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-f4eb214f-m [2019-10-13 21:37:31,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:37:31,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:37:31,280 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:37:31,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:37:31,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:37:31,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:37:31,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:37:31,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:37:31,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:37:31,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:37:31,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:37:31,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:37:31,309 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:37:31,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:37:31,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:37:31,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:37:31,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:37:31,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:37:31,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:37:31,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:37:31,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:37:31,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:37:31,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:37:31,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:37:31,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:37:31,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:37:31,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:37:31,351 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 [2019-10-13 21:37:31,386 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:37:31,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:37:31,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:37:31,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:37:31,392 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:37:31,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:37:31,392 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:37:31,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:37:31,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:37:31,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:37:31,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:37:31,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:37:31,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:37:31,394 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:37:31,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:37:31,394 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:37:31,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:37:31,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:37:31,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:37:31,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:37:31,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:37:31,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:37:31,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:37:31,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:37:31,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:37:31,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:37:31,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:37:31,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:37:31,398 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 [2019-10-13 21:37:31,708 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:37:31,722 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:37:31,725 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:37:31,727 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:37:31,728 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:37:31,729 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/diff-2-n-u.c [2019-10-13 21:37:31,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65f36c0c1/9be775a6d2d14d6e8eb9789ddf2ee6b2/FLAGd7389e402 [2019-10-13 21:37:32,263 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:37:32,264 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/diff-2-n-u.c [2019-10-13 21:37:32,271 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65f36c0c1/9be775a6d2d14d6e8eb9789ddf2ee6b2/FLAGd7389e402 [2019-10-13 21:37:32,598 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65f36c0c1/9be775a6d2d14d6e8eb9789ddf2ee6b2 [2019-10-13 21:37:32,608 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:37:32,610 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:37:32,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:37:32,611 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:37:32,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:37:32,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:37:32" (1/1) ... [2019-10-13 21:37:32,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77f79b02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:32, skipping insertion in model container [2019-10-13 21:37:32,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:37:32" (1/1) ... [2019-10-13 21:37:32,631 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:37:32,653 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:37:32,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:37:32,880 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:37:32,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:37:33,015 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:37:33,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:33 WrapperNode [2019-10-13 21:37:33,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:37:33,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:37:33,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:37:33,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:37:33,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:33" (1/1) ... [2019-10-13 21:37:33,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:33" (1/1) ... [2019-10-13 21:37:33,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:33" (1/1) ... [2019-10-13 21:37:33,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:33" (1/1) ... [2019-10-13 21:37:33,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:33" (1/1) ... [2019-10-13 21:37:33,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:33" (1/1) ... [2019-10-13 21:37:33,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:33" (1/1) ... [2019-10-13 21:37:33,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:37:33,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:37:33,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:37:33,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:37:33,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:33" (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 [2019-10-13 21:37:33,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:37:33,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:37:33,123 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 21:37:33,123 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:37:33,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:37:33,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 21:37:33,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-13 21:37:33,124 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:37:33,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:37:33,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:37:33,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:37:33,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:37:33,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:37:33,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:37:33,549 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:37:33,550 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-13 21:37:33,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:37:33 BoogieIcfgContainer [2019-10-13 21:37:33,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:37:33,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:37:33,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:37:33,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:37:33,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:37:32" (1/3) ... [2019-10-13 21:37:33,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66f42c0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:37:33, skipping insertion in model container [2019-10-13 21:37:33,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:33" (2/3) ... [2019-10-13 21:37:33,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66f42c0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:37:33, skipping insertion in model container [2019-10-13 21:37:33,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:37:33" (3/3) ... [2019-10-13 21:37:33,560 INFO L109 eAbstractionObserver]: Analyzing ICFG diff-2-n-u.c [2019-10-13 21:37:33,569 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:37:33,577 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:37:33,588 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:37:33,613 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:37:33,614 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:37:33,614 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:37:33,614 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:37:33,614 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:37:33,615 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:37:33,615 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:37:33,615 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:37:33,633 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-13 21:37:33,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 21:37:33,639 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:37:33,640 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:37:33,641 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:37:33,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:37:33,646 INFO L82 PathProgramCache]: Analyzing trace with hash 60049518, now seen corresponding path program 1 times [2019-10-13 21:37:33,653 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:37:33,653 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085373296] [2019-10-13 21:37:33,654 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:37:33,654 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:37:33,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:37:33,732 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:37:33,733 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834533546] [2019-10-13 21:37:33,733 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 [2019-10-13 21:37:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:37:33,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:37:33,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:37:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:37:33,880 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:37:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:37:33,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085373296] [2019-10-13 21:37:33,913 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:37:33,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834533546] [2019-10-13 21:37:33,914 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:37:33,915 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-13 21:37:33,915 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55262191] [2019-10-13 21:37:33,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:37:33,920 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:37:33,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:37:33,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:37:33,937 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2019-10-13 21:37:34,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:37:34,046 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2019-10-13 21:37:34,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:37:34,048 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-13 21:37:34,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:37:34,056 INFO L225 Difference]: With dead ends: 44 [2019-10-13 21:37:34,056 INFO L226 Difference]: Without dead ends: 24 [2019-10-13 21:37:34,059 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 [2019-10-13 21:37:34,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-13 21:37:34,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-13 21:37:34,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-13 21:37:34,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2019-10-13 21:37:34,098 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 14 [2019-10-13 21:37:34,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:37:34,098 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2019-10-13 21:37:34,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:37:34,099 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2019-10-13 21:37:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 21:37:34,100 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:37:34,100 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:37:34,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:37:34,302 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:37:34,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:37:34,303 INFO L82 PathProgramCache]: Analyzing trace with hash 793182208, now seen corresponding path program 1 times [2019-10-13 21:37:34,303 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:37:34,304 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62568273] [2019-10-13 21:37:34,304 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:37:34,305 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:37:34,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:37:34,314 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:37:34,314 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863485204] [2019-10-13 21:37:34,314 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 [2019-10-13 21:37:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:37:34,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:37:34,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:37:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 21:37:34,389 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:37:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 21:37:34,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62568273] [2019-10-13 21:37:34,417 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:37:34,418 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863485204] [2019-10-13 21:37:34,418 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:37:34,418 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-13 21:37:34,418 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099851715] [2019-10-13 21:37:34,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:37:34,420 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:37:34,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:37:34,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:37:34,421 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 6 states. [2019-10-13 21:37:34,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:37:34,561 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2019-10-13 21:37:34,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:37:34,562 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-10-13 21:37:34,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:37:34,565 INFO L225 Difference]: With dead ends: 56 [2019-10-13 21:37:34,565 INFO L226 Difference]: Without dead ends: 39 [2019-10-13 21:37:34,566 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 [2019-10-13 21:37:34,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-13 21:37:34,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2019-10-13 21:37:34,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-13 21:37:34,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2019-10-13 21:37:34,581 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2019-10-13 21:37:34,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:37:34,581 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2019-10-13 21:37:34,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:37:34,582 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2019-10-13 21:37:34,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 21:37:34,583 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:37:34,583 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:37:34,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:37:34,794 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:37:34,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:37:34,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1989033728, now seen corresponding path program 1 times [2019-10-13 21:37:34,796 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:37:34,797 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768547129] [2019-10-13 21:37:34,797 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:37:34,798 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:37:34,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:37:34,831 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:37:34,832 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110088702] [2019-10-13 21:37:34,832 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 [2019-10-13 21:37:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:37:34,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:37:34,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:37:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:37:34,938 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:37:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:37:35,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768547129] [2019-10-13 21:37:35,001 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:37:35,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110088702] [2019-10-13 21:37:35,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [602137072] [2019-10-13 21:37:35,036 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-13 21:37:35,036 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:37:35,042 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:37:35,051 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:37:35,052 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:37:35,224 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:37:36,011 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2019-10-13 21:37:36,018 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:37:36,028 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:37:36,028 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:37:36,029 INFO L193 IcfgInterpreter]: Reachable states at location L24-2 satisfy 198#(<= 0 main_~j~0) [2019-10-13 21:37:36,029 INFO L193 IcfgInterpreter]: Reachable states at location L67-2 satisfy 145#(and (<= 0 main_~j~0) (<= 0 main_~m~0) (<= 0 main_~i~0) (<= main_~m~0 0) (= main_~j~0 0) (< main_~i~0 main_~m~0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:37:36,029 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 221#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:37:36,030 INFO L193 IcfgInterpreter]: Reachable states at location L36-2 satisfy 130#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (= main_~j~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:37:36,034 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 207#false [2019-10-13 21:37:36,035 INFO L193 IcfgInterpreter]: Reachable states at location L68 satisfy 150#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~m~0) (<= 0 main_~i~0) (< main_~j~0 main_~n~0) (= |main_#t~mem8| (select (select |#memory_int| |main_~#C~0.base|) (+ (* main_~j~0 4) (* main_~i~0 (* main_~n~0 4)) |main_~#C~0.offset|))) (< main_~i~0 main_~m~0) (<= main_~i~0 0) (= (select (select |#memory_int| |main_~#B~0.base|) (+ (* main_~j~0 4) (* main_~i~0 (* main_~n~0 4)) |main_~#B~0.offset|)) |main_#t~mem7|) (= (select (select |#memory_int| |main_~#A~0.base|) (+ (* main_~j~0 4) (* main_~i~0 (* main_~n~0 4)) |main_~#A~0.offset|)) |main_#t~mem6|) (<= main_~m~0 0) (= main_~j~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:37:36,035 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:37:36,035 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:37:36,036 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 226#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:37:36,036 INFO L193 IcfgInterpreter]: Reachable states at location L51-2 satisfy 135#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= main_~m~0 0) (= main_~j~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:37:36,036 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:37:36,037 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 217#false [2019-10-13 21:37:36,038 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 212#false [2019-10-13 21:37:36,038 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 202#false [2019-10-13 21:37:36,038 INFO L193 IcfgInterpreter]: Reachable states at location L22-2 satisfy 125#(or (and (= (store (store (store |old(#valid)| |main_~#A~0.base| 1) |main_~#B~0.base| 1) |main_~#C~0.base| 1) |#valid|) (= main_~n~0 1500) (= 0 |#NULL.base|) (< |main_~#C~0.base| |#StackHeapBarrier|) (<= 0 |#NULL.base|) (= 0 |main_~#A~0.offset|) (<= 0 |#NULL.offset|) (= 0 (select (store (store |old(#valid)| |main_~#A~0.base| 1) |main_~#B~0.base| 1) |main_~#C~0.base|)) (not (= 0 |main_~#A~0.base|)) (= main_~j~0 0) (= 0 |main_~#C~0.offset|) (= (select |old(#valid)| |main_~#A~0.base|) 0) (< |main_~#B~0.base| |#StackHeapBarrier|) (<= |#NULL.base| 0) (= (select (store |old(#valid)| |main_~#A~0.base| 1) |main_~#B~0.base|) 0) (not (= |main_~#B~0.base| 0)) (= 0 |main_~#B~0.offset|) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (not (= 0 |main_~#C~0.base|)) (= (store (store (store |old(#length)| |main_~#A~0.base| (* (* main_~n~0 4) main_~m~0)) |main_~#B~0.base| (* (* main_~n~0 4) main_~m~0)) |main_~#C~0.base| (* (* main_~n~0 4) main_~m~0)) |#length|) (< |main_~#A~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= main_~m~0 1000) (= |#NULL.offset| 0) (= main_~i~0 0)) (not (< main_~j~0 main_~n~0))) [2019-10-13 21:37:36,039 INFO L193 IcfgInterpreter]: Reachable states at location L65-2 satisfy 140#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= main_~m~0 0) (= main_~j~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:37:36,346 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2019-10-13 21:37:36,422 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:37:36,422 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 6] total 18 [2019-10-13 21:37:36,422 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314450129] [2019-10-13 21:37:36,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 21:37:36,424 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:37:36,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 21:37:36,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:37:36,425 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 10 states. [2019-10-13 21:37:36,686 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2019-10-13 21:37:36,919 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2019-10-13 21:37:37,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:37:37,196 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2019-10-13 21:37:37,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 21:37:37,198 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-10-13 21:37:37,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:37:37,199 INFO L225 Difference]: With dead ends: 64 [2019-10-13 21:37:37,199 INFO L226 Difference]: Without dead ends: 44 [2019-10-13 21:37:37,202 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 [2019-10-13 21:37:37,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-13 21:37:37,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2019-10-13 21:37:37,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-13 21:37:37,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2019-10-13 21:37:37,230 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 22 [2019-10-13 21:37:37,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:37:37,230 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2019-10-13 21:37:37,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 21:37:37,230 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2019-10-13 21:37:37,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 21:37:37,232 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:37:37,232 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] [2019-10-13 21:37:37,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:37:37,436 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:37:37,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:37:37,437 INFO L82 PathProgramCache]: Analyzing trace with hash 313530172, now seen corresponding path program 1 times [2019-10-13 21:37:37,437 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:37:37,438 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971819382] [2019-10-13 21:37:37,438 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:37:37,438 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:37:37,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:37:37,447 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:37:37,448 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354500403] [2019-10-13 21:37:37,448 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 [2019-10-13 21:37:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:37:37,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:37:37,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:37:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:37:37,544 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:37:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:37:37,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971819382] [2019-10-13 21:37:37,577 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:37:37,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354500403] [2019-10-13 21:37:37,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1586165032] [2019-10-13 21:37:37,580 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-13 21:37:37,580 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:37:37,580 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:37:37,581 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:37:37,581 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:37:37,618 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:37:38,759 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2019-10-13 21:37:38,767 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:37:38,771 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:37:38,771 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:37:38,771 INFO L193 IcfgInterpreter]: Reachable states at location L24-2 satisfy 433#(<= 0 main_~j~0) [2019-10-13 21:37:38,772 INFO L193 IcfgInterpreter]: Reachable states at location L67-2 satisfy 386#(and (<= 0 main_~j~0) (<= 0 main_~m~0) (<= 0 main_~i~0) (= main_~j~0 0) (< main_~i~0 main_~m~0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:37:38,772 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 456#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:37:38,772 INFO L193 IcfgInterpreter]: Reachable states at location L36-2 satisfy 234#(or (and (<= 0 main_~j~0) (<= 0 main_~m~0) (<= 1 main_~i~0) (not (< main_~j~0 main_~n~0))) (and (<= 0 main_~j~0) (<= 0 main_~i~0) (= main_~j~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0))) [2019-10-13 21:37:38,772 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 442#(and (exists ((|v_main_~#B~0.base_BEFORE_CALL_2| Int) (v_prenex_6 Int) (|v_main_~#C~0.base_BEFORE_CALL_2| Int) (v_prenex_4 Int) (v_prenex_5 Int) (v_prenex_2 Int) (v_prenex_3 Int) (v_prenex_1 Int) (|v_main_~#C~0.offset_BEFORE_CALL_2| Int) (|v_main_~#B~0.offset_BEFORE_CALL_2| Int) (|v_main_~#A~0.offset_BEFORE_CALL_2| Int) (|v_main_~#A~0.base_BEFORE_CALL_2| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (mod (+ (select (select |#memory_int| v_prenex_6) v_prenex_4) (* (select (select |#memory_int| v_prenex_5) v_prenex_3) 4294967295)) 4294967296) (mod (select (select |#memory_int| v_prenex_1) v_prenex_2) 4294967296)))) (and (= |__VERIFIER_assert_#in~cond| 1) (= (mod (+ (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) |v_main_~#A~0.offset_BEFORE_CALL_2|) (* (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_2|) |v_main_~#B~0.offset_BEFORE_CALL_2|) 4294967295)) 4294967296) (mod (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_2|) |v_main_~#C~0.offset_BEFORE_CALL_2|) 4294967296))))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:37:38,772 INFO L193 IcfgInterpreter]: Reachable states at location L38-2 satisfy 229#(and (<= 0 main_~j~0) (<= 0 main_~m~0) (<= 0 main_~i~0)) [2019-10-13 21:37:38,773 INFO L193 IcfgInterpreter]: Reachable states at location L68 satisfy 381#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~m~0) (<= 0 main_~i~0) (< main_~j~0 main_~n~0) (= |main_#t~mem8| (select (select |#memory_int| |main_~#C~0.base|) (+ (* main_~j~0 4) (* main_~i~0 (* main_~n~0 4)) |main_~#C~0.offset|))) (< main_~i~0 main_~m~0) (<= main_~i~0 0) (= (select (select |#memory_int| |main_~#B~0.base|) (+ (* main_~j~0 4) (* main_~i~0 (* main_~n~0 4)) |main_~#B~0.offset|)) |main_#t~mem7|) (= (select (select |#memory_int| |main_~#A~0.base|) (+ (* main_~j~0 4) (* main_~i~0 (* main_~n~0 4)) |main_~#A~0.offset|)) |main_#t~mem6|) (= main_~j~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:37:38,773 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:37:38,773 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:37:38,773 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 461#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:37:38,774 INFO L193 IcfgInterpreter]: Reachable states at location L51-2 satisfy 343#true [2019-10-13 21:37:38,774 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 452#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_main_~#B~0.base_BEFORE_CALL_2| Int) (v_prenex_6 Int) (|v_main_~#C~0.base_BEFORE_CALL_2| Int) (v_prenex_4 Int) (v_prenex_5 Int) (v_prenex_2 Int) (v_prenex_3 Int) (v_prenex_1 Int) (|v_main_~#C~0.offset_BEFORE_CALL_2| Int) (|v_main_~#B~0.offset_BEFORE_CALL_2| Int) (|v_main_~#A~0.offset_BEFORE_CALL_2| Int) (|v_main_~#A~0.base_BEFORE_CALL_2| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (mod (+ (select (select |#memory_int| v_prenex_6) v_prenex_4) (* (select (select |#memory_int| v_prenex_5) v_prenex_3) 4294967295)) 4294967296) (mod (select (select |#memory_int| v_prenex_1) v_prenex_2) 4294967296)))) (and (= |__VERIFIER_assert_#in~cond| 1) (= (mod (+ (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) |v_main_~#A~0.offset_BEFORE_CALL_2|) (* (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_2|) |v_main_~#B~0.offset_BEFORE_CALL_2|) 4294967295)) 4294967296) (mod (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_2|) |v_main_~#C~0.offset_BEFORE_CALL_2|) 4294967296))))) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:37:38,774 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:37:38,774 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 447#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_main_~#B~0.base_BEFORE_CALL_2| Int) (v_prenex_6 Int) (|v_main_~#C~0.base_BEFORE_CALL_2| Int) (v_prenex_4 Int) (v_prenex_5 Int) (v_prenex_2 Int) (v_prenex_3 Int) (v_prenex_1 Int) (|v_main_~#C~0.offset_BEFORE_CALL_2| Int) (|v_main_~#B~0.offset_BEFORE_CALL_2| Int) (|v_main_~#A~0.offset_BEFORE_CALL_2| Int) (|v_main_~#A~0.base_BEFORE_CALL_2| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (mod (+ (select (select |#memory_int| v_prenex_6) v_prenex_4) (* (select (select |#memory_int| v_prenex_5) v_prenex_3) 4294967295)) 4294967296) (mod (select (select |#memory_int| v_prenex_1) v_prenex_2) 4294967296)))) (and (= |__VERIFIER_assert_#in~cond| 1) (= (mod (+ (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) |v_main_~#A~0.offset_BEFORE_CALL_2|) (* (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_2|) |v_main_~#B~0.offset_BEFORE_CALL_2|) 4294967295)) 4294967296) (mod (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_2|) |v_main_~#C~0.offset_BEFORE_CALL_2|) 4294967296))))) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:37:38,775 INFO L193 IcfgInterpreter]: Reachable states at location L53-2 satisfy 338#true [2019-10-13 21:37:38,775 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 437#(exists ((|v_main_~#B~0.base_BEFORE_CALL_2| Int) (v_prenex_6 Int) (|v_main_~#C~0.base_BEFORE_CALL_2| Int) (v_prenex_4 Int) (v_prenex_5 Int) (v_prenex_2 Int) (v_prenex_3 Int) (v_prenex_1 Int) (|v_main_~#C~0.offset_BEFORE_CALL_2| Int) (|v_main_~#B~0.offset_BEFORE_CALL_2| Int) (|v_main_~#A~0.offset_BEFORE_CALL_2| Int) (|v_main_~#A~0.base_BEFORE_CALL_2| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (mod (+ (select (select |#memory_int| v_prenex_6) v_prenex_4) (* (select (select |#memory_int| v_prenex_5) v_prenex_3) 4294967295)) 4294967296) (mod (select (select |#memory_int| v_prenex_1) v_prenex_2) 4294967296)))) (and (= |__VERIFIER_assert_#in~cond| 1) (= (mod (+ (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) |v_main_~#A~0.offset_BEFORE_CALL_2|) (* (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_2|) |v_main_~#B~0.offset_BEFORE_CALL_2|) 4294967295)) 4294967296) (mod (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_2|) |v_main_~#C~0.offset_BEFORE_CALL_2|) 4294967296))))) [2019-10-13 21:37:38,775 INFO L193 IcfgInterpreter]: Reachable states at location L22-2 satisfy 125#(or (and (= (store (store (store |old(#valid)| |main_~#A~0.base| 1) |main_~#B~0.base| 1) |main_~#C~0.base| 1) |#valid|) (= main_~n~0 1500) (= 0 |#NULL.base|) (< |main_~#C~0.base| |#StackHeapBarrier|) (<= 0 |#NULL.base|) (= 0 |main_~#A~0.offset|) (= 0 (select (store (store |old(#valid)| |main_~#A~0.base| 1) |main_~#B~0.base| 1) |main_~#C~0.base|)) (<= 0 |#NULL.offset|) (not (= 0 |main_~#A~0.base|)) (= main_~j~0 0) (= 0 |main_~#C~0.offset|) (= (select |old(#valid)| |main_~#A~0.base|) 0) (< |main_~#B~0.base| |#StackHeapBarrier|) (<= |#NULL.base| 0) (= (select (store |old(#valid)| |main_~#A~0.base| 1) |main_~#B~0.base|) 0) (not (= |main_~#B~0.base| 0)) (= 0 |main_~#B~0.offset|) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (not (= 0 |main_~#C~0.base|)) (= (store (store (store |old(#length)| |main_~#A~0.base| (* (* main_~n~0 4) main_~m~0)) |main_~#B~0.base| (* (* main_~n~0 4) main_~m~0)) |main_~#C~0.base| (* (* main_~n~0 4) main_~m~0)) |#length|) (< |main_~#A~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= main_~m~0 1000) (= |#NULL.offset| 0) (= main_~i~0 0)) (not (< main_~j~0 main_~n~0))) [2019-10-13 21:37:38,775 INFO L193 IcfgInterpreter]: Reachable states at location L65-2 satisfy 348#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (and (= main_~j~0 0) (= main_~i~0 0)) (<= main_~i~0 0) (<= main_~j~0 0)) [2019-10-13 21:37:39,119 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2019-10-13 21:37:41,501 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-13 21:37:41,502 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 15] total 24 [2019-10-13 21:37:41,502 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108396015] [2019-10-13 21:37:41,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 21:37:41,503 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:37:41,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 21:37:41,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=464, Unknown=1, NotChecked=0, Total=552 [2019-10-13 21:37:41,504 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 24 states. [2019-10-13 21:37:41,863 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2019-10-13 21:37:43,737 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2019-10-13 21:37:57,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:37:57,090 INFO L93 Difference]: Finished difference Result 107 states and 148 transitions. [2019-10-13 21:37:57,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 21:37:57,091 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 30 [2019-10-13 21:37:57,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:37:57,092 INFO L225 Difference]: With dead ends: 107 [2019-10-13 21:37:57,092 INFO L226 Difference]: Without dead ends: 78 [2019-10-13 21:37:57,094 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=323, Invalid=1235, Unknown=2, NotChecked=0, Total=1560 [2019-10-13 21:37:57,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-13 21:37:57,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2019-10-13 21:37:57,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-13 21:37:57,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2019-10-13 21:37:57,116 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 30 [2019-10-13 21:37:57,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:37:57,117 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2019-10-13 21:37:57,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 21:37:57,117 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2019-10-13 21:37:57,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 21:37:57,119 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:37:57,119 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] [2019-10-13 21:37:57,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:37:57,320 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:37:57,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:37:57,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1104473412, now seen corresponding path program 2 times [2019-10-13 21:37:57,321 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:37:57,322 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749690576] [2019-10-13 21:37:57,322 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:37:57,322 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:37:57,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:37:57,334 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:37:57,335 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088641205] [2019-10-13 21:37:57,335 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 [2019-10-13 21:37:57,413 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 21:37:57,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 21:37:57,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:37:57,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:37:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2019-10-13 21:37:57,464 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:37:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2019-10-13 21:37:57,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749690576] [2019-10-13 21:37:57,493 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:37:57,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088641205] [2019-10-13 21:37:57,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1637123370] [2019-10-13 21:37:57,495 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-13 21:37:57,495 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:37:57,496 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:37:57,496 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:37:57,496 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:37:57,517 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:37:58,460 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2019-10-13 21:37:58,469 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:37:58,473 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:37:58,473 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:37:58,473 INFO L193 IcfgInterpreter]: Reachable states at location L24-2 satisfy 433#(<= 0 main_~j~0) [2019-10-13 21:37:58,473 INFO L193 IcfgInterpreter]: Reachable states at location L67-2 satisfy 386#(and (<= 0 main_~j~0) (<= 0 main_~m~0) (<= 0 main_~i~0) (= main_~j~0 0) (< main_~i~0 main_~m~0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:37:58,474 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 456#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:37:58,474 INFO L193 IcfgInterpreter]: Reachable states at location L36-2 satisfy 234#(or (and (<= 0 main_~j~0) (<= 0 main_~m~0) (<= 1 main_~i~0) (not (< main_~j~0 main_~n~0))) (and (<= 0 main_~j~0) (<= 0 main_~i~0) (= main_~j~0 0) (<= main_~i~0 0) (<= main_~j~0 0) (= main_~i~0 0))) [2019-10-13 21:37:58,474 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 442#(and (exists ((v_prenex_12 Int) (v_prenex_11 Int) (v_prenex_10 Int) (v_prenex_8 Int) (v_prenex_9 Int) (|v_main_~#C~0.base_BEFORE_CALL_3| Int) (v_prenex_7 Int) (|v_main_~#B~0.base_BEFORE_CALL_3| Int) (|v_main_~#C~0.offset_BEFORE_CALL_3| Int) (|v_main_~#A~0.base_BEFORE_CALL_3| Int) (|v_main_~#B~0.offset_BEFORE_CALL_3| Int) (|v_main_~#A~0.offset_BEFORE_CALL_3| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (mod (select (select |#memory_int| v_prenex_7) v_prenex_9) 4294967296) (mod (+ (* (select (select |#memory_int| v_prenex_8) v_prenex_11) 4294967295) (select (select |#memory_int| v_prenex_10) v_prenex_12)) 4294967296)))) (and (= |__VERIFIER_assert_#in~cond| 1) (= (mod (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_3|) |v_main_~#C~0.offset_BEFORE_CALL_3|) 4294967296) (mod (+ (* (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_3|) |v_main_~#B~0.offset_BEFORE_CALL_3|) 4294967295) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_3|) |v_main_~#A~0.offset_BEFORE_CALL_3|)) 4294967296))))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:37:58,474 INFO L193 IcfgInterpreter]: Reachable states at location L38-2 satisfy 229#(and (<= 0 main_~j~0) (<= 0 main_~m~0) (<= 0 main_~i~0)) [2019-10-13 21:37:58,475 INFO L193 IcfgInterpreter]: Reachable states at location L68 satisfy 381#(and (<= 0 main_~j~0) (<= 0 main_~n~0) (<= 0 main_~m~0) (<= 0 main_~i~0) (< main_~j~0 main_~n~0) (= |main_#t~mem8| (select (select |#memory_int| |main_~#C~0.base|) (+ (* main_~j~0 4) (* main_~i~0 (* main_~n~0 4)) |main_~#C~0.offset|))) (< main_~i~0 main_~m~0) (<= main_~i~0 0) (= (select (select |#memory_int| |main_~#B~0.base|) (+ (* main_~j~0 4) (* main_~i~0 (* main_~n~0 4)) |main_~#B~0.offset|)) |main_#t~mem7|) (= (select (select |#memory_int| |main_~#A~0.base|) (+ (* main_~j~0 4) (* main_~i~0 (* main_~n~0 4)) |main_~#A~0.offset|)) |main_#t~mem6|) (= main_~j~0 0) (<= main_~j~0 0) (= main_~i~0 0)) [2019-10-13 21:37:58,475 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:37:58,475 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:37:58,475 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 461#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:37:58,475 INFO L193 IcfgInterpreter]: Reachable states at location L51-2 satisfy 343#true [2019-10-13 21:37:58,476 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 452#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (exists ((v_prenex_12 Int) (v_prenex_11 Int) (v_prenex_10 Int) (v_prenex_8 Int) (v_prenex_9 Int) (|v_main_~#C~0.base_BEFORE_CALL_3| Int) (v_prenex_7 Int) (|v_main_~#B~0.base_BEFORE_CALL_3| Int) (|v_main_~#C~0.offset_BEFORE_CALL_3| Int) (|v_main_~#A~0.base_BEFORE_CALL_3| Int) (|v_main_~#B~0.offset_BEFORE_CALL_3| Int) (|v_main_~#A~0.offset_BEFORE_CALL_3| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (mod (select (select |#memory_int| v_prenex_7) v_prenex_9) 4294967296) (mod (+ (* (select (select |#memory_int| v_prenex_8) v_prenex_11) 4294967295) (select (select |#memory_int| v_prenex_10) v_prenex_12)) 4294967296)))) (and (= |__VERIFIER_assert_#in~cond| 1) (= (mod (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_3|) |v_main_~#C~0.offset_BEFORE_CALL_3|) 4294967296) (mod (+ (* (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_3|) |v_main_~#B~0.offset_BEFORE_CALL_3|) 4294967295) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_3|) |v_main_~#A~0.offset_BEFORE_CALL_3|)) 4294967296))))) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:37:58,476 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:37:58,476 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 447#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (exists ((v_prenex_12 Int) (v_prenex_11 Int) (v_prenex_10 Int) (v_prenex_8 Int) (v_prenex_9 Int) (|v_main_~#C~0.base_BEFORE_CALL_3| Int) (v_prenex_7 Int) (|v_main_~#B~0.base_BEFORE_CALL_3| Int) (|v_main_~#C~0.offset_BEFORE_CALL_3| Int) (|v_main_~#A~0.base_BEFORE_CALL_3| Int) (|v_main_~#B~0.offset_BEFORE_CALL_3| Int) (|v_main_~#A~0.offset_BEFORE_CALL_3| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (mod (select (select |#memory_int| v_prenex_7) v_prenex_9) 4294967296) (mod (+ (* (select (select |#memory_int| v_prenex_8) v_prenex_11) 4294967295) (select (select |#memory_int| v_prenex_10) v_prenex_12)) 4294967296)))) (and (= |__VERIFIER_assert_#in~cond| 1) (= (mod (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_3|) |v_main_~#C~0.offset_BEFORE_CALL_3|) 4294967296) (mod (+ (* (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_3|) |v_main_~#B~0.offset_BEFORE_CALL_3|) 4294967295) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_3|) |v_main_~#A~0.offset_BEFORE_CALL_3|)) 4294967296))))) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:37:58,476 INFO L193 IcfgInterpreter]: Reachable states at location L53-2 satisfy 338#true [2019-10-13 21:37:58,477 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 437#(exists ((v_prenex_12 Int) (v_prenex_11 Int) (v_prenex_10 Int) (v_prenex_8 Int) (v_prenex_9 Int) (|v_main_~#C~0.base_BEFORE_CALL_3| Int) (v_prenex_7 Int) (|v_main_~#B~0.base_BEFORE_CALL_3| Int) (|v_main_~#C~0.offset_BEFORE_CALL_3| Int) (|v_main_~#A~0.base_BEFORE_CALL_3| Int) (|v_main_~#B~0.offset_BEFORE_CALL_3| Int) (|v_main_~#A~0.offset_BEFORE_CALL_3| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= (mod (select (select |#memory_int| v_prenex_7) v_prenex_9) 4294967296) (mod (+ (* (select (select |#memory_int| v_prenex_8) v_prenex_11) 4294967295) (select (select |#memory_int| v_prenex_10) v_prenex_12)) 4294967296)))) (and (= |__VERIFIER_assert_#in~cond| 1) (= (mod (select (select |#memory_int| |v_main_~#C~0.base_BEFORE_CALL_3|) |v_main_~#C~0.offset_BEFORE_CALL_3|) 4294967296) (mod (+ (* (select (select |#memory_int| |v_main_~#B~0.base_BEFORE_CALL_3|) |v_main_~#B~0.offset_BEFORE_CALL_3|) 4294967295) (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_3|) |v_main_~#A~0.offset_BEFORE_CALL_3|)) 4294967296))))) [2019-10-13 21:37:58,477 INFO L193 IcfgInterpreter]: Reachable states at location L22-2 satisfy 125#(or (and (= (store (store (store |old(#valid)| |main_~#A~0.base| 1) |main_~#B~0.base| 1) |main_~#C~0.base| 1) |#valid|) (= main_~n~0 1500) (= 0 |#NULL.base|) (< |main_~#C~0.base| |#StackHeapBarrier|) (<= 0 |#NULL.base|) (= 0 |main_~#A~0.offset|) (= 0 (select (store (store |old(#valid)| |main_~#A~0.base| 1) |main_~#B~0.base| 1) |main_~#C~0.base|)) (<= 0 |#NULL.offset|) (not (= 0 |main_~#A~0.base|)) (= main_~j~0 0) (= 0 |main_~#C~0.offset|) (= (select |old(#valid)| |main_~#A~0.base|) 0) (< |main_~#B~0.base| |#StackHeapBarrier|) (<= |#NULL.base| 0) (= (select (store |old(#valid)| |main_~#A~0.base| 1) |main_~#B~0.base|) 0) (not (= |main_~#B~0.base| 0)) (= 0 |main_~#B~0.offset|) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (not (= 0 |main_~#C~0.base|)) (= (store (store (store |old(#length)| |main_~#A~0.base| (* (* main_~n~0 4) main_~m~0)) |main_~#B~0.base| (* (* main_~n~0 4) main_~m~0)) |main_~#C~0.base| (* (* main_~n~0 4) main_~m~0)) |#length|) (< |main_~#A~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= main_~m~0 1000) (= |#NULL.offset| 0) (= main_~i~0 0)) (not (< main_~j~0 main_~n~0))) [2019-10-13 21:37:58,477 INFO L193 IcfgInterpreter]: Reachable states at location L65-2 satisfy 348#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (and (= main_~j~0 0) (= main_~i~0 0)) (<= main_~i~0 0) (<= main_~j~0 0)) [2019-10-13 21:37:58,823 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2019-10-13 21:37:59,127 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-13 21:37:59,127 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 15] total 22 [2019-10-13 21:37:59,127 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462021369] [2019-10-13 21:37:59,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 21:37:59,129 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:37:59,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 21:37:59,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2019-10-13 21:37:59,130 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand 22 states. [2019-10-13 21:37:59,388 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2019-10-13 21:38:01,069 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2019-10-13 21:38:01,359 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2019-10-13 21:38:01,702 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2019-10-13 21:38:02,049 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2019-10-13 21:38:19,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:38:19,918 INFO L93 Difference]: Finished difference Result 248 states and 308 transitions. [2019-10-13 21:38:19,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 21:38:19,919 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 46 [2019-10-13 21:38:19,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:38:19,923 INFO L225 Difference]: With dead ends: 248 [2019-10-13 21:38:19,923 INFO L226 Difference]: Without dead ends: 197 [2019-10-13 21:38:19,927 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=269, Invalid=1062, Unknown=1, NotChecked=0, Total=1332 [2019-10-13 21:38:19,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-10-13 21:38:19,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 137. [2019-10-13 21:38:19,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-10-13 21:38:19,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 159 transitions. [2019-10-13 21:38:19,987 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 159 transitions. Word has length 46 [2019-10-13 21:38:19,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:38:19,987 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 159 transitions. [2019-10-13 21:38:19,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 21:38:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 159 transitions. [2019-10-13 21:38:20,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-13 21:38:20,000 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:38:20,000 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] [2019-10-13 21:38:20,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:38:20,206 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:38:20,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:38:20,207 INFO L82 PathProgramCache]: Analyzing trace with hash 2012444802, now seen corresponding path program 3 times [2019-10-13 21:38:20,207 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:38:20,208 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382576346] [2019-10-13 21:38:20,208 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:20,208 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:20,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:38:20,228 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:38:20,228 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139060227] [2019-10-13 21:38:20,228 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