java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-industry-pattern/array_mul_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:35:56,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:35:56,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:35:56,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:35:56,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:35:56,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:35:56,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:35:56,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:35:56,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:35:56,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:35:56,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:35:56,962 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:35:56,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:35:56,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:35:56,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:35:56,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:35:56,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:35:56,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:35:56,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:35:56,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:35:56,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:35:56,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:35:56,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:35:56,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:35:56,979 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:35:56,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:35:56,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:35:56,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:35:56,990 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:35:57,004 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:35:57,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:35:57,005 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:35:57,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:35:57,006 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:35:57,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:35:57,006 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:35:57,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:35:57,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:35:57,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:35:57,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:35:57,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:35:57,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:35:57,008 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:35:57,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:35:57,008 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:35:57,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:35:57,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:35:57,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:35:57,009 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:35:57,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:35:57,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:35:57,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:35:57,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:35:57,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:35:57,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:35:57,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:35:57,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:35:57,012 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:35:57,295 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:35:57,312 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:35:57,316 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:35:57,317 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:35:57,318 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:35:57,318 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_mul_init.i [2019-10-15 01:35:57,390 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8858683ac/ececdbcb4f934ab393d8d29f96692770/FLAG9000dc3ad [2019-10-15 01:35:57,832 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:35:57,835 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_mul_init.i [2019-10-15 01:35:57,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8858683ac/ececdbcb4f934ab393d8d29f96692770/FLAG9000dc3ad [2019-10-15 01:35:58,228 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8858683ac/ececdbcb4f934ab393d8d29f96692770 [2019-10-15 01:35:58,239 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:35:58,240 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:35:58,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:58,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:35:58,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:35:58,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:58" (1/1) ... [2019-10-15 01:35:58,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@287e3a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:58, skipping insertion in model container [2019-10-15 01:35:58,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:58" (1/1) ... [2019-10-15 01:35:58,258 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:35:58,276 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:35:58,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:58,521 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:35:58,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:58,567 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:35:58,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:58 WrapperNode [2019-10-15 01:35:58,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:58,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:35:58,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:35:58,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:35:58,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:58" (1/1) ... [2019-10-15 01:35:58,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:58" (1/1) ... [2019-10-15 01:35:58,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:58" (1/1) ... [2019-10-15 01:35:58,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:58" (1/1) ... [2019-10-15 01:35:58,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:58" (1/1) ... [2019-10-15 01:35:58,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:58" (1/1) ... [2019-10-15 01:35:58,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:58" (1/1) ... [2019-10-15 01:35:58,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:35:58,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:35:58,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:35:58,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:35:58,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:35:58,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:35:58,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:35:58,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:35:58,758 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:35:58,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:35:58,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:35:58,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2019-10-15 01:35:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:35:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:35:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:35:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:35:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:35:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:35:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:35:59,378 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:35:59,379 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:35:59,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:59 BoogieIcfgContainer [2019-10-15 01:35:59,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:35:59,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:35:59,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:35:59,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:35:59,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:35:58" (1/3) ... [2019-10-15 01:35:59,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c0b7e7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:59, skipping insertion in model container [2019-10-15 01:35:59,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:58" (2/3) ... [2019-10-15 01:35:59,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c0b7e7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:59, skipping insertion in model container [2019-10-15 01:35:59,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:59" (3/3) ... [2019-10-15 01:35:59,391 INFO L109 eAbstractionObserver]: Analyzing ICFG array_mul_init.i [2019-10-15 01:35:59,402 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:35:59,410 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:35:59,423 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:35:59,448 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:35:59,448 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:35:59,448 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:35:59,448 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:35:59,448 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:35:59,449 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:35:59,449 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:35:59,449 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:35:59,465 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 01:35:59,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:35:59,471 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:59,471 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:59,473 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:59,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:59,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1175017612, now seen corresponding path program 1 times [2019-10-15 01:35:59,486 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:59,486 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658952183] [2019-10-15 01:35:59,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:59,487 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:59,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:59,574 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:35:59,575 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301043766] [2019-10-15 01:35:59,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:59,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 01:35:59,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:59,689 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:59,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658952183] [2019-10-15 01:35:59,718 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:35:59,720 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301043766] [2019-10-15 01:35:59,721 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:59,721 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-15 01:35:59,722 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005123058] [2019-10-15 01:35:59,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:35:59,729 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:59,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:35:59,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:35:59,750 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2019-10-15 01:35:59,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:59,868 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2019-10-15 01:35:59,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:35:59,871 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-10-15 01:35:59,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:59,884 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:35:59,884 INFO L226 Difference]: Without dead ends: 24 [2019-10-15 01:35:59,892 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:35:59,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-15 01:35:59,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2019-10-15 01:35:59,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:35:59,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-15 01:35:59,952 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2019-10-15 01:35:59,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:59,953 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-15 01:35:59,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:35:59,953 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-15 01:35:59,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:35:59,954 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:59,954 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:00,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:00,156 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:00,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:00,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1543491660, now seen corresponding path program 1 times [2019-10-15 01:36:00,158 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:00,158 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610907634] [2019-10-15 01:36:00,159 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:00,159 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:00,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:00,200 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:00,201 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701395923] [2019-10-15 01:36:00,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:00,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:36:00,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:36:00,294 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:36:00,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610907634] [2019-10-15 01:36:00,357 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:00,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701395923] [2019-10-15 01:36:00,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [551520385] [2019-10-15 01:36:00,409 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:36:00,410 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:00,419 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:00,429 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:00,430 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:00,724 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:01,382 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2019-10-15 01:36:01,404 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:01,417 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:01,929 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:36:01,930 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9] total 17 [2019-10-15 01:36:01,930 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60314824] [2019-10-15 01:36:01,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:36:01,934 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:01,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:36:01,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:36:01,936 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 17 states. [2019-10-15 01:36:03,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:03,509 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2019-10-15 01:36:03,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:36:03,510 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2019-10-15 01:36:03,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:03,512 INFO L225 Difference]: With dead ends: 62 [2019-10-15 01:36:03,512 INFO L226 Difference]: Without dead ends: 50 [2019-10-15 01:36:03,514 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:36:03,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-15 01:36:03,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 28. [2019-10-15 01:36:03,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 01:36:03,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-10-15 01:36:03,535 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2019-10-15 01:36:03,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:03,536 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-10-15 01:36:03,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:36:03,536 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-10-15 01:36:03,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:36:03,537 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:03,538 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:03,738 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:03,739 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:03,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1581662156, now seen corresponding path program 2 times [2019-10-15 01:36:03,739 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:03,740 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735490138] [2019-10-15 01:36:03,740 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:03,740 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:03,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:03,774 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:03,776 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861704579] [2019-10-15 01:36:03,776 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:26,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 01:36:26,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:26,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 01:36:26,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:36:26,293 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:36:26,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735490138] [2019-10-15 01:36:26,383 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:26,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861704579] [2019-10-15 01:36:26,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [223894432] [2019-10-15 01:36:26,385 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:36:26,385 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:26,386 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:26,386 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:26,386 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:26,418 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:26,745 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2019-10-15 01:36:26,767 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:26,782 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:27,341 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:36:27,342 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2019-10-15 01:36:27,342 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178278630] [2019-10-15 01:36:27,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:36:27,344 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:27,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:36:27,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:36:27,345 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 25 states. [2019-10-15 01:36:29,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:29,473 INFO L93 Difference]: Finished difference Result 106 states and 137 transitions. [2019-10-15 01:36:29,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-15 01:36:29,476 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2019-10-15 01:36:29,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:29,478 INFO L225 Difference]: With dead ends: 106 [2019-10-15 01:36:29,478 INFO L226 Difference]: Without dead ends: 90 [2019-10-15 01:36:29,480 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=466, Invalid=1426, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:36:29,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-15 01:36:29,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 44. [2019-10-15 01:36:29,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-15 01:36:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2019-10-15 01:36:29,495 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 24 [2019-10-15 01:36:29,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:29,495 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2019-10-15 01:36:29,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 01:36:29,496 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2019-10-15 01:36:29,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-15 01:36:29,497 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:29,497 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:29,697 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:29,698 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:29,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:29,699 INFO L82 PathProgramCache]: Analyzing trace with hash 459727156, now seen corresponding path program 3 times [2019-10-15 01:36:29,699 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:29,700 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487090995] [2019-10-15 01:36:29,700 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:29,700 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:29,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:29,736 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:29,737 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209637171] [2019-10-15 01:36:29,737 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:29,814 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:36:29,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:29,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-15 01:36:29,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-15 01:36:29,980 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:30,299 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-15 01:36:30,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487090995] [2019-10-15 01:36:30,300 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:30,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209637171] [2019-10-15 01:36:30,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [815439518] [2019-10-15 01:36:30,302 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:36:30,302 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:30,303 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:30,303 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:30,303 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:30,340 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:30,583 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2019-10-15 01:36:30,593 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:30,600 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:31,342 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:36:31,342 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 9] total 41 [2019-10-15 01:36:31,343 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896771729] [2019-10-15 01:36:31,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-15 01:36:31,344 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:31,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-15 01:36:31,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1089, Unknown=0, NotChecked=0, Total=1640 [2019-10-15 01:36:31,346 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 41 states. [2019-10-15 01:36:35,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:35,475 INFO L93 Difference]: Finished difference Result 194 states and 257 transitions. [2019-10-15 01:36:35,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-15 01:36:35,481 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2019-10-15 01:36:35,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:35,484 INFO L225 Difference]: With dead ends: 194 [2019-10-15 01:36:35,484 INFO L226 Difference]: Without dead ends: 170 [2019-10-15 01:36:35,487 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 66 SyntacticMatches, 15 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1936 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1642, Invalid=4058, Unknown=0, NotChecked=0, Total=5700 [2019-10-15 01:36:35,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-10-15 01:36:35,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 76. [2019-10-15 01:36:35,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-15 01:36:35,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2019-10-15 01:36:35,538 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 40 [2019-10-15 01:36:35,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:35,539 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2019-10-15 01:36:35,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-15 01:36:35,539 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2019-10-15 01:36:35,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-15 01:36:35,541 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:35,541 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:35,764 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:35,765 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:35,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:35,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1263983820, now seen corresponding path program 4 times [2019-10-15 01:36:35,766 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:35,767 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35356433] [2019-10-15 01:36:35,767 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:35,768 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:35,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:35,825 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:35,825 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867992261] [2019-10-15 01:36:35,826 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-15 01:36:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:35,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-15 01:36:35,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-10-15 01:36:36,347 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-10-15 01:36:37,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35356433] [2019-10-15 01:36:37,671 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:37,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867992261] [2019-10-15 01:36:37,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [613735445] [2019-10-15 01:36:37,673 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:36:37,673 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:37,673 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:37,673 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:37,674 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:37,711 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:37,933 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2019-10-15 01:36:37,940 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:37,943 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:39,272 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:36:39,272 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 9] total 73 [2019-10-15 01:36:39,272 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27760236] [2019-10-15 01:36:39,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-10-15 01:36:39,274 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:39,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-10-15 01:36:39,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2103, Invalid=3153, Unknown=0, NotChecked=0, Total=5256 [2019-10-15 01:36:39,278 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 73 states.