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/add-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:36:30,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:36:30,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:36:30,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:36:30,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:36:30,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:36:30,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:36:30,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:36:30,418 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:36:30,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:36:30,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:36:30,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:36:30,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:36:30,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:36:30,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:36:30,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:36:30,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:36:30,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:36:30,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:36:30,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:36:30,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:36:30,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:36:30,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:36:30,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:36:30,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:36:30,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:36:30,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:36:30,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:36:30,464 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:36:30,492 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:36:30,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:36:30,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:36:30,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:36:30,494 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:36:30,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:36:30,495 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:36:30,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:36:30,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:36:30,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:36:30,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:36:30,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:36:30,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:36:30,496 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:36:30,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:36:30,497 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:36:30,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:36:30,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:36:30,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:36:30,497 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:36:30,498 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:36:30,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:36:30,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:36:30,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:36:30,498 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:36:30,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:36:30,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:36:30,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:36:30,499 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:36:30,768 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:36:30,782 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:36:30,786 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:36:30,787 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:36:30,787 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:36:30,788 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/add-3-n-u.c [2019-10-15 01:36:30,868 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/473b18988/08498df21086459f88fc1e58a78b054f/FLAG518b50ab9 [2019-10-15 01:36:31,357 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:36:31,358 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/add-3-n-u.c [2019-10-15 01:36:31,366 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/473b18988/08498df21086459f88fc1e58a78b054f/FLAG518b50ab9 [2019-10-15 01:36:31,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/473b18988/08498df21086459f88fc1e58a78b054f [2019-10-15 01:36:31,728 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:36:31,729 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:36:31,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:36:31,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:36:31,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:36:31,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:36:31" (1/1) ... [2019-10-15 01:36:31,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51fe3b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:31, skipping insertion in model container [2019-10-15 01:36:31,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:36:31" (1/1) ... [2019-10-15 01:36:31,748 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:36:31,769 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:36:31,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:36:31,946 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:36:31,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:36:32,089 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:36:32,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32 WrapperNode [2019-10-15 01:36:32,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:36:32,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:36:32,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:36:32,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:36:32,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:32,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:32,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:32,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:32,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:32,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:32,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:32,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:36:32,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:36:32,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:36:32,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:36:32,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:36:32,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:36:32,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:36:32,202 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:36:32,202 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:36:32,202 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:36:32,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:36:32,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-15 01:36:32,203 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:36:32,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:36:32,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:36:32,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:36:32,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:36:32,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:36:32,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:36:32,687 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:36:32,688 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-15 01:36:32,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:36:32 BoogieIcfgContainer [2019-10-15 01:36:32,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:36:32,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:36:32,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:36:32,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:36:32,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:36:31" (1/3) ... [2019-10-15 01:36:32,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8d73c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:36:32, skipping insertion in model container [2019-10-15 01:36:32,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (2/3) ... [2019-10-15 01:36:32,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8d73c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:36:32, skipping insertion in model container [2019-10-15 01:36:32,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:36:32" (3/3) ... [2019-10-15 01:36:32,701 INFO L109 eAbstractionObserver]: Analyzing ICFG add-3-n-u.c [2019-10-15 01:36:32,712 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:36:32,720 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:36:32,731 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:36:32,763 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:36:32,763 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:36:32,763 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:36:32,763 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:36:32,763 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:36:32,764 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:36:32,764 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:36:32,764 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:36:32,787 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-10-15 01:36:32,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:36:32,793 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:32,795 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:32,797 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:32,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:32,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1983439941, now seen corresponding path program 1 times [2019-10-15 01:36:32,813 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:32,813 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027733028] [2019-10-15 01:36:32,813 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:32,814 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:32,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:32,897 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:32,898 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634081800] [2019-10-15 01:36:32,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:32,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:36:32,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:36:33,052 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:36:33,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027733028] [2019-10-15 01:36:33,078 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:33,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634081800] [2019-10-15 01:36:33,080 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:36:33,080 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-15 01:36:33,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213870563] [2019-10-15 01:36:33,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:36:33,086 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:33,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:36:33,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:36:33,110 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 4 states. [2019-10-15 01:36:33,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:33,212 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2019-10-15 01:36:33,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:36:33,216 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-15 01:36:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:33,236 INFO L225 Difference]: With dead ends: 46 [2019-10-15 01:36:33,237 INFO L226 Difference]: Without dead ends: 26 [2019-10-15 01:36:33,248 INFO L600 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 [2019-10-15 01:36:33,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-15 01:36:33,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-15 01:36:33,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-15 01:36:33,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2019-10-15 01:36:33,305 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 14 [2019-10-15 01:36:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:33,306 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2019-10-15 01:36:33,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:36:33,307 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-10-15 01:36:33,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:36:33,308 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:33,309 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:33,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:33,523 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:33,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:33,524 INFO L82 PathProgramCache]: Analyzing trace with hash -443111631, now seen corresponding path program 1 times [2019-10-15 01:36:33,524 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:33,524 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290589106] [2019-10-15 01:36:33,524 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:33,525 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:33,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:33,541 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:33,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861825236] [2019-10-15 01:36:33,542 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 01:36:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:33,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:36:33,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:33,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:36:33,633 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:36:33,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290589106] [2019-10-15 01:36:33,672 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:33,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861825236] [2019-10-15 01:36:33,673 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:36:33,673 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:36:33,673 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805041724] [2019-10-15 01:36:33,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:36:33,676 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:33,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:36:33,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:36:33,677 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2019-10-15 01:36:33,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:33,846 INFO L93 Difference]: Finished difference Result 60 states and 92 transitions. [2019-10-15 01:36:33,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:36:33,847 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-10-15 01:36:33,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:33,862 INFO L225 Difference]: With dead ends: 60 [2019-10-15 01:36:33,862 INFO L226 Difference]: Without dead ends: 42 [2019-10-15 01:36:33,863 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:36:33,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-15 01:36:33,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2019-10-15 01:36:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-15 01:36:33,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 55 transitions. [2019-10-15 01:36:33,878 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 55 transitions. Word has length 18 [2019-10-15 01:36:33,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:33,878 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 55 transitions. [2019-10-15 01:36:33,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:36:33,878 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 55 transitions. [2019-10-15 01:36:33,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 01:36:33,880 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:33,880 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:34,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:34,084 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:34,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:34,085 INFO L82 PathProgramCache]: Analyzing trace with hash -382183475, now seen corresponding path program 1 times [2019-10-15 01:36:34,085 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:34,086 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926610198] [2019-10-15 01:36:34,086 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:34,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:34,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:34,095 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:34,096 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169046862] [2019-10-15 01:36:34,096 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 [2019-10-15 01:36:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:34,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:36:34,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:36:34,192 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:36:34,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926610198] [2019-10-15 01:36:34,225 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:34,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169046862] [2019-10-15 01:36:34,225 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:36:34,225 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:36:34,226 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432687005] [2019-10-15 01:36:34,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:36:34,227 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:34,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:36:34,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:36:34,227 INFO L87 Difference]: Start difference. First operand 40 states and 55 transitions. Second operand 6 states. [2019-10-15 01:36:34,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:34,356 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2019-10-15 01:36:34,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:36:34,356 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-10-15 01:36:34,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:34,358 INFO L225 Difference]: With dead ends: 94 [2019-10-15 01:36:34,358 INFO L226 Difference]: Without dead ends: 62 [2019-10-15 01:36:34,359 INFO L600 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 [2019-10-15 01:36:34,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-15 01:36:34,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2019-10-15 01:36:34,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-15 01:36:34,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2019-10-15 01:36:34,374 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 26 [2019-10-15 01:36:34,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:34,374 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2019-10-15 01:36:34,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:36:34,374 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2019-10-15 01:36:34,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-15 01:36:34,376 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:34,376 INFO L380 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:34,586 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:34,586 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:34,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:34,586 INFO L82 PathProgramCache]: Analyzing trace with hash -6234035, now seen corresponding path program 1 times [2019-10-15 01:36:34,587 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:34,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655127938] [2019-10-15 01:36:34,587 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:34,587 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:34,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:34,597 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:34,597 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803866988] [2019-10-15 01:36:34,597 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 [2019-10-15 01:36:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:34,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:36:34,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-15 01:36:34,704 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-15 01:36:34,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655127938] [2019-10-15 01:36:34,745 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:34,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803866988] [2019-10-15 01:36:34,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [60065829] [2019-10-15 01:36:34,774 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:36:34,774 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:34,781 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:34,792 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:34,793 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:34,984 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:40,041 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2019-10-15 01:36:40,054 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:40,075 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:40,342 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:36:40,343 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 6] total 18 [2019-10-15 01:36:40,343 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635007963] [2019-10-15 01:36:40,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 01:36:40,346 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:40,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 01:36:40,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:36:40,347 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand 10 states. [2019-10-15 01:36:40,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:40,814 INFO L93 Difference]: Finished difference Result 93 states and 118 transitions. [2019-10-15 01:36:40,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-15 01:36:40,814 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-10-15 01:36:40,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:40,816 INFO L225 Difference]: With dead ends: 93 [2019-10-15 01:36:40,816 INFO L226 Difference]: Without dead ends: 68 [2019-10-15 01:36:40,817 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:36:40,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-15 01:36:40,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2019-10-15 01:36:40,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-15 01:36:40,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2019-10-15 01:36:40,834 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 34 [2019-10-15 01:36:40,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:40,834 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2019-10-15 01:36:40,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-15 01:36:40,835 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2019-10-15 01:36:40,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 01:36:40,836 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:40,836 INFO L380 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:41,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:41,041 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:41,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:41,042 INFO L82 PathProgramCache]: Analyzing trace with hash -569083224, now seen corresponding path program 1 times [2019-10-15 01:36:41,043 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:41,043 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369119352] [2019-10-15 01:36:41,044 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:41,044 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:41,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:41,053 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:41,053 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554896660] [2019-10-15 01:36:41,053 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 [2019-10-15 01:36:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:41,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:36:41,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 01:36:41,170 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 01:36:41,205 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369119352] [2019-10-15 01:36:41,205 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:41,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554896660] [2019-10-15 01:36:41,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1746656009] [2019-10-15 01:36:41,208 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:36:41,208 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:41,208 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:41,209 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:41,209 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:41,239 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:43,561 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2019-10-15 01:36:43,567 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:43,570 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:46,379 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:36:46,380 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 17] total 26 [2019-10-15 01:36:46,380 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335812524] [2019-10-15 01:36:46,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 01:36:46,381 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:46,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 01:36:46,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=549, Unknown=1, NotChecked=0, Total=650 [2019-10-15 01:36:46,382 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand 26 states. [2019-10-15 01:36:58,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:58,296 INFO L93 Difference]: Finished difference Result 173 states and 246 transitions. [2019-10-15 01:36:58,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-15 01:36:58,297 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2019-10-15 01:36:58,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:58,298 INFO L225 Difference]: With dead ends: 173 [2019-10-15 01:36:58,298 INFO L226 Difference]: Without dead ends: 122 [2019-10-15 01:36:58,302 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=394, Invalid=1496, Unknown=2, NotChecked=0, Total=1892 [2019-10-15 01:36:58,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-10-15 01:36:58,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2019-10-15 01:36:58,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-15 01:36:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 143 transitions. [2019-10-15 01:36:58,343 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 143 transitions. Word has length 44 [2019-10-15 01:36:58,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:58,344 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 143 transitions. [2019-10-15 01:36:58,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 01:36:58,344 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 143 transitions. [2019-10-15 01:36:58,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-15 01:36:58,348 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:58,348 INFO L380 BasicCegarLoop]: trace histogram [24, 12, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:58,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:58,549 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:58,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:58,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1677456936, now seen corresponding path program 2 times [2019-10-15 01:36:58,550 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:58,550 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431174070] [2019-10-15 01:36:58,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:58,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:58,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:58,567 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:58,567 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719935110] [2019-10-15 01:36:58,567 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 [2019-10-15 01:36:58,669 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:36:58,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:58,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:36:58,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:58,714 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2019-10-15 01:36:58,714 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:58,749 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2019-10-15 01:36:58,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431174070] [2019-10-15 01:36:58,750 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:58,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719935110] [2019-10-15 01:36:58,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [960668222] [2019-10-15 01:36:58,753 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:36:58,754 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:58,754 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:58,755 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:58,755 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:58,778 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:02,712 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2019-10-15 01:37:02,717 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:02,720 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:03,377 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:03,377 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 17] total 24 [2019-10-15 01:37:03,377 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839320104] [2019-10-15 01:37:03,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 01:37:03,378 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:03,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 01:37:03,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:37:03,379 INFO L87 Difference]: Start difference. First operand 117 states and 143 transitions. Second operand 24 states.