/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/init-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:20:39,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:20:39,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:20:39,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:20:39,363 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:20:39,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:20:39,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:20:39,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:20:39,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:20:39,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:20:39,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:20:39,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:20:39,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:20:39,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:20:39,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:20:39,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:20:39,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:20:39,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:20:39,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:20:39,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:20:39,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:20:39,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:20:39,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:20:39,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:20:39,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:20:39,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:20:39,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:20:39,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:20:39,423 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-23 23:20:39,456 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:20:39,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:20:39,456 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:20:39,460 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:20:39,460 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:20:39,460 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:20:39,460 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:20:39,461 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:20:39,461 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:20:39,461 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:20:39,461 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:20:39,461 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:20:39,462 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:20:39,463 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:20:39,463 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:20:39,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:20:39,464 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:20:39,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:20:39,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:20:39,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:20:39,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:20:39,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:20:39,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:20:39,465 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:20:39,466 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:20:39,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:20:39,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:20:39,466 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:20:39,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:20:39,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:20:39,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:20:39,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:20:39,467 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:20:39,467 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:20:39,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:20:39,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:20:39,472 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:20:39,472 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:20:39,778 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:20:39,801 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:20:39,805 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:20:39,807 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:20:39,807 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:20:39,808 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-3-u.c [2019-11-23 23:20:39,870 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/885e32320/0e7ed42906a2400b824890ebc4dc25f4/FLAG4a7b87cd0 [2019-11-23 23:20:40,324 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:20:40,325 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-3-u.c [2019-11-23 23:20:40,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/885e32320/0e7ed42906a2400b824890ebc4dc25f4/FLAG4a7b87cd0 [2019-11-23 23:20:40,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/885e32320/0e7ed42906a2400b824890ebc4dc25f4 [2019-11-23 23:20:40,736 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:20:40,738 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:20:40,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:20:40,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:20:40,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:20:40,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:20:40" (1/1) ... [2019-11-23 23:20:40,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68c4a647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:40, skipping insertion in model container [2019-11-23 23:20:40,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:20:40" (1/1) ... [2019-11-23 23:20:40,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:20:40,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:20:40,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:20:40,974 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:20:40,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:20:41,012 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:20:41,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:41 WrapperNode [2019-11-23 23:20:41,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:20:41,014 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:20:41,014 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:20:41,014 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:20:41,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:41" (1/1) ... [2019-11-23 23:20:41,101 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:41" (1/1) ... [2019-11-23 23:20:41,123 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:20:41,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:20:41,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:20:41,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:20:41,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:41" (1/1) ... [2019-11-23 23:20:41,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:41" (1/1) ... [2019-11-23 23:20:41,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:41" (1/1) ... [2019-11-23 23:20:41,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:41" (1/1) ... [2019-11-23 23:20:41,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:41" (1/1) ... [2019-11-23 23:20:41,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:41" (1/1) ... [2019-11-23 23:20:41,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:41" (1/1) ... [2019-11-23 23:20:41,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:20:41,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:20:41,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:20:41,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:20:41,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:20:41,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:20:41,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:20:41,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:20:41,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:20:41,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:20:41,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:20:41,572 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:20:41,572 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 23:20:41,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:20:41 BoogieIcfgContainer [2019-11-23 23:20:41,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:20:41,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:20:41,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:20:41,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:20:41,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:20:40" (1/3) ... [2019-11-23 23:20:41,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762cb72e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:20:41, skipping insertion in model container [2019-11-23 23:20:41,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:20:41" (2/3) ... [2019-11-23 23:20:41,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762cb72e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:20:41, skipping insertion in model container [2019-11-23 23:20:41,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:20:41" (3/3) ... [2019-11-23 23:20:41,581 INFO L109 eAbstractionObserver]: Analyzing ICFG init-3-u.c [2019-11-23 23:20:41,591 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:20:41,598 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:20:41,609 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:20:41,630 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:20:41,630 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:20:41,630 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:20:41,630 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:20:41,630 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:20:41,631 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:20:41,631 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:20:41,631 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:20:41,642 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-23 23:20:41,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:20:41,647 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:20:41,648 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:20:41,648 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:20:41,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:20:41,654 INFO L82 PathProgramCache]: Analyzing trace with hash -970074386, now seen corresponding path program 1 times [2019-11-23 23:20:41,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:20:41,662 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735427170] [2019-11-23 23:20:41,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:20:41,727 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:20:41,727 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696712920] [2019-11-23 23:20:41,728 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 [2019-11-23 23:20:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:20:41,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:20:41,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:20:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:20:41,845 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:20:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:20:41,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735427170] [2019-11-23 23:20:41,855 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:20:41,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696712920] [2019-11-23 23:20:41,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:20:41,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-23 23:20:41,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405930806] [2019-11-23 23:20:41,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:20:41,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:20:41,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:20:41,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:20:41,880 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2019-11-23 23:20:41,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:20:41,954 INFO L93 Difference]: Finished difference Result 24 states and 37 transitions. [2019-11-23 23:20:41,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:20:41,956 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-23 23:20:41,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:20:41,966 INFO L225 Difference]: With dead ends: 24 [2019-11-23 23:20:41,966 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 23:20:41,969 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:20:41,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 23:20:41,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 23:20:41,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 23:20:42,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 22 transitions. [2019-11-23 23:20:42,001 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 22 transitions. Word has length 7 [2019-11-23 23:20:42,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:20:42,002 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 22 transitions. [2019-11-23 23:20:42,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:20:42,002 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 22 transitions. [2019-11-23 23:20:42,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 23:20:42,003 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:20:42,003 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:20:42,207 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:20:42,207 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:20:42,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:20:42,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1494654434, now seen corresponding path program 1 times [2019-11-23 23:20:42,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:20:42,210 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006408962] [2019-11-23 23:20:42,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:20:42,215 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:20:42,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461819788] [2019-11-23 23:20:42,216 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 [2019-11-23 23:20:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:20:42,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:20:42,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:20:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:20:42,277 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:20:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:20:42,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006408962] [2019-11-23 23:20:42,294 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:20:42,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461819788] [2019-11-23 23:20:42,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:20:42,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-23 23:20:42,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930739328] [2019-11-23 23:20:42,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 23:20:42,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:20:42,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 23:20:42,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 23:20:42,298 INFO L87 Difference]: Start difference. First operand 15 states and 22 transitions. Second operand 6 states. [2019-11-23 23:20:42,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:20:42,399 INFO L93 Difference]: Finished difference Result 40 states and 61 transitions. [2019-11-23 23:20:42,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 23:20:42,401 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-23 23:20:42,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:20:42,402 INFO L225 Difference]: With dead ends: 40 [2019-11-23 23:20:42,402 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 23:20:42,404 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-23 23:20:42,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 23:20:42,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-11-23 23:20:42,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 23:20:42,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2019-11-23 23:20:42,423 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 11 [2019-11-23 23:20:42,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:20:42,423 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2019-11-23 23:20:42,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 23:20:42,424 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2019-11-23 23:20:42,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 23:20:42,426 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:20:42,427 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:20:42,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:20:42,632 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:20:42,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:20:42,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1967251718, now seen corresponding path program 1 times [2019-11-23 23:20:42,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:20:42,634 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063136346] [2019-11-23 23:20:42,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:20:42,638 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:20:42,639 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674092546] [2019-11-23 23:20:42,639 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 [2019-11-23 23:20:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:20:42,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:20:42,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:20:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 23:20:42,710 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:20:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 23:20:42,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063136346] [2019-11-23 23:20:42,736 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:20:42,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674092546] [2019-11-23 23:20:42,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:20:42,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-23 23:20:42,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702239711] [2019-11-23 23:20:42,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 23:20:42,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:20:42,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 23:20:42,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 23:20:42,739 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 6 states. [2019-11-23 23:20:42,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:20:42,861 INFO L93 Difference]: Finished difference Result 67 states and 101 transitions. [2019-11-23 23:20:42,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 23:20:42,861 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-23 23:20:42,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:20:42,862 INFO L225 Difference]: With dead ends: 67 [2019-11-23 23:20:42,862 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 23:20:42,864 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-23 23:20:42,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 23:20:42,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2019-11-23 23:20:42,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 23:20:42,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2019-11-23 23:20:42,883 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 19 [2019-11-23 23:20:42,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:20:42,883 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2019-11-23 23:20:42,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 23:20:42,883 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2019-11-23 23:20:42,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 23:20:42,884 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:20:42,884 INFO L410 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:20:43,087 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:20:43,088 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:20:43,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:20:43,089 INFO L82 PathProgramCache]: Analyzing trace with hash -156781050, now seen corresponding path program 1 times [2019-11-23 23:20:43,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:20:43,090 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720363504] [2019-11-23 23:20:43,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:20:43,095 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:20:43,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966556610] [2019-11-23 23:20:43,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-23 23:20:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:20:43,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 23:20:43,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:20:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 23:20:43,180 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:20:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 23:20:43,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720363504] [2019-11-23 23:20:43,213 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:20:43,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966556610] [2019-11-23 23:20:43,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [758655081] [2019-11-23 23:20:43,238 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-23 23:20:43,239 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:20:43,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:20:43,252 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:20:43,252 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:20:43,712 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:44,082 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:44,094 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:44,106 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:44,116 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:44,690 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:44,703 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:44,746 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:44,763 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:44,842 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:44,908 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:44,928 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:45,174 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 164 [2019-11-23 23:20:45,284 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 164 [2019-11-23 23:20:45,388 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2019-11-23 23:20:45,541 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 173 [2019-11-23 23:20:45,696 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 173 [2019-11-23 23:20:45,905 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:46,069 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:46,084 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:46,163 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:46,180 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:46,196 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:46,211 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:46,225 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:46,241 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:46,282 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:46,430 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 196 [2019-11-23 23:20:46,561 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 196 [2019-11-23 23:20:47,295 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:47,311 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:47,325 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:47,340 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:47,357 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:47,372 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:47,387 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:47,452 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:47,536 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:47,559 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:47,608 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:47,716 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:48,081 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:48,104 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:48,162 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:48,194 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:48,335 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:48,365 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:48,388 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:48,411 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:48,493 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:48,518 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:48,538 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:48,599 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:48,668 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:48,735 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:48,753 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:48,773 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:48,827 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:48,845 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:48,963 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:48,982 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:49,001 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:49,018 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:49,037 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:49,055 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:49,073 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:49,123 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:49,138 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:49,220 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:49,235 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:49,249 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:49,262 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:49,737 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:49,759 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:49,812 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:49,872 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:49,897 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:49,964 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,002 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,021 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,041 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,141 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,156 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,213 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,231 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,249 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,352 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,372 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,392 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,410 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,548 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,567 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,623 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,730 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,740 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,751 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,761 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,774 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,786 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,802 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,814 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,823 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:50,893 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:51,302 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:51,319 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:51,339 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:51,358 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:51,428 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:51,446 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:51,471 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:51,570 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:51,593 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:51,614 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:51,634 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:51,720 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:51,736 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:51,754 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:51,767 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:51,781 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:51,796 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:51,812 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:51,828 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:51,917 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:51,978 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,115 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,130 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,152 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,180 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,193 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,204 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,241 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,251 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,262 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,286 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,559 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,598 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,611 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,622 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,666 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,701 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,725 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,758 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,771 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,785 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,798 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,811 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,825 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,839 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,850 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,862 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,874 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,886 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:52,897 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:53,076 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:53,118 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:53,138 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:53,152 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:53,174 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:53,317 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:53,323 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:53,359 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:53,367 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:53,478 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:53,497 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:53,738 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:53,746 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:53,824 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:53,884 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:53,903 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:53,934 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:53,989 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:53,994 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:54,353 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:54,415 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:54,420 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:54,450 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:54,455 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:54,550 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:54,599 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:54,606 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:54,613 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:54,620 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:54,693 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:54,961 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:55,009 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:55,112 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:55,122 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:55,216 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:55,226 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:55,292 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:55,440 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:55,535 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-23 23:20:55,709 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:20:55,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 23:20:55,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-11-23 23:20:55,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408243585] [2019-11-23 23:20:55,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 23:20:55,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:20:55,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 23:20:55,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2019-11-23 23:20:55,712 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand 10 states. [2019-11-23 23:20:55,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:20:55,887 INFO L93 Difference]: Finished difference Result 129 states and 181 transitions. [2019-11-23 23:20:55,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 23:20:55,888 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2019-11-23 23:20:55,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:20:55,889 INFO L225 Difference]: With dead ends: 129 [2019-11-23 23:20:55,889 INFO L226 Difference]: Without dead ends: 93 [2019-11-23 23:20:55,890 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-11-23 23:20:55,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-23 23:20:55,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2019-11-23 23:20:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-23 23:20:55,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2019-11-23 23:20:55,906 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 27 [2019-11-23 23:20:55,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:20:55,906 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2019-11-23 23:20:55,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 23:20:55,907 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2019-11-23 23:20:55,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 23:20:55,909 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:20:55,909 INFO L410 BasicCegarLoop]: trace histogram [24, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:20:56,112 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:20:56,113 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:20:56,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:20:56,114 INFO L82 PathProgramCache]: Analyzing trace with hash -624164858, now seen corresponding path program 2 times [2019-11-23 23:20:56,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:20:56,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210031030] [2019-11-23 23:20:56,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:20:56,120 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:20:56,120 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725806894] [2019-11-23 23:20:56,120 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 [2019-11-23 23:20:56,187 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 23:20:56,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 23:20:56,188 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 23:20:56,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:20:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 154 proven. 21 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2019-11-23 23:20:56,265 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:20:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 7 proven. 168 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2019-11-23 23:20:56,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210031030] [2019-11-23 23:20:56,350 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:20:56,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725806894] [2019-11-23 23:20:56,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1419005801] [2019-11-23 23:20:56,353 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-23 23:20:56,354 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:20:56,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:20:56,355 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:20:56,355 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:20:56,497 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:56,720 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:56,740 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:56,748 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:56,756 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:57,028 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:57,112 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:57,155 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:57,167 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:57,217 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:57,230 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:57,255 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:57,838 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:57,852 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:57,940 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,017 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,040 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,060 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,125 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,192 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,210 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,314 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,401 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,444 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,457 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,469 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,521 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,736 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,799 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,806 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,889 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:58,895 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:59,056 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:59,065 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:59,094 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:59,112 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:59,162 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:59,170 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:59,564 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:59,571 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:59,604 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:59,769 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:59,816 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:59,823 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:59,830 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:20:59,944 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,084 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,149 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,154 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,197 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,201 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,371 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,434 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,442 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,450 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,458 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,479 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,733 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,804 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,834 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:00,862 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:01,014 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:01,057 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:01,159 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:01,205 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:01,292 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-23 23:21:01,457 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2019-11-23 23:21:01,563 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:21:01,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 23:21:01,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2019-11-23 23:21:01,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317428100] [2019-11-23 23:21:01,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 23:21:01,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:21:01,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 23:21:01,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2019-11-23 23:21:01,565 INFO L87 Difference]: Start difference. First operand 82 states and 103 transitions. Second operand 18 states. [2019-11-23 23:21:01,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:21:01,877 INFO L93 Difference]: Finished difference Result 261 states and 353 transitions. [2019-11-23 23:21:01,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 23:21:01,878 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2019-11-23 23:21:01,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:21:01,880 INFO L225 Difference]: With dead ends: 261 [2019-11-23 23:21:01,881 INFO L226 Difference]: Without dead ends: 189 [2019-11-23 23:21:01,882 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2019-11-23 23:21:01,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-11-23 23:21:01,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 162. [2019-11-23 23:21:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-23 23:21:01,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 199 transitions. [2019-11-23 23:21:01,915 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 199 transitions. Word has length 43 [2019-11-23 23:21:01,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:21:01,915 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 199 transitions. [2019-11-23 23:21:01,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 23:21:01,915 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 199 transitions. [2019-11-23 23:21:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 23:21:01,919 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:21:01,919 INFO L410 BasicCegarLoop]: trace histogram [56, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:21:02,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:21:02,123 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:21:02,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:21:02,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1950936058, now seen corresponding path program 3 times [2019-11-23 23:21:02,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:21:02,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911451468] [2019-11-23 23:21:02,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:21:02,131 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:21:02,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117820627] [2019-11-23 23:21:02,132 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 [2019-11-23 23:21:02,204 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 23:21:02,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 23:21:02,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 23:21:02,210 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:21:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1788 backedges. 1002 proven. 242 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2019-11-23 23:21:02,451 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:21:02,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1788 backedges. 1002 proven. 242 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2019-11-23 23:21:02,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911451468] [2019-11-23 23:21:02,687 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:21:02,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117820627] [2019-11-23 23:21:02,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1015755190] [2019-11-23 23:21:02,689 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-23 23:21:02,689 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:21:02,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:21:02,689 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:21:02,690 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:21:02,789 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:02,934 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:02,948 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:02,954 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:02,975 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:03,222 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:03,232 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:03,241 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:03,250 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:03,328 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:03,365 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:03,374 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:03,800 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,023 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,037 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,063 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,074 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,084 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,096 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,107 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,163 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,197 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,231 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,403 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,498 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,502 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,508 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,514 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,573 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,610 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,706 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,733 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,739 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,746 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:04,987 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,080 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,124 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,171 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,294 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,333 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,341 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,388 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,483 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,545 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,571 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,577 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,608 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,665 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,671 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,759 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,764 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,774 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:05,840 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:06,036 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:06,119 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:06,235 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:06,354 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:06,362 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:06,370 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:06,378 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:06,385 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:06,526 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-23 23:21:06,748 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2019-11-23 23:21:06,916 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:21:06,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 23:21:06,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2019-11-23 23:21:06,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482593880] [2019-11-23 23:21:06,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 23:21:06,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:21:06,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 23:21:06,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=582, Invalid=1310, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 23:21:06,920 INFO L87 Difference]: Start difference. First operand 162 states and 199 transitions. Second operand 38 states. [2019-11-23 23:21:08,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:21:08,474 INFO L93 Difference]: Finished difference Result 670 states and 783 transitions. [2019-11-23 23:21:08,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-11-23 23:21:08,475 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2019-11-23 23:21:08,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:21:08,481 INFO L225 Difference]: With dead ends: 670 [2019-11-23 23:21:08,481 INFO L226 Difference]: Without dead ends: 543 [2019-11-23 23:21:08,486 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3383 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2975, Invalid=6727, Unknown=0, NotChecked=0, Total=9702 [2019-11-23 23:21:08,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2019-11-23 23:21:08,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 466. [2019-11-23 23:21:08,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2019-11-23 23:21:08,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 571 transitions. [2019-11-23 23:21:08,526 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 571 transitions. Word has length 75 [2019-11-23 23:21:08,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:21:08,526 INFO L462 AbstractCegarLoop]: Abstraction has 466 states and 571 transitions. [2019-11-23 23:21:08,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 23:21:08,526 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 571 transitions. [2019-11-23 23:21:08,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-11-23 23:21:08,529 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:21:08,529 INFO L410 BasicCegarLoop]: trace histogram [168, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:21:08,736 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:21:08,737 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:21:08,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:21:08,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1513840562, now seen corresponding path program 4 times [2019-11-23 23:21:08,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:21:08,738 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729196070] [2019-11-23 23:21:08,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:21:08,751 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:21:08,751 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736912968] [2019-11-23 23:21:08,751 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 [2019-11-23 23:21:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:21:08,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 23:21:08,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:21:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16204 backedges. 2490 proven. 105 refuted. 0 times theorem prover too weak. 13609 trivial. 0 not checked. [2019-11-23 23:21:09,144 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:21:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16204 backedges. 2490 proven. 105 refuted. 0 times theorem prover too weak. 13609 trivial. 0 not checked. [2019-11-23 23:21:09,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729196070] [2019-11-23 23:21:09,442 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:21:09,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736912968] [2019-11-23 23:21:09,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1885208239] [2019-11-23 23:21:09,443 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-23 23:21:09,443 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:21:09,444 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:21:09,444 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:21:09,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:21:09,515 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:09,642 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:09,651 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:09,661 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:09,691 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:09,942 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:09,951 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:09,989 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:09,997 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:10,038 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:10,072 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:10,080 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:11,134 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:11,217 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:11,283 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:11,299 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:11,311 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:11,341 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:11,353 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:11,367 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:11,381 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:11,394 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:11,570 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:11,582 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:11,618 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:11,663 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:11,676 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:11,893 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:11,939 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:11,958 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:11,962 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:11,984 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:12,054 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:12,060 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:12,067 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:12,074 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:12,144 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:12,150 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:12,404 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:12,464 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:12,542 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:12,587 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:12,727 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:12,734 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:12,853 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:12,859 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:12,960 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:13,044 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:13,050 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:13,061 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:13,066 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:13,195 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:13,246 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:13,282 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:13,286 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:13,293 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:13,298 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:13,452 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:13,575 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:13,611 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:13,750 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:13,843 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:13,850 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:13,879 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:13,898 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:21:13,985 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-23 23:21:14,146 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2019-11-23 23:21:14,250 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:21:14,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 23:21:14,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2019-11-23 23:21:14,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19423875] [2019-11-23 23:21:14,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 23:21:14,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:21:14,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 23:21:14,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=1003, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 23:21:14,253 INFO L87 Difference]: Start difference. First operand 466 states and 571 transitions. Second operand 34 states. [2019-11-23 23:21:15,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:21:15,034 INFO L93 Difference]: Finished difference Result 1453 states and 2017 transitions. [2019-11-23 23:21:15,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 23:21:15,034 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 203 [2019-11-23 23:21:15,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:21:15,041 INFO L225 Difference]: With dead ends: 1453 [2019-11-23 23:21:15,041 INFO L226 Difference]: Without dead ends: 1005 [2019-11-23 23:21:15,044 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 568 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1067, Invalid=1903, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 23:21:15,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2019-11-23 23:21:15,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 946. [2019-11-23 23:21:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 946 states. [2019-11-23 23:21:15,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1147 transitions. [2019-11-23 23:21:15,092 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1147 transitions. Word has length 203 [2019-11-23 23:21:15,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:21:15,092 INFO L462 AbstractCegarLoop]: Abstraction has 946 states and 1147 transitions. [2019-11-23 23:21:15,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 23:21:15,093 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1147 transitions. [2019-11-23 23:21:15,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2019-11-23 23:21:15,099 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:21:15,099 INFO L410 BasicCegarLoop]: trace histogram [360, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:21:15,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:21:15,305 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:21:15,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:21:15,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1970387022, now seen corresponding path program 5 times [2019-11-23 23:21:15,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:21:15,307 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114854874] [2019-11-23 23:21:15,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:21:15,322 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 23:21:15,322 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195846568] [2019-11-23 23:21:15,322 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