 8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:01,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:01,859 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:01,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:01,859 INFO L82 PathProgramCache]: Analyzing trace with hash 387426779, now seen corresponding path program 2 times [2019-11-07 01:30:01,860 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:01,860 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793144054] [2019-11-07 01:30:01,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:01,887 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:01,888 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313087062] [2019-11-07 01:30:01,888 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:02,057 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-07 01:30:02,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:30:02,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 01:30:02,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:30:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 361 proven. 21 refuted. 0 times theorem prover too weak. 1242 trivial. 0 not checked. [2019-11-07 01:30:02,173 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:30:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 18 proven. 364 refuted. 0 times theorem prover too weak. 1242 trivial. 0 not checked. [2019-11-07 01:30:02,275 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793144054] [2019-11-07 01:30:02,275 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:30:02,276 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313087062] [2019-11-07 01:30:02,276 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1469159477] [2019-11-07 01:30:02,279 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 01:30:02,280 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:30:02,280 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:30:02,280 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:30:02,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:30:02,327 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:30:03,563 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2019-11-07 01:30:03,571 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:30:03,572 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:30:03,920 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2019-11-07 01:30:04,169 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 37 [2019-11-07 01:30:04,433 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2019-11-07 01:30:04,691 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2019-11-07 01:30:04,753 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:30:04,754 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 31 [2019-11-07 01:30:04,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24377037] [2019-11-07 01:30:04,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-07 01:30:04,756 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:30:04,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-07 01:30:04,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=706, Unknown=0, NotChecked=0, Total=930 [2019-11-07 01:30:04,758 INFO L87 Difference]: Start difference. First operand 183 states and 229 transitions. Second operand 31 states. [2019-11-07 01:30:06,884 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2019-11-07 01:30:07,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:30:07,932 INFO L93 Difference]: Finished difference Result 514 states and 732 transitions. [2019-11-07 01:30:07,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-07 01:30:07,933 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 90 [2019-11-07 01:30:07,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:30:07,936 INFO L225 Difference]: With dead ends: 514 [2019-11-07 01:30:07,936 INFO L226 Difference]: Without dead ends: 346 [2019-11-07 01:30:07,939 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 238 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=682, Invalid=2074, Unknown=0, NotChecked=0, Total=2756 [2019-11-07 01:30:07,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2019-11-07 01:30:07,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 343. [2019-11-07 01:30:07,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-11-07 01:30:08,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 421 transitions. [2019-11-07 01:30:08,000 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 421 transitions. Word has length 90 [2019-11-07 01:30:08,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:30:08,001 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 421 transitions. [2019-11-07 01:30:08,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-07 01:30:08,001 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 421 transitions. [2019-11-07 01:30:08,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-07 01:30:08,003 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:30:08,003 INFO L410 BasicCegarLoop]: trace histogram [112, 8, 8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:30:08,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:30:08,214 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:30:08,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:30:08,215 INFO L82 PathProgramCache]: Analyzing trace with hash -937886245, now seen corresponding path program 3 times [2019-11-07 01:30:08,215 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:30:08,215 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332457889] [2019-11-07 01:30:08,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:30:08,256 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:30:08,256 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633494246] [2019-11-07 01:30:08,257 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true