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/rev-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:37:20,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:37:20,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:37:20,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:37:20,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:37:20,909 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:37:20,911 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:37:20,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:37:20,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:37:20,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:37:20,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:37:20,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:37:20,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:37:20,935 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:37:20,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:37:20,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:37:20,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:37:20,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:37:20,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:37:20,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:37:20,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:37:20,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:37:20,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:37:20,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:37:20,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:37:20,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:37:20,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:37:20,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:37:20,980 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 01:37:21,004 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:37:21,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:37:21,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:37:21,011 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:37:21,011 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:37:21,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:37:21,011 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:37:21,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:37:21,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:37:21,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:37:21,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:37:21,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:37:21,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:37:21,012 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:37:21,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:37:21,013 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:37:21,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:37:21,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:37:21,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:37:21,013 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:37:21,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:37:21,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:37:21,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:37:21,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:37:21,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:37:21,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:37:21,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:37:21,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:37:21,015 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 01:37:21,307 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:37:21,320 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:37:21,324 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:37:21,326 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:37:21,326 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:37:21,327 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/rev-3-u.c [2019-10-15 01:37:21,391 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b4619d88/351e5fd12e9f42eeabaa992a144d9bb0/FLAGaab35fa12 [2019-10-15 01:37:21,812 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:37:21,812 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/rev-3-u.c [2019-10-15 01:37:21,819 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b4619d88/351e5fd12e9f42eeabaa992a144d9bb0/FLAGaab35fa12 [2019-10-15 01:37:22,232 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b4619d88/351e5fd12e9f42eeabaa992a144d9bb0 [2019-10-15 01:37:22,244 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:37:22,246 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:37:22,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:37:22,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:37:22,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:37:22,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:37:22" (1/1) ... [2019-10-15 01:37:22,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15161af2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:22, skipping insertion in model container [2019-10-15 01:37:22,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:37:22" (1/1) ... [2019-10-15 01:37:22,264 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:37:22,284 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:37:22,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:37:22,535 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:37:22,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:37:22,681 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:37:22,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:22 WrapperNode [2019-10-15 01:37:22,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:37:22,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:37:22,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:37:22,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:37:22,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:22" (1/1) ... [2019-10-15 01:37:22,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:22" (1/1) ... [2019-10-15 01:37:22,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:22" (1/1) ... [2019-10-15 01:37:22,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:22" (1/1) ... [2019-10-15 01:37:22,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:22" (1/1) ... [2019-10-15 01:37:22,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:22" (1/1) ... [2019-10-15 01:37:22,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:22" (1/1) ... [2019-10-15 01:37:22,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:37:22,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:37:22,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:37:22,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:37:22,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:22" (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 01:37:22,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:37:22,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:37:22,787 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:37:22,787 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:37:22,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:37:22,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:37:22,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:37:22,787 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:37:22,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:37:22,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:37:22,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:37:22,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:37:22,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:37:22,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:37:23,295 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:37:23,296 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-15 01:37:23,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:37:23 BoogieIcfgContainer [2019-10-15 01:37:23,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:37:23,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:37:23,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:37:23,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:37:23,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:37:22" (1/3) ... [2019-10-15 01:37:23,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c3717e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:37:23, skipping insertion in model container [2019-10-15 01:37:23,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:22" (2/3) ... [2019-10-15 01:37:23,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c3717e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:37:23, skipping insertion in model container [2019-10-15 01:37:23,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:37:23" (3/3) ... [2019-10-15 01:37:23,306 INFO L109 eAbstractionObserver]: Analyzing ICFG rev-3-u.c [2019-10-15 01:37:23,316 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:37:23,324 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:37:23,335 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:37:23,357 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:37:23,358 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:37:23,358 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:37:23,358 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:37:23,358 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:37:23,359 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:37:23,359 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:37:23,359 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:37:23,375 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-10-15 01:37:23,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:37:23,380 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:23,381 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:23,383 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:23,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:23,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1848676113, now seen corresponding path program 1 times [2019-10-15 01:37:23,394 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:23,395 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980953461] [2019-10-15 01:37:23,395 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:23,395 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:23,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:23,466 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:23,466 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185851754] [2019-10-15 01:37:23,467 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 01:37:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:23,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:23,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:23,600 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 01:37:23,601 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:23,631 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 01:37:23,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980953461] [2019-10-15 01:37:23,632 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:23,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185851754] [2019-10-15 01:37:23,633 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:23,633 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-15 01:37:23,634 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574878160] [2019-10-15 01:37:23,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:37:23,639 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:23,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:37:23,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:37:23,658 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 4 states. [2019-10-15 01:37:23,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:23,788 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2019-10-15 01:37:23,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:37:23,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-15 01:37:23,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:23,803 INFO L225 Difference]: With dead ends: 46 [2019-10-15 01:37:23,804 INFO L226 Difference]: Without dead ends: 26 [2019-10-15 01:37:23,809 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 01:37:23,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-15 01:37:23,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-15 01:37:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-15 01:37:23,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2019-10-15 01:37:23,870 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 14 [2019-10-15 01:37:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:23,870 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2019-10-15 01:37:23,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:37:23,871 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-10-15 01:37:23,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:37:23,872 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:23,873 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:24,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:24,079 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:24,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:24,079 INFO L82 PathProgramCache]: Analyzing trace with hash -384845105, now seen corresponding path program 1 times [2019-10-15 01:37:24,080 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:24,080 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295162183] [2019-10-15 01:37:24,081 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:24,081 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:24,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:24,096 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:24,096 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089480381] [2019-10-15 01:37:24,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:37:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:24,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:24,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:24,211 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 01:37:24,212 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:24,243 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 01:37:24,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295162183] [2019-10-15 01:37:24,243 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:24,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089480381] [2019-10-15 01:37:24,244 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:24,244 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:37:24,244 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616798399] [2019-10-15 01:37:24,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:37:24,247 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:24,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:37:24,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:37:24,248 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2019-10-15 01:37:24,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:24,434 INFO L93 Difference]: Finished difference Result 60 states and 92 transitions. [2019-10-15 01:37:24,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:37:24,436 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-10-15 01:37:24,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:24,439 INFO L225 Difference]: With dead ends: 60 [2019-10-15 01:37:24,440 INFO L226 Difference]: Without dead ends: 42 [2019-10-15 01:37:24,453 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 01:37:24,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-15 01:37:24,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2019-10-15 01:37:24,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-15 01:37:24,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 55 transitions. [2019-10-15 01:37:24,467 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 55 transitions. Word has length 18 [2019-10-15 01:37:24,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:24,467 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 55 transitions. [2019-10-15 01:37:24,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:37:24,468 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 55 transitions. [2019-10-15 01:37:24,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 01:37:24,469 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:24,469 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 01:37:24,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:24,679 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:24,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:24,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1931678267, now seen corresponding path program 1 times [2019-10-15 01:37:24,681 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:24,682 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270635126] [2019-10-15 01:37:24,682 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:24,683 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:24,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:24,692 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:24,693 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015824084] [2019-10-15 01:37:24,701 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 01:37:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:24,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:24,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:24,795 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 01:37:24,796 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:24,848 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 01:37:24,849 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270635126] [2019-10-15 01:37:24,849 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:24,849 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015824084] [2019-10-15 01:37:24,850 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:24,850 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:37:24,850 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652342424] [2019-10-15 01:37:24,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:37:24,851 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:24,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:37:24,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:37:24,852 INFO L87 Difference]: Start difference. First operand 40 states and 55 transitions. Second operand 6 states. [2019-10-15 01:37:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:25,095 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2019-10-15 01:37:25,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:37:25,095 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-10-15 01:37:25,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:25,099 INFO L225 Difference]: With dead ends: 94 [2019-10-15 01:37:25,099 INFO L226 Difference]: Without dead ends: 62 [2019-10-15 01:37:25,100 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 01:37:25,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-15 01:37:25,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2019-10-15 01:37:25,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-15 01:37:25,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2019-10-15 01:37:25,136 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 26 [2019-10-15 01:37:25,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:25,137 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2019-10-15 01:37:25,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:37:25,137 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2019-10-15 01:37:25,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-15 01:37:25,139 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:25,139 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 01:37:25,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:25,353 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:25,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:25,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1212850107, now seen corresponding path program 1 times [2019-10-15 01:37:25,354 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:25,354 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915957411] [2019-10-15 01:37:25,355 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:25,355 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:25,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:25,364 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:25,365 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810714818] [2019-10-15 01:37:25,365 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 01:37:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:25,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:37:25,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:25,478 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 01:37:25,478 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:25,523 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 01:37:25,523 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915957411] [2019-10-15 01:37:25,523 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:25,524 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810714818] [2019-10-15 01:37:25,524 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1671760091] [2019-10-15 01:37:25,552 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:37:25,552 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:25,559 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:25,569 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:25,570 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:25,756 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:26,713 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:37:26,735 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:26,747 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:27,084 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2019-10-15 01:37:27,182 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:37:27,182 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 6] total 18 [2019-10-15 01:37:27,182 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343380558] [2019-10-15 01:37:27,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 01:37:27,184 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:27,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 01:37:27,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:37:27,185 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand 10 states. [2019-10-15 01:37:27,422 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2019-10-15 01:37:27,650 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2019-10-15 01:37:27,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:27,892 INFO L93 Difference]: Finished difference Result 93 states and 118 transitions. [2019-10-15 01:37:27,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-15 01:37:27,893 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-10-15 01:37:27,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:27,894 INFO L225 Difference]: With dead ends: 93 [2019-10-15 01:37:27,895 INFO L226 Difference]: Without dead ends: 68 [2019-10-15 01:37:27,896 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:37:27,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-15 01:37:27,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2019-10-15 01:37:27,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-15 01:37:27,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2019-10-15 01:37:27,926 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 34 [2019-10-15 01:37:27,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:27,926 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2019-10-15 01:37:27,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-15 01:37:27,927 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2019-10-15 01:37:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 01:37:27,931 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:27,932 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 01:37:28,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:28,141 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:28,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:28,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1540911104, now seen corresponding path program 1 times [2019-10-15 01:37:28,142 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:28,143 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384708683] [2019-10-15 01:37:28,143 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:28,143 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:28,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:28,156 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:28,156 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193201175] [2019-10-15 01:37:28,156 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 01:37:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:28,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:37:28,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:28,262 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 01:37:28,262 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:28,295 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 01:37:28,296 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384708683] [2019-10-15 01:37:28,296 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:28,296 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193201175] [2019-10-15 01:37:28,296 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [281339322] [2019-10-15 01:37:28,298 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:37:28,298 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:28,299 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:28,299 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:28,299 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:28,339 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:28,970 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2019-10-15 01:37:29,389 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2019-10-15 01:37:29,819 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2019-10-15 01:37:30,119 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2019-10-15 01:37:30,338 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2019-10-15 01:37:30,345 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:30,348 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:30,705 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2019-10-15 01:37:31,136 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:31,136 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 16] total 25 [2019-10-15 01:37:31,136 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192935399] [2019-10-15 01:37:31,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:37:31,138 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:31,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:37:31,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:37:31,139 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand 25 states. [2019-10-15 01:37:31,385 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2019-10-15 01:37:32,178 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2019-10-15 01:37:33,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:33,141 INFO L93 Difference]: Finished difference Result 173 states and 246 transitions. [2019-10-15 01:37:33,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:37:33,142 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 44 [2019-10-15 01:37:33,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:33,143 INFO L225 Difference]: With dead ends: 173 [2019-10-15 01:37:33,143 INFO L226 Difference]: Without dead ends: 122 [2019-10-15 01:37:33,145 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=358, Invalid=1364, Unknown=0, NotChecked=0, Total=1722 [2019-10-15 01:37:33,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-10-15 01:37:33,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2019-10-15 01:37:33,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-15 01:37:33,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 143 transitions. [2019-10-15 01:37:33,166 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 143 transitions. Word has length 44 [2019-10-15 01:37:33,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:33,167 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 143 transitions. [2019-10-15 01:37:33,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 01:37:33,167 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 143 transitions. [2019-10-15 01:37:33,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-15 01:37:33,168 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:33,168 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 01:37:33,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:33,382 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:33,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:33,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1062993536, now seen corresponding path program 2 times [2019-10-15 01:37:33,383 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:33,383 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623427698] [2019-10-15 01:37:33,384 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:33,384 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:33,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:33,413 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:33,413 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198423897] [2019-10-15 01:37:33,413 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 01:37:33,503 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:37:33,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:33,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:37:33,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:33,562 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 01:37:33,563 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:33,601 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 01:37:33,602 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623427698] [2019-10-15 01:37:33,602 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:33,602 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198423897] [2019-10-15 01:37:33,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1209538076] [2019-10-15 01:37:33,607 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:37:33,607 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:33,609 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:33,609 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:33,609 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:33,637 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:34,158 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2019-10-15 01:37:34,486 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2019-10-15 01:37:34,818 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2019-10-15 01:37:35,097 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2019-10-15 01:37:35,282 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2019-10-15 01:37:35,289 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:35,294 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:35,649 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2019-10-15 01:37:36,022 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:36,022 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 16] total 23 [2019-10-15 01:37:36,022 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173895476] [2019-10-15 01:37:36,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:37:36,024 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:36,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:37:36,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:37:36,024 INFO L87 Difference]: Start difference. First operand 117 states and 143 transitions. Second operand 23 states. [2019-10-15 01:37:36,264 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2019-10-15 01:37:36,669 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2019-10-15 01:37:37,024 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2019-10-15 01:37:37,422 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2019-10-15 01:37:37,775 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2019-10-15 01:37:38,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:38,573 INFO L93 Difference]: Finished difference Result 407 states and 515 transitions. [2019-10-15 01:37:38,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-15 01:37:38,574 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 68 [2019-10-15 01:37:38,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:38,577 INFO L225 Difference]: With dead ends: 407 [2019-10-15 01:37:38,577 INFO L226 Difference]: Without dead ends: 332 [2019-10-15 01:37:38,579 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=368, Invalid=1354, Unknown=0, NotChecked=0, Total=1722 [2019-10-15 01:37:38,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2019-10-15 01:37:38,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 207. [2019-10-15 01:37:38,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-10-15 01:37:38,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 248 transitions. [2019-10-15 01:37:38,621 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 248 transitions. Word has length 68 [2019-10-15 01:37:38,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:38,621 INFO L462 AbstractCegarLoop]: Abstraction has 207 states and 248 transitions. [2019-10-15 01:37:38,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:37:38,621 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 248 transitions. [2019-10-15 01:37:38,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-15 01:37:38,624 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:38,624 INFO L380 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:38,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:38,828 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:38,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:38,828 INFO L82 PathProgramCache]: Analyzing trace with hash 615518747, now seen corresponding path program 3 times [2019-10-15 01:37:38,828 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:38,828 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201275694] [2019-10-15 01:37:38,828 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:38,829 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:38,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:38,841 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:38,842 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178985575] [2019-10-15 01:37:38,842 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:39,034 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:37:39,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:39,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 01:37:39,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3232 backedges. 181 proven. 667 refuted. 0 times theorem prover too weak. 2384 trivial. 0 not checked. [2019-10-15 01:37:39,116 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3232 backedges. 181 proven. 667 refuted. 0 times theorem prover too weak. 2384 trivial. 0 not checked. [2019-10-15 01:37:39,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201275694] [2019-10-15 01:37:39,193 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:39,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178985575] [2019-10-15 01:37:39,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [261617348] [2019-10-15 01:37:39,195 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:37:39,195 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:39,196 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:39,196 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:39,196 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:39,219 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:39,688 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2019-10-15 01:37:40,020 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2019-10-15 01:37:40,311 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2019-10-15 01:37:40,626 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2019-10-15 01:37:40,810 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2019-10-15 01:37:40,817 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:40,827 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:41,198 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2019-10-15 01:37:41,608 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:41,608 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 16] total 27 [2019-10-15 01:37:41,608 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9306648] [2019-10-15 01:37:41,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-15 01:37:41,610 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:41,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-15 01:37:41,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2019-10-15 01:37:41,611 INFO L87 Difference]: Start difference. First operand 207 states and 248 transitions. Second operand 27 states. [2019-10-15 01:37:41,912 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2019-10-15 01:37:44,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:44,179 INFO L93 Difference]: Finished difference Result 599 states and 721 transitions. [2019-10-15 01:37:44,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-15 01:37:44,179 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 158 [2019-10-15 01:37:44,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:44,183 INFO L225 Difference]: With dead ends: 599 [2019-10-15 01:37:44,183 INFO L226 Difference]: Without dead ends: 382 [2019-10-15 01:37:44,186 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 450 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=464, Invalid=2086, Unknown=0, NotChecked=0, Total=2550 [2019-10-15 01:37:44,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2019-10-15 01:37:44,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 303. [2019-10-15 01:37:44,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2019-10-15 01:37:44,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 363 transitions. [2019-10-15 01:37:44,234 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 363 transitions. Word has length 158 [2019-10-15 01:37:44,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:44,235 INFO L462 AbstractCegarLoop]: Abstraction has 303 states and 363 transitions. [2019-10-15 01:37:44,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-15 01:37:44,235 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 363 transitions. [2019-10-15 01:37:44,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-10-15 01:37:44,238 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:44,239 INFO L380 BasicCegarLoop]: trace histogram [72, 66, 12, 12, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:44,445 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:44,446 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:44,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:44,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1496381875, now seen corresponding path program 4 times [2019-10-15 01:37:44,447 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:44,447 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062722514] [2019-10-15 01:37:44,447 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:44,448 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:44,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:44,461 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:44,462 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348559264] [2019-10-15 01:37:44,462 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:44,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:37:44,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6657 backedges. 558 proven. 21 refuted. 0 times theorem prover too weak. 6078 trivial. 0 not checked. [2019-10-15 01:37:44,838 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6657 backedges. 558 proven. 21 refuted. 0 times theorem prover too weak. 6078 trivial. 0 not checked. [2019-10-15 01:37:45,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062722514] [2019-10-15 01:37:45,042 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:45,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348559264] [2019-10-15 01:37:45,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2047150614] [2019-10-15 01:37:45,047 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:37:45,047 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:45,048 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:45,048 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:45,048 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:45,081 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:45,547 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2019-10-15 01:37:45,949 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2019-10-15 01:37:46,384 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2019-10-15 01:37:46,727 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2019-10-15 01:37:46,956 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2019-10-15 01:37:46,962 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:46,964 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:47,300 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2019-10-15 01:37:47,660 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:47,660 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 16] total 33 [2019-10-15 01:37:47,660 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879036853] [2019-10-15 01:37:47,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-15 01:37:47,662 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:47,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-15 01:37:47,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2019-10-15 01:37:47,663 INFO L87 Difference]: Start difference. First operand 303 states and 363 transitions. Second operand 33 states. [2019-10-15 01:37:47,919 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2019-10-15 01:37:49,277 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2019-10-15 01:37:51,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:51,086 INFO L93 Difference]: Finished difference Result 860 states and 1218 transitions. [2019-10-15 01:37:51,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-15 01:37:51,086 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 214 [2019-10-15 01:37:51,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:51,089 INFO L225 Difference]: With dead ends: 860 [2019-10-15 01:37:51,090 INFO L226 Difference]: Without dead ends: 571 [2019-10-15 01:37:51,092 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 613 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=754, Invalid=2552, Unknown=0, NotChecked=0, Total=3306 [2019-10-15 01:37:51,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2019-10-15 01:37:51,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 567. [2019-10-15 01:37:51,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2019-10-15 01:37:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 651 transitions. [2019-10-15 01:37:51,153 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 651 transitions. Word has length 214 [2019-10-15 01:37:51,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:51,153 INFO L462 AbstractCegarLoop]: Abstraction has 567 states and 651 transitions. [2019-10-15 01:37:51,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-15 01:37:51,154 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 651 transitions. [2019-10-15 01:37:51,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2019-10-15 01:37:51,161 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:51,161 INFO L380 BasicCegarLoop]: trace histogram [168, 154, 12, 12, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:51,365 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:51,366 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:51,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:51,367 INFO L82 PathProgramCache]: Analyzing trace with hash -870746675, now seen corresponding path program 5 times [2019-10-15 01:37:51,367 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:51,367 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273002799] [2019-10-15 01:37:51,367 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:51,368 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:51,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:51,391 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:51,391 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508299085] [2019-10-15 01:37:51,391 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true