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/copy-2-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:36:31,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:36:31,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:36:31,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:36:31,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:36:31,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:36:31,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:36:31,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:36:31,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:36:31,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:36:31,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:36:31,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:36:31,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:36:31,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:36:31,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:36:31,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:36:31,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:36:31,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:36:31,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:36:31,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:36:31,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:36:31,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:36:31,430 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:36:31,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:36:31,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:36:31,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:36:31,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:36:31,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:36:31,448 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:36:31,472 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:36:31,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:36:31,474 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:36:31,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:36:31,475 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:36:31,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:36:31,475 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:36:31,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:36:31,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:36:31,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:36:31,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:36:31,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:36:31,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:36:31,478 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:36:31,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:36:31,478 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:36:31,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:36:31,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:36:31,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:36:31,479 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:36:31,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:36:31,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:36:31,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:36:31,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:36:31,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:36:31,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:36:31,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:36:31,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:36:31,481 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:36:31,760 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:36:31,774 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:36:31,777 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:36:31,779 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:36:31,779 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:36:31,780 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/copy-2-u.c [2019-10-15 01:36:31,843 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/705cdaec5/7cb6a14541bf4d91a6eca88696780c54/FLAG9d6cd9295 [2019-10-15 01:36:32,259 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:36:32,261 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/copy-2-u.c [2019-10-15 01:36:32,269 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/705cdaec5/7cb6a14541bf4d91a6eca88696780c54/FLAG9d6cd9295 [2019-10-15 01:36:32,616 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/705cdaec5/7cb6a14541bf4d91a6eca88696780c54 [2019-10-15 01:36:32,627 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:36:32,629 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:36:32,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:36:32,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:36:32,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:36:32,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:32,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@335d4cc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32, skipping insertion in model container [2019-10-15 01:36:32,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:32,646 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:36:32,673 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:36:32,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:36:32,894 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:36:32,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:36:32,943 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:36:32,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32 WrapperNode [2019-10-15 01:36:32,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:36:32,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:36:32,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:36:32,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:36:33,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:33,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:33,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:33,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:33,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:33,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:33,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:33,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:36:33,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:36:33,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:36:33,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:36:33,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:36:33,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:36:33,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:36:33,143 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:36:33,143 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:36:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:36:33,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:36:33,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:36:33,144 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:36:33,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:36:33,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:36:33,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:36:33,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:36:33,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:36:33,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:36:33,548 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:36:33,548 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-15 01:36:33,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:36:33 BoogieIcfgContainer [2019-10-15 01:36:33,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:36:33,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:36:33,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:36:33,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:36:33,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:36:32" (1/3) ... [2019-10-15 01:36:33,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8db8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:36:33, skipping insertion in model container [2019-10-15 01:36:33,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (2/3) ... [2019-10-15 01:36:33,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8db8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:36:33, skipping insertion in model container [2019-10-15 01:36:33,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:36:33" (3/3) ... [2019-10-15 01:36:33,558 INFO L109 eAbstractionObserver]: Analyzing ICFG copy-2-u.c [2019-10-15 01:36:33,567 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:36:33,579 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:36:33,592 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:36:33,617 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:36:33,617 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:36:33,617 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:36:33,617 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:36:33,617 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:36:33,618 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:36:33,618 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:36:33,618 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:36:33,635 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-15 01:36:33,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:36:33,641 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:33,642 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:33,644 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:33,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:33,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1976687735, now seen corresponding path program 1 times [2019-10-15 01:36:33,657 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:33,657 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667992587] [2019-10-15 01:36:33,658 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:33,658 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:33,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:33,732 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:33,733 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645732569] [2019-10-15 01:36:33,733 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 [2019-10-15 01:36:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:33,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:36:33,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:36:33,878 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:36:33,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667992587] [2019-10-15 01:36:33,918 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:33,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645732569] [2019-10-15 01:36:33,919 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:36:33,920 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-15 01:36:33,920 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326921862] [2019-10-15 01:36:33,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:36:33,926 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:33,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:36:33,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:36:33,944 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2019-10-15 01:36:34,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:34,066 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2019-10-15 01:36:34,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:36:34,070 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-15 01:36:34,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:34,083 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:36:34,084 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 01:36:34,090 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:36:34,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 01:36:34,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 01:36:34,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:36:34,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-10-15 01:36:34,149 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 13 [2019-10-15 01:36:34,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:34,151 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-10-15 01:36:34,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:36:34,151 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-10-15 01:36:34,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 01:36:34,153 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:34,153 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:34,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:34,359 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:34,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:34,360 INFO L82 PathProgramCache]: Analyzing trace with hash 654064881, now seen corresponding path program 1 times [2019-10-15 01:36:34,361 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:34,361 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729842671] [2019-10-15 01:36:34,361 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:34,362 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:34,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:34,383 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:34,384 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154573390] [2019-10-15 01:36:34,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:34,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:36:34,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:36:34,478 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:36:34,505 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729842671] [2019-10-15 01:36:34,505 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:34,505 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154573390] [2019-10-15 01:36:34,505 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:36:34,506 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:36:34,506 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459514069] [2019-10-15 01:36:34,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:36:34,509 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:34,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:36:34,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:36:34,510 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 6 states. [2019-10-15 01:36:34,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:34,634 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2019-10-15 01:36:34,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:36:34,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-10-15 01:36:34,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:34,638 INFO L225 Difference]: With dead ends: 49 [2019-10-15 01:36:34,638 INFO L226 Difference]: Without dead ends: 34 [2019-10-15 01:36:34,639 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:36:34,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-15 01:36:34,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-10-15 01:36:34,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:36:34,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2019-10-15 01:36:34,652 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 17 [2019-10-15 01:36:34,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:34,652 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2019-10-15 01:36:34,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:36:34,652 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2019-10-15 01:36:34,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:36:34,653 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:34,654 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:34,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:34,857 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:34,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:34,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1291494287, now seen corresponding path program 1 times [2019-10-15 01:36:34,859 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:34,860 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069223758] [2019-10-15 01:36:34,860 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:34,861 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:34,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:34,869 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:34,870 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72571741] [2019-10-15 01:36:34,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:34,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:36:34,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:36:35,017 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:36:35,056 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069223758] [2019-10-15 01:36:35,056 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:35,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72571741] [2019-10-15 01:36:35,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [670061319] [2019-10-15 01:36:35,080 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:36:35,081 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:35,086 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:35,094 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:35,094 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:35,279 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:35,772 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2019-10-15 01:36:35,778 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:35,783 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:36,078 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2019-10-15 01:36:36,162 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:36:36,162 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 6] total 18 [2019-10-15 01:36:36,162 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268458750] [2019-10-15 01:36:36,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 01:36:36,164 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:36,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 01:36:36,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:36:36,165 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 10 states. [2019-10-15 01:36:36,370 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2019-10-15 01:36:36,588 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2019-10-15 01:36:36,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:36,794 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2019-10-15 01:36:36,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-15 01:36:36,795 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-10-15 01:36:36,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:36,797 INFO L225 Difference]: With dead ends: 53 [2019-10-15 01:36:36,797 INFO L226 Difference]: Without dead ends: 38 [2019-10-15 01:36:36,798 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:36:36,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-15 01:36:36,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2019-10-15 01:36:36,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 01:36:36,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-10-15 01:36:36,810 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 21 [2019-10-15 01:36:36,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:36,810 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-10-15 01:36:36,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-15 01:36:36,811 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-10-15 01:36:36,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 01:36:36,812 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:36,812 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:37,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:37,016 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:37,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:37,017 INFO L82 PathProgramCache]: Analyzing trace with hash 234971044, now seen corresponding path program 1 times [2019-10-15 01:36:37,017 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:37,017 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861586558] [2019-10-15 01:36:37,018 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:37,018 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:37,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:37,026 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:37,026 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290601741] [2019-10-15 01:36:37,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:37,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:36:37,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:36:37,132 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:36:37,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861586558] [2019-10-15 01:36:37,165 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:37,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290601741] [2019-10-15 01:36:37,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1755640946] [2019-10-15 01:36:37,167 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:36:37,168 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:37,168 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:37,168 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:37,169 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:37,234 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:38,092 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:36:38,101 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:38,106 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:38,401 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2019-10-15 01:36:38,686 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:36:38,686 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 14] total 24 [2019-10-15 01:36:38,686 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501026720] [2019-10-15 01:36:38,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 01:36:38,688 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:38,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 01:36:38,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:36:38,689 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 24 states. [2019-10-15 01:36:39,028 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2019-10-15 01:36:39,600 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2019-10-15 01:36:40,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:40,264 INFO L93 Difference]: Finished difference Result 92 states and 125 transitions. [2019-10-15 01:36:40,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-15 01:36:40,264 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 25 [2019-10-15 01:36:40,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:40,266 INFO L225 Difference]: With dead ends: 92 [2019-10-15 01:36:40,266 INFO L226 Difference]: Without dead ends: 68 [2019-10-15 01:36:40,267 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:36:40,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-15 01:36:40,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2019-10-15 01:36:40,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-15 01:36:40,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2019-10-15 01:36:40,283 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 25 [2019-10-15 01:36:40,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:40,284 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2019-10-15 01:36:40,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 01:36:40,284 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2019-10-15 01:36:40,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-15 01:36:40,285 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:40,285 INFO L380 BasicCegarLoop]: trace histogram [12, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:40,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:40,497 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:40,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:40,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1455913956, now seen corresponding path program 2 times [2019-10-15 01:36:40,498 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:40,498 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716362829] [2019-10-15 01:36:40,498 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:40,498 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:40,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:40,506 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:40,506 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335250990] [2019-10-15 01:36:40,506 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:40,572 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:36:40,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:40,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:36:40,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-10-15 01:36:40,619 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-10-15 01:36:40,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716362829] [2019-10-15 01:36:40,649 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:40,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335250990] [2019-10-15 01:36:40,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [650402322] [2019-10-15 01:36:40,652 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:36:40,652 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:40,652 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:40,653 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:40,653 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:40,682 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:41,252 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:36:41,260 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:41,263 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:41,570 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2019-10-15 01:36:41,866 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:36:41,866 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 14] total 22 [2019-10-15 01:36:41,866 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257231210] [2019-10-15 01:36:41,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:36:41,868 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:41,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:36:41,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:36:41,869 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 22 states. [2019-10-15 01:36:42,129 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2019-10-15 01:36:42,410 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2019-10-15 01:36:42,661 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2019-10-15 01:36:42,894 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2019-10-15 01:36:43,160 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2019-10-15 01:36:44,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:44,011 INFO L93 Difference]: Finished difference Result 206 states and 256 transitions. [2019-10-15 01:36:44,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-15 01:36:44,012 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2019-10-15 01:36:44,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:44,014 INFO L225 Difference]: With dead ends: 206 [2019-10-15 01:36:44,014 INFO L226 Difference]: Without dead ends: 164 [2019-10-15 01:36:44,018 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=269, Invalid=1063, Unknown=0, NotChecked=0, Total=1332 [2019-10-15 01:36:44,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-10-15 01:36:44,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 104. [2019-10-15 01:36:44,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-15 01:36:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 121 transitions. [2019-10-15 01:36:44,060 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 121 transitions. Word has length 37 [2019-10-15 01:36:44,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:44,061 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 121 transitions. [2019-10-15 01:36:44,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:36:44,061 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 121 transitions. [2019-10-15 01:36:44,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-15 01:36:44,065 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:44,065 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:44,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:44,270 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:44,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:44,271 INFO L82 PathProgramCache]: Analyzing trace with hash 700042807, now seen corresponding path program 3 times [2019-10-15 01:36:44,271 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:44,271 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967891324] [2019-10-15 01:36:44,271 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:44,272 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:44,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:44,287 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:44,287 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527089820] [2019-10-15 01:36:44,288 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 [2019-10-15 01:36:44,386 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:36:44,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:44,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 01:36:44,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 15 proven. 310 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2019-10-15 01:36:44,533 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 15 proven. 310 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2019-10-15 01:36:44,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967891324] [2019-10-15 01:36:44,723 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:44,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527089820] [2019-10-15 01:36:44,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [627042797] [2019-10-15 01:36:44,725 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:36:44,725 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:44,726 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:44,726 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:44,726 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:44,750 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:45,201 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:36:45,211 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:45,215 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:45,547 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2019-10-15 01:36:45,917 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:36:45,918 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2019-10-15 01:36:45,918 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990569429] [2019-10-15 01:36:45,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-15 01:36:45,919 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:45,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-15 01:36:45,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:36:45,921 INFO L87 Difference]: Start difference. First operand 104 states and 121 transitions. Second operand 40 states. [2019-10-15 01:36:46,190 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2019-10-15 01:36:48,802 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2019-10-15 01:36:51,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:51,009 INFO L93 Difference]: Finished difference Result 415 states and 520 transitions. [2019-10-15 01:36:51,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-10-15 01:36:51,009 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 77 [2019-10-15 01:36:51,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:51,012 INFO L225 Difference]: With dead ends: 415 [2019-10-15 01:36:51,012 INFO L226 Difference]: Without dead ends: 349 [2019-10-15 01:36:51,016 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2612 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1512, Invalid=6678, Unknown=0, NotChecked=0, Total=8190 [2019-10-15 01:36:51,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2019-10-15 01:36:51,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 154. [2019-10-15 01:36:51,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-10-15 01:36:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 179 transitions. [2019-10-15 01:36:51,088 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 179 transitions. Word has length 77 [2019-10-15 01:36:51,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:51,090 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 179 transitions. [2019-10-15 01:36:51,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-15 01:36:51,090 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 179 transitions. [2019-10-15 01:36:51,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-15 01:36:51,100 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:51,101 INFO L380 BasicCegarLoop]: trace histogram [36, 36, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:51,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:51,305 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:51,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:51,306 INFO L82 PathProgramCache]: Analyzing trace with hash -548041961, now seen corresponding path program 4 times [2019-10-15 01:36:51,307 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:51,307 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846634990] [2019-10-15 01:36:51,307 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:51,307 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:51,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:51,318 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:51,318 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576856877] [2019-10-15 01:36:51,318 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 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 01:36:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:51,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:36:51,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 1492 trivial. 0 not checked. [2019-10-15 01:36:51,583 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 1492 trivial. 0 not checked. [2019-10-15 01:36:51,661 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846634990] [2019-10-15 01:36:51,661 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:51,661 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576856877] [2019-10-15 01:36:51,661 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1825794213] [2019-10-15 01:36:51,663 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:36:51,663 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:51,663 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:51,664 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:51,664 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:51,681 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:52,156 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:36:52,164 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:52,167 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:52,426 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2019-10-15 01:36:52,657 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:36:52,657 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 14] total 32 [2019-10-15 01:36:52,658 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937849659] [2019-10-15 01:36:52,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-15 01:36:52,659 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:52,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-15 01:36:52,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2019-10-15 01:36:52,660 INFO L87 Difference]: Start difference. First operand 154 states and 179 transitions. Second operand 32 states. [2019-10-15 01:36:52,915 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2019-10-15 01:36:53,897 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2019-10-15 01:36:54,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:54,985 INFO L93 Difference]: Finished difference Result 432 states and 606 transitions. [2019-10-15 01:36:54,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-15 01:36:54,986 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 109 [2019-10-15 01:36:54,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:54,988 INFO L225 Difference]: With dead ends: 432 [2019-10-15 01:36:54,988 INFO L226 Difference]: Without dead ends: 291 [2019-10-15 01:36:54,991 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=671, Invalid=2299, Unknown=0, NotChecked=0, Total=2970 [2019-10-15 01:36:54,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2019-10-15 01:36:55,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 288. [2019-10-15 01:36:55,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2019-10-15 01:36:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 319 transitions. [2019-10-15 01:36:55,028 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 319 transitions. Word has length 109 [2019-10-15 01:36:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:55,028 INFO L462 AbstractCegarLoop]: Abstraction has 288 states and 319 transitions. [2019-10-15 01:36:55,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-15 01:36:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 319 transitions. [2019-10-15 01:36:55,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-10-15 01:36:55,030 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:55,031 INFO L380 BasicCegarLoop]: trace histogram [98, 98, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:55,234 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:55,235 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:55,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:55,236 INFO L82 PathProgramCache]: Analyzing trace with hash 431166343, now seen corresponding path program 5 times [2019-10-15 01:36:55,236 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:55,236 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962851957] [2019-10-15 01:36:55,237 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:55,237 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:55,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:55,257 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:55,257 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293568908] [2019-10-15 01:36:55,257 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 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