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/diff-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:36:39,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:36:39,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:36:39,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:36:39,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:36:39,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:36:39,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:36:39,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:36:39,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:36:39,629 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:36:39,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:36:39,631 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:36:39,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:36:39,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:36:39,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:36:39,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:36:39,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:36:39,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:36:39,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:36:39,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:36:39,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:36:39,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:36:39,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:36:39,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:36:39,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:36:39,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:36:39,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:36:39,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:36:39,656 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 01:36:39,670 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:36:39,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:36:39,671 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:36:39,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:36:39,672 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:36:39,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:36:39,672 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:36:39,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:36:39,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:36:39,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:36:39,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:36:39,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:36:39,673 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:36:39,674 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:36:39,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:36:39,674 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:36:39,674 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:36:39,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:36:39,675 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:36:39,675 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:36:39,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:36:39,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:36:39,675 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:36:39,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:36:39,676 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:36:39,676 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:36:39,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:36:39,676 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:36:39,677 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 01:36:39,937 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:36:39,952 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:36:39,956 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:36:39,957 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:36:39,957 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:36:39,958 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/diff-2-n-u.c [2019-10-15 01:36:40,034 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/498d3623f/35dacd35d1e747b3a5959e0dedeccd22/FLAG496a2b8b9 [2019-10-15 01:36:40,479 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:36:40,479 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/diff-2-n-u.c [2019-10-15 01:36:40,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/498d3623f/35dacd35d1e747b3a5959e0dedeccd22/FLAG496a2b8b9 [2019-10-15 01:36:40,861 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/498d3623f/35dacd35d1e747b3a5959e0dedeccd22 [2019-10-15 01:36:40,875 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:36:40,877 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:36:40,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:36:40,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:36:40,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:36:40,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:36:40" (1/1) ... [2019-10-15 01:36:40,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a266f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:40, skipping insertion in model container [2019-10-15 01:36:40,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:36:40" (1/1) ... [2019-10-15 01:36:40,896 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:36:40,916 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:36:41,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:36:41,103 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:36:41,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:36:41,148 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:36:41,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:41 WrapperNode [2019-10-15 01:36:41,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:36:41,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:36:41,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:36:41,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:36:41,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:41" (1/1) ... [2019-10-15 01:36:41,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:41" (1/1) ... [2019-10-15 01:36:41,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:41" (1/1) ... [2019-10-15 01:36:41,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:41" (1/1) ... [2019-10-15 01:36:41,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:41" (1/1) ... [2019-10-15 01:36:41,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:41" (1/1) ... [2019-10-15 01:36:41,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:41" (1/1) ... [2019-10-15 01:36:41,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:36:41,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:36:41,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:36:41,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:36:41,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:41" (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 01:36:41,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:36:41,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:36:41,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:36:41,313 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:36:41,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:36:41,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:36:41,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-15 01:36:41,314 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:36:41,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:36:41,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:36:41,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:36:41,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:36:41,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:36:41,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:36:41,757 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:36:41,757 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-15 01:36:41,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:36:41 BoogieIcfgContainer [2019-10-15 01:36:41,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:36:41,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:36:41,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:36:41,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:36:41,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:36:40" (1/3) ... [2019-10-15 01:36:41,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c5eecd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:36:41, skipping insertion in model container [2019-10-15 01:36:41,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:41" (2/3) ... [2019-10-15 01:36:41,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c5eecd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:36:41, skipping insertion in model container [2019-10-15 01:36:41,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:36:41" (3/3) ... [2019-10-15 01:36:41,766 INFO L109 eAbstractionObserver]: Analyzing ICFG diff-2-n-u.c [2019-10-15 01:36:41,776 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:36:41,783 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:36:41,794 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:36:41,816 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:36:41,816 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:36:41,816 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:36:41,817 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:36:41,817 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:36:41,817 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:36:41,817 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:36:41,817 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:36:41,830 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-15 01:36:41,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:36:41,836 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:41,836 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:41,838 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:41,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:41,842 INFO L82 PathProgramCache]: Analyzing trace with hash 60049518, now seen corresponding path program 1 times [2019-10-15 01:36:41,849 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:41,849 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451601174] [2019-10-15 01:36:41,849 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:41,850 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:41,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:41,921 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:41,921 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37581820] [2019-10-15 01:36:41,922 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 01:36:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:41,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:36:41,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:42,044 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 01:36:42,045 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:42,067 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 01:36:42,067 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451601174] [2019-10-15 01:36:42,068 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:42,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37581820] [2019-10-15 01:36:42,069 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:36:42,069 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-15 01:36:42,070 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099832087] [2019-10-15 01:36:42,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:36:42,074 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:42,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:36:42,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:36:42,087 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2019-10-15 01:36:42,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:42,186 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2019-10-15 01:36:42,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:36:42,188 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-15 01:36:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:42,197 INFO L225 Difference]: With dead ends: 44 [2019-10-15 01:36:42,197 INFO L226 Difference]: Without dead ends: 24 [2019-10-15 01:36:42,201 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 01:36:42,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-15 01:36:42,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-15 01:36:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:36:42,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2019-10-15 01:36:42,258 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 14 [2019-10-15 01:36:42,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:42,258 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2019-10-15 01:36:42,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:36:42,259 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2019-10-15 01:36:42,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:36:42,260 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:42,260 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:42,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:42,464 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:42,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:42,465 INFO L82 PathProgramCache]: Analyzing trace with hash 793182208, now seen corresponding path program 1 times [2019-10-15 01:36:42,466 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:42,466 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212393505] [2019-10-15 01:36:42,467 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:42,467 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:42,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:42,479 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:42,480 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285656237] [2019-10-15 01:36:42,480 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 01:36:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:42,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:36:42,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:42,570 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 01:36:42,570 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:42,601 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 01:36:42,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212393505] [2019-10-15 01:36:42,601 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:42,602 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285656237] [2019-10-15 01:36:42,602 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:36:42,602 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:36:42,603 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36889957] [2019-10-15 01:36:42,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:36:42,605 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:42,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:36:42,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:36:42,606 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 6 states. [2019-10-15 01:36:42,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:42,747 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2019-10-15 01:36:42,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:36:42,747 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-10-15 01:36:42,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:42,750 INFO L225 Difference]: With dead ends: 56 [2019-10-15 01:36:42,751 INFO L226 Difference]: Without dead ends: 39 [2019-10-15 01:36:42,752 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 01:36:42,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-15 01:36:42,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2019-10-15 01:36:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 01:36:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2019-10-15 01:36:42,765 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2019-10-15 01:36:42,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:42,766 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2019-10-15 01:36:42,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:36:42,766 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2019-10-15 01:36:42,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-15 01:36:42,768 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:42,768 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:42,975 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:42,976 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:42,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:42,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1989033728, now seen corresponding path program 1 times [2019-10-15 01:36:42,977 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:42,977 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156392420] [2019-10-15 01:36:42,977 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:42,977 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:42,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:42,988 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:42,989 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739224362] [2019-10-15 01:36:42,989 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 01:36:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:43,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:36:43,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:36:43,105 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:36:43,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156392420] [2019-10-15 01:36:43,147 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:43,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739224362] [2019-10-15 01:36:43,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1614353998] [2019-10-15 01:36:43,171 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:36:43,172 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:43,178 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:43,185 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:43,186 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:43,364 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:44,084 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2019-10-15 01:36:44,090 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:44,096 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:44,411 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2019-10-15 01:36:44,485 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:36:44,485 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 6] total 18 [2019-10-15 01:36:44,485 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488729387] [2019-10-15 01:36:44,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 01:36:44,487 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:44,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 01:36:44,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:36:44,488 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 10 states. [2019-10-15 01:36:44,724 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2019-10-15 01:36:44,950 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2019-10-15 01:36:45,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:45,221 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2019-10-15 01:36:45,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-15 01:36:45,222 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-10-15 01:36:45,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:45,223 INFO L225 Difference]: With dead ends: 64 [2019-10-15 01:36:45,224 INFO L226 Difference]: Without dead ends: 44 [2019-10-15 01:36:45,226 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:36:45,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-15 01:36:45,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2019-10-15 01:36:45,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-15 01:36:45,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2019-10-15 01:36:45,240 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 22 [2019-10-15 01:36:45,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:45,241 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2019-10-15 01:36:45,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-15 01:36:45,241 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2019-10-15 01:36:45,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-15 01:36:45,242 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:45,242 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:45,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:45,447 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:45,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:45,447 INFO L82 PathProgramCache]: Analyzing trace with hash 313530172, now seen corresponding path program 1 times [2019-10-15 01:36:45,447 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:45,448 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084772664] [2019-10-15 01:36:45,448 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:45,449 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:45,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:45,458 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:45,458 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409317997] [2019-10-15 01:36:45,458 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 01:36:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:45,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:36:45,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:36:45,549 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:36:45,581 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084772664] [2019-10-15 01:36:45,581 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:45,581 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409317997] [2019-10-15 01:36:45,581 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1064973012] [2019-10-15 01:36:45,583 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:36:45,584 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:45,584 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:45,585 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:45,585 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:45,618 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:46,708 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2019-10-15 01:36:46,716 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:46,723 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:47,066 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2019-10-15 01:36:49,440 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:36:49,441 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 15] total 24 [2019-10-15 01:36:49,441 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901912523] [2019-10-15 01:36:49,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 01:36:49,442 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:49,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 01:36:49,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=464, Unknown=1, NotChecked=0, Total=552 [2019-10-15 01:36:49,443 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 24 states. [2019-10-15 01:36:49,761 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2019-10-15 01:36:51,567 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2019-10-15 01:37:04,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:04,984 INFO L93 Difference]: Finished difference Result 107 states and 148 transitions. [2019-10-15 01:37:04,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 01:37:04,984 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 30 [2019-10-15 01:37:04,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:04,985 INFO L225 Difference]: With dead ends: 107 [2019-10-15 01:37:04,985 INFO L226 Difference]: Without dead ends: 78 [2019-10-15 01:37:04,987 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=323, Invalid=1235, Unknown=2, NotChecked=0, Total=1560 [2019-10-15 01:37:04,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-15 01:37:05,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2019-10-15 01:37:05,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-15 01:37:05,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2019-10-15 01:37:05,004 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 30 [2019-10-15 01:37:05,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:05,004 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2019-10-15 01:37:05,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 01:37:05,005 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2019-10-15 01:37:05,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-15 01:37:05,006 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:05,006 INFO L380 BasicCegarLoop]: trace histogram [12, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:05,207 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:05,208 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:05,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:05,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1104473412, now seen corresponding path program 2 times [2019-10-15 01:37:05,209 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:05,209 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878287454] [2019-10-15 01:37:05,209 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:05,210 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:05,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:05,219 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:05,219 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209935858] [2019-10-15 01:37:05,219 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 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 01:37:05,305 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:37:05,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:05,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:37:05,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2019-10-15 01:37:05,340 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2019-10-15 01:37:05,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878287454] [2019-10-15 01:37:05,375 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:05,375 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209935858] [2019-10-15 01:37:05,375 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1212567489] [2019-10-15 01:37:05,378 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:37:05,379 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:05,379 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:05,379 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:05,380 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:05,409 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:06,250 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2019-10-15 01:37:06,256 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:06,259 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:06,565 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2019-10-15 01:37:08,882 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:08,883 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 15] total 22 [2019-10-15 01:37:08,883 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273895387] [2019-10-15 01:37:08,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:37:08,884 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:08,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:37:08,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=388, Unknown=1, NotChecked=0, Total=462 [2019-10-15 01:37:08,885 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand 22 states. [2019-10-15 01:37:09,177 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2019-10-15 01:37:10,398 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2019-10-15 01:37:10,674 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2019-10-15 01:37:10,991 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2019-10-15 01:37:11,310 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2019-10-15 01:37:14,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:14,861 INFO L93 Difference]: Finished difference Result 248 states and 308 transitions. [2019-10-15 01:37:14,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-15 01:37:14,862 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 46 [2019-10-15 01:37:14,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:14,864 INFO L225 Difference]: With dead ends: 248 [2019-10-15 01:37:14,864 INFO L226 Difference]: Without dead ends: 197 [2019-10-15 01:37:14,868 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=269, Invalid=1062, Unknown=1, NotChecked=0, Total=1332 [2019-10-15 01:37:14,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-10-15 01:37:14,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 137. [2019-10-15 01:37:14,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-10-15 01:37:14,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 159 transitions. [2019-10-15 01:37:14,925 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 159 transitions. Word has length 46 [2019-10-15 01:37:14,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:14,926 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 159 transitions. [2019-10-15 01:37:14,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:37:14,926 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 159 transitions. [2019-10-15 01:37:14,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-15 01:37:14,937 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:14,938 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 24, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:15,141 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:15,142 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:15,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:15,143 INFO L82 PathProgramCache]: Analyzing trace with hash 2012444802, now seen corresponding path program 3 times [2019-10-15 01:37:15,143 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:15,143 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957550681] [2019-10-15 01:37:15,144 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:15,144 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:15,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:15,163 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:15,163 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249472721] [2019-10-15 01:37:15,163 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 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