/usr/bin/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-fb55353 [2019-11-07 01:29:00,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:29:00,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:29:00,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:29:00,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:29:00,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:29:00,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:29:00,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:29:00,343 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:29:00,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:29:00,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:29:00,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:29:00,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:29:00,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:29:00,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:29:00,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:29:00,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:29:00,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:29:00,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:29:00,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:29:00,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:29:00,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:29:00,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:29:00,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:29:00,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:29:00,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:29:00,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:29:00,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:29:00,371 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 [2019-11-07 01:29:00,389 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:29:00,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:29:00,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:29:00,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:29:00,393 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:29:00,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:29:00,394 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:29:00,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:29:00,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:29:00,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:29:00,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:29:00,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:29:00,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:29:00,398 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:29:00,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:29:00,399 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:29:00,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:29:00,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:29:00,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:29:00,400 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:29:00,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:29:00,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:29:00,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:29:00,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:29:00,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:29:00,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:29:00,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:29:00,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:29:00,402 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 [2019-11-07 01:29:00,674 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:29:00,687 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:29:00,690 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:29:00,692 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:29:00,692 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:29:00,693 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/copy-2-u.c [2019-11-07 01:29:00,773 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6752584b7/09a38f34f60b4abbae6e8582d87bade5/FLAG39d6e628d [2019-11-07 01:29:01,226 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:29:01,227 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/copy-2-u.c [2019-11-07 01:29:01,233 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6752584b7/09a38f34f60b4abbae6e8582d87bade5/FLAG39d6e628d [2019-11-07 01:29:01,594 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6752584b7/09a38f34f60b4abbae6e8582d87bade5 [2019-11-07 01:29:01,604 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:29:01,606 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:29:01,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:29:01,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:29:01,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:29:01,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:29:01" (1/1) ... [2019-11-07 01:29:01,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@414f8da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:01, skipping insertion in model container [2019-11-07 01:29:01,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:29:01" (1/1) ... [2019-11-07 01:29:01,623 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:29:01,641 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:29:01,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:29:01,826 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:29:01,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:29:01,883 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:29:01,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:01 WrapperNode [2019-11-07 01:29:01,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:29:01,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:29:01,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:29:01,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:29:01,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:01" (1/1) ... [2019-11-07 01:29:01,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:01" (1/1) ... [2019-11-07 01:29:01,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:01" (1/1) ... [2019-11-07 01:29:01,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:01" (1/1) ... [2019-11-07 01:29:01,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:01" (1/1) ... [2019-11-07 01:29:02,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:01" (1/1) ... [2019-11-07 01:29:02,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:01" (1/1) ... [2019-11-07 01:29:02,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:29:02,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:29:02,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:29:02,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:29:02,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:01" (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 [2019-11-07 01:29:02,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:29:02,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:29:02,058 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:29:02,058 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:29:02,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:29:02,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:29:02,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:29:02,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:29:02,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:29:02,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:29:02,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:29:02,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:29:02,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:29:02,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:29:02,418 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:29:02,418 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-07 01:29:02,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:29:02 BoogieIcfgContainer [2019-11-07 01:29:02,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:29:02,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:29:02,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:29:02,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:29:02,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:29:01" (1/3) ... [2019-11-07 01:29:02,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1470880a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:29:02, skipping insertion in model container [2019-11-07 01:29:02,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:01" (2/3) ... [2019-11-07 01:29:02,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1470880a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:29:02, skipping insertion in model container [2019-11-07 01:29:02,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:29:02" (3/3) ... [2019-11-07 01:29:02,427 INFO L109 eAbstractionObserver]: Analyzing ICFG copy-2-u.c [2019-11-07 01:29:02,437 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:29:02,445 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:29:02,457 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:29:02,481 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:29:02,482 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:29:02,482 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:29:02,482 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:29:02,482 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:29:02,482 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:29:02,482 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:29:02,483 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:29:02,498 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-07 01:29:02,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:29:02,503 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:02,504 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:02,506 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:02,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:02,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1976687735, now seen corresponding path program 1 times [2019-11-07 01:29:02,519 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:02,520 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220114815] [2019-11-07 01:29:02,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:02,594 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:02,594 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108369219] [2019-11-07 01:29:02,594 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 [2019-11-07 01:29:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:02,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:29:02,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:29:02,740 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:29:02,780 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220114815] [2019-11-07 01:29:02,781 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:02,781 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108369219] [2019-11-07 01:29:02,782 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:29:02,782 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-07 01:29:02,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786849112] [2019-11-07 01:29:02,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:29:02,788 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:02,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:29:02,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:29:02,804 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2019-11-07 01:29:02,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:02,888 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2019-11-07 01:29:02,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:29:02,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-07 01:29:02,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:02,899 INFO L225 Difference]: With dead ends: 40 [2019-11-07 01:29:02,900 INFO L226 Difference]: Without dead ends: 22 [2019-11-07 01:29:02,903 INFO L630 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 [2019-11-07 01:29:02,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-07 01:29:02,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-07 01:29:02,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 01:29:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-11-07 01:29:02,946 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 13 [2019-11-07 01:29:02,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:02,947 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-11-07 01:29:02,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:29:02,947 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-11-07 01:29:02,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-07 01:29:02,948 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:02,949 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:03,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:03,154 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:03,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:03,156 INFO L82 PathProgramCache]: Analyzing trace with hash 654064881, now seen corresponding path program 1 times [2019-11-07 01:29:03,156 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:03,156 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396650741] [2019-11-07 01:29:03,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:03,182 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:03,182 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756530870] [2019-11-07 01:29:03,190 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 [2019-11-07 01:29:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:03,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:29:03,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:29:03,332 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:29:03,362 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396650741] [2019-11-07 01:29:03,362 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:03,362 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756530870] [2019-11-07 01:29:03,362 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:29:03,363 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-07 01:29:03,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527565545] [2019-11-07 01:29:03,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:29:03,365 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:03,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:29:03,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:29:03,366 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 6 states. [2019-11-07 01:29:03,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:03,487 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2019-11-07 01:29:03,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:29:03,488 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-07 01:29:03,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:03,491 INFO L225 Difference]: With dead ends: 49 [2019-11-07 01:29:03,491 INFO L226 Difference]: Without dead ends: 34 [2019-11-07 01:29:03,492 INFO L630 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 [2019-11-07 01:29:03,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-07 01:29:03,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-11-07 01:29:03,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-07 01:29:03,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2019-11-07 01:29:03,506 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 17 [2019-11-07 01:29:03,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:03,506 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2019-11-07 01:29:03,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:29:03,507 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2019-11-07 01:29:03,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-07 01:29:03,508 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:03,508 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:03,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:03,711 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:03,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:03,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1291494287, now seen corresponding path program 1 times [2019-11-07 01:29:03,712 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:03,713 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468788932] [2019-11-07 01:29:03,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:03,723 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:03,724 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960000850] [2019-11-07 01:29:03,724 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 [2019-11-07 01:29:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:03,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:29:03,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:29:03,934 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:29:03,986 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468788932] [2019-11-07 01:29:03,986 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:03,986 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960000850] [2019-11-07 01:29:03,986 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1405527069] [2019-11-07 01:29:04,023 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-07 01:29:04,023 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:04,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:04,035 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:04,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:04,170 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:04,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:04,631 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:04,880 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2019-11-07 01:29:04,939 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:29:04,939 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 6] total 18 [2019-11-07 01:29:04,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809824555] [2019-11-07 01:29:04,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 01:29:04,942 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:04,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 01:29:04,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:29:04,943 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 10 states. [2019-11-07 01:29:05,161 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2019-11-07 01:29:05,374 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2019-11-07 01:29:05,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:05,577 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2019-11-07 01:29:05,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-07 01:29:05,578 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-07 01:29:05,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:05,579 INFO L225 Difference]: With dead ends: 53 [2019-11-07 01:29:05,579 INFO L226 Difference]: Without dead ends: 38 [2019-11-07 01:29:05,580 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2019-11-07 01:29:05,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-07 01:29:05,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2019-11-07 01:29:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-07 01:29:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-11-07 01:29:05,593 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 21 [2019-11-07 01:29:05,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:05,593 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-11-07 01:29:05,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 01:29:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-11-07 01:29:05,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 01:29:05,595 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:05,595 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:05,807 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:05,807 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:05,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:05,808 INFO L82 PathProgramCache]: Analyzing trace with hash 234971044, now seen corresponding path program 1 times [2019-11-07 01:29:05,808 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:05,809 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056314462] [2019-11-07 01:29:05,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:05,817 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:05,817 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679997921] [2019-11-07 01:29:05,817 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 [2019-11-07 01:29:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:05,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 01:29:05,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-07 01:29:05,892 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-07 01:29:05,927 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056314462] [2019-11-07 01:29:05,927 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:05,928 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679997921] [2019-11-07 01:29:05,928 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [426788860] [2019-11-07 01:29:05,930 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:29:05,931 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:05,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:05,931 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:05,933 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:05,970 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:06,214 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:29:06,363 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:29:06,375 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:06,377 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:06,615 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2019-11-07 01:29:06,882 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:29:06,882 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 14] total 24 [2019-11-07 01:29:06,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679681045] [2019-11-07 01:29:06,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-07 01:29:06,883 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:06,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-07 01:29:06,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2019-11-07 01:29:06,884 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 24 states. [2019-11-07 01:29:07,170 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2019-11-07 01:29:07,729 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2019-11-07 01:29:08,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:08,481 INFO L93 Difference]: Finished difference Result 92 states and 125 transitions. [2019-11-07 01:29:08,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-07 01:29:08,482 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 25 [2019-11-07 01:29:08,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:08,484 INFO L225 Difference]: With dead ends: 92 [2019-11-07 01:29:08,484 INFO L226 Difference]: Without dead ends: 68 [2019-11-07 01:29:08,487 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2019-11-07 01:29:08,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-07 01:29:08,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2019-11-07 01:29:08,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-07 01:29:08,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2019-11-07 01:29:08,507 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 25 [2019-11-07 01:29:08,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:08,507 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2019-11-07 01:29:08,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-07 01:29:08,508 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2019-11-07 01:29:08,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-07 01:29:08,509 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:08,509 INFO L410 BasicCegarLoop]: trace histogram [12, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:08,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:08,713 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:08,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:08,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1455913956, now seen corresponding path program 2 times [2019-11-07 01:29:08,713 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:08,714 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371044178] [2019-11-07 01:29:08,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:08,722 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:08,723 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942004819] [2019-11-07 01:29:08,723 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 [2019-11-07 01:29:08,776 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:29:08,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:29:08,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:29:08,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-07 01:29:08,820 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-07 01:29:08,862 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371044178] [2019-11-07 01:29:08,862 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:08,862 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942004819] [2019-11-07 01:29:08,863 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1908210741] [2019-11-07 01:29:08,867 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:29:08,867 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:08,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:08,868 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:08,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:08,909 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:09,323 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:29:09,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:09,334 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:09,641 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2019-11-07 01:29:09,881 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:29:09,881 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 14] total 22 [2019-11-07 01:29:09,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250151301] [2019-11-07 01:29:09,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-07 01:29:09,885 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:09,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-07 01:29:09,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2019-11-07 01:29:09,886 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 22 states. [2019-11-07 01:29:10,177 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2019-11-07 01:29:10,455 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2019-11-07 01:29:10,684 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2019-11-07 01:29:10,939 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2019-11-07 01:29:11,233 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2019-11-07 01:29:11,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:11,942 INFO L93 Difference]: Finished difference Result 206 states and 256 transitions. [2019-11-07 01:29:11,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-07 01:29:11,942 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2019-11-07 01:29:11,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:11,945 INFO L225 Difference]: With dead ends: 206 [2019-11-07 01:29:11,945 INFO L226 Difference]: Without dead ends: 164 [2019-11-07 01:29:11,946 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=269, Invalid=1063, Unknown=0, NotChecked=0, Total=1332 [2019-11-07 01:29:11,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-11-07 01:29:11,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 104. [2019-11-07 01:29:11,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-07 01:29:11,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 121 transitions. [2019-11-07 01:29:11,972 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 121 transitions. Word has length 37 [2019-11-07 01:29:11,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:11,972 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 121 transitions. [2019-11-07 01:29:11,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-07 01:29:11,973 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 121 transitions. [2019-11-07 01:29:11,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-07 01:29:11,975 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:11,975 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:12,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:12,178 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:12,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:12,179 INFO L82 PathProgramCache]: Analyzing trace with hash 700042807, now seen corresponding path program 3 times [2019-11-07 01:29:12,179 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:12,179 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729426531] [2019-11-07 01:29:12,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:12,188 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:12,189 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456008187] [2019-11-07 01:29:12,189 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 [2019-11-07 01:29:12,290 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:29:12,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:29:12,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-07 01:29:12,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 15 proven. 310 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2019-11-07 01:29:12,440 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:12,602 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 15 proven. 310 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2019-11-07 01:29:12,603 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729426531] [2019-11-07 01:29:12,603 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:12,603 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456008187] [2019-11-07 01:29:12,604 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1970872571] [2019-11-07 01:29:12,606 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:29:12,606 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:12,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:12,608 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:12,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:12,634 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:12,832 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:29:12,975 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:29:12,981 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:12,982 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:13,278 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2019-11-07 01:29:13,573 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:29:13,574 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2019-11-07 01:29:13,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932012692] [2019-11-07 01:29:13,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-07 01:29:13,575 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:13,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-07 01:29:13,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2019-11-07 01:29:13,579 INFO L87 Difference]: Start difference. First operand 104 states and 121 transitions. Second operand 40 states. [2019-11-07 01:29:13,867 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2019-11-07 01:29:15,826 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 24 [2019-11-07 01:29:16,567 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2019-11-07 01:29:18,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:18,843 INFO L93 Difference]: Finished difference Result 415 states and 520 transitions. [2019-11-07 01:29:18,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-11-07 01:29:18,843 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 77 [2019-11-07 01:29:18,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:18,848 INFO L225 Difference]: With dead ends: 415 [2019-11-07 01:29:18,848 INFO L226 Difference]: Without dead ends: 349 [2019-11-07 01:29:18,853 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2612 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1512, Invalid=6678, Unknown=0, NotChecked=0, Total=8190 [2019-11-07 01:29:18,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2019-11-07 01:29:18,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 154. [2019-11-07 01:29:18,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-11-07 01:29:18,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 179 transitions. [2019-11-07 01:29:18,893 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 179 transitions. Word has length 77 [2019-11-07 01:29:18,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:18,893 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 179 transitions. [2019-11-07 01:29:18,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-07 01:29:18,893 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 179 transitions. [2019-11-07 01:29:18,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-07 01:29:18,895 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:18,896 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:19,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:19,100 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:19,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:19,100 INFO L82 PathProgramCache]: Analyzing trace with hash -548041961, now seen corresponding path program 4 times [2019-11-07 01:29:19,100 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:19,101 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217940208] [2019-11-07 01:29:19,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:19,131 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:19,132 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758984425] [2019-11-07 01:29:19,132 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 [2019-11-07 01:29:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:29:19,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 01:29:19,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:29:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 1492 trivial. 0 not checked. [2019-11-07 01:29:19,407 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:29:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 1492 trivial. 0 not checked. [2019-11-07 01:29:19,488 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217940208] [2019-11-07 01:29:19,488 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 01:29:19,489 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758984425] [2019-11-07 01:29:19,489 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1568558118] [2019-11-07 01:29:19,491 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 01:29:19,491 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:29:19,491 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:29:19,492 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:29:19,492 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:29:19,507 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:29:19,667 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-07 01:29:19,759 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:29:19,763 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:29:19,767 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:29:19,984 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2019-11-07 01:29:20,202 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:29:20,203 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 14] total 32 [2019-11-07 01:29:20,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245669600] [2019-11-07 01:29:20,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-07 01:29:20,204 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:29:20,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-07 01:29:20,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2019-11-07 01:29:20,206 INFO L87 Difference]: Start difference. First operand 154 states and 179 transitions. Second operand 32 states. [2019-11-07 01:29:20,491 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2019-11-07 01:29:21,588 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2019-11-07 01:29:22,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:29:22,659 INFO L93 Difference]: Finished difference Result 432 states and 606 transitions. [2019-11-07 01:29:22,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-07 01:29:22,660 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 109 [2019-11-07 01:29:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:29:22,663 INFO L225 Difference]: With dead ends: 432 [2019-11-07 01:29:22,663 INFO L226 Difference]: Without dead ends: 291 [2019-11-07 01:29:22,666 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=671, Invalid=2299, Unknown=0, NotChecked=0, Total=2970 [2019-11-07 01:29:22,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2019-11-07 01:29:22,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 288. [2019-11-07 01:29:22,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2019-11-07 01:29:22,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 319 transitions. [2019-11-07 01:29:22,727 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 319 transitions. Word has length 109 [2019-11-07 01:29:22,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:29:22,727 INFO L462 AbstractCegarLoop]: Abstraction has 288 states and 319 transitions. [2019-11-07 01:29:22,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-07 01:29:22,727 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 319 transitions. [2019-11-07 01:29:22,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-11-07 01:29:22,732 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:29:22,732 INFO L410 BasicCegarLoop]: trace histogram [98, 98, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:29:22,935 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:29:22,936 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:29:22,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:29:22,937 INFO L82 PathProgramCache]: Analyzing trace with hash 431166343, now seen corresponding path program 5 times [2019-11-07 01:29:22,937 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:29:22,937 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157824343] [2019-11-07 01:29:22,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:29:22,952 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 01:29:22,952 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816162086] [2019-11-07 01:29:22,952 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