/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:35:12,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:35:12,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:35:12,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:35:12,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:35:12,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:35:12,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:35:12,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:35:12,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:35:12,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:35:12,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:35:12,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:35:12,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:35:12,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:35:12,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:35:12,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:35:12,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:35:12,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:35:12,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:35:12,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:35:12,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:35:12,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:35:12,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:35:12,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:35:12,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:35:12,352 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:35:12,352 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:35:12,353 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:35:12,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:35:12,354 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:35:12,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:35:12,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:35:12,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:35:12,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:35:12,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:35:12,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:35:12,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:35:12,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:35:12,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:35:12,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:35:12,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:35:12,361 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 00:35:12,379 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:35:12,380 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:35:12,382 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:35:12,382 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:35:12,382 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:35:12,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:35:12,382 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:35:12,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:35:12,383 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:35:12,383 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:35:12,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:35:12,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:35:12,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:35:12,385 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:35:12,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:35:12,385 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:35:12,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:35:12,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:35:12,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:35:12,386 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:35:12,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:35:12,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:35:12,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:35:12,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:35:12,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:35:12,387 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:35:12,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:35:12,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:35:12,388 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 00:35:12,693 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:35:12,705 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:35:12,709 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:35:12,710 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:35:12,710 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:35:12,711 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2019-11-07 00:35:12,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5fd3b35d/439541495f2346d199312b06b4985ca2/FLAG00f0361c8 [2019-11-07 00:35:13,181 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:35:13,182 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2019-11-07 00:35:13,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5fd3b35d/439541495f2346d199312b06b4985ca2/FLAG00f0361c8 [2019-11-07 00:35:13,609 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5fd3b35d/439541495f2346d199312b06b4985ca2 [2019-11-07 00:35:13,621 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:35:13,623 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:35:13,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:35:13,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:35:13,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:35:13,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:35:13" (1/1) ... [2019-11-07 00:35:13,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49a1d7a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:13, skipping insertion in model container [2019-11-07 00:35:13,632 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:35:13" (1/1) ... [2019-11-07 00:35:13,640 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:35:13,664 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:35:13,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:35:13,890 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:35:13,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:35:13,928 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:35:13,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:13 WrapperNode [2019-11-07 00:35:13,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:35:13,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:35:13,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:35:13,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:35:14,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:13" (1/1) ... [2019-11-07 00:35:14,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:13" (1/1) ... [2019-11-07 00:35:14,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:13" (1/1) ... [2019-11-07 00:35:14,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:13" (1/1) ... [2019-11-07 00:35:14,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:13" (1/1) ... [2019-11-07 00:35:14,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:13" (1/1) ... [2019-11-07 00:35:14,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:13" (1/1) ... [2019-11-07 00:35:14,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:35:14,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:35:14,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:35:14,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:35:14,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:35:14,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:35:14,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:35:14,103 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:35:14,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:35:14,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 00:35:14,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 00:35:14,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:35:14,104 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:35:14,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:35:14,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:35:14,264 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:35:14,264 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-07 00:35:14,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:35:14 BoogieIcfgContainer [2019-11-07 00:35:14,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:35:14,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:35:14,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:35:14,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:35:14,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:35:13" (1/3) ... [2019-11-07 00:35:14,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4711ef9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:35:14, skipping insertion in model container [2019-11-07 00:35:14,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:35:13" (2/3) ... [2019-11-07 00:35:14,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4711ef9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:35:14, skipping insertion in model container [2019-11-07 00:35:14,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:35:14" (3/3) ... [2019-11-07 00:35:14,273 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.v+cfa-reducer.c [2019-11-07 00:35:14,283 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:35:14,290 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:35:14,300 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:35:14,325 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:35:14,325 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:35:14,325 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:35:14,326 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:35:14,326 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:35:14,326 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:35:14,326 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:35:14,326 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:35:14,342 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-07 00:35:14,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-07 00:35:14,348 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:35:14,349 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:35:14,351 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:35:14,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:35:14,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1277702393, now seen corresponding path program 1 times [2019-11-07 00:35:14,367 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:35:14,367 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476246732] [2019-11-07 00:35:14,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:35:14,441 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 00:35:14,442 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577837858] [2019-11-07 00:35:14,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:35:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:35:14,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:35:14,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:35:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:35:14,580 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:35:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:35:14,629 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476246732] [2019-11-07 00:35:14,630 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 00:35:14,630 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577837858] [2019-11-07 00:35:14,636 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:35:14,636 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2019-11-07 00:35:14,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663004681] [2019-11-07 00:35:14,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:35:14,649 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:35:14,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:35:14,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:35:14,677 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2019-11-07 00:35:14,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:35:14,738 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-11-07 00:35:14,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:35:14,740 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-07 00:35:14,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:35:14,748 INFO L225 Difference]: With dead ends: 26 [2019-11-07 00:35:14,748 INFO L226 Difference]: Without dead ends: 13 [2019-11-07 00:35:14,751 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:35:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-07 00:35:14,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-07 00:35:14,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-07 00:35:14,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-11-07 00:35:14,785 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-11-07 00:35:14,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:35:14,785 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-11-07 00:35:14,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:35:14,785 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-11-07 00:35:14,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 00:35:14,786 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:35:14,786 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:35:14,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:35:14,988 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:35:14,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:35:14,989 INFO L82 PathProgramCache]: Analyzing trace with hash -954130992, now seen corresponding path program 1 times [2019-11-07 00:35:14,990 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:35:14,990 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762965156] [2019-11-07 00:35:14,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:35:15,026 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 00:35:15,026 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681189034] [2019-11-07 00:35:15,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:35:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:35:15,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-07 00:35:15,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:35:15,115 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:35:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:35:15,135 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:35:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:35:15,301 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762965156] [2019-11-07 00:35:15,301 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 00:35:15,302 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681189034] [2019-11-07 00:35:15,303 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [914847065] [2019-11-07 00:35:15,309 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 13 [2019-11-07 00:35:15,346 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-07 00:35:15,347 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-07 00:35:15,539 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-11-07 00:35:15,542 INFO L272 AbstractInterpreter]: Visited 12 different actions 34 times. Merged at 4 different actions 21 times. Widened at 1 different actions 3 times. Performed 92 root evaluator evaluations with a maximum evaluation depth of 6. Performed 92 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 10 variables. [2019-11-07 00:35:15,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:35:15,546 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 00:35:15,546 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:35:15,546 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-07 00:35:15,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131535018] [2019-11-07 00:35:15,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 00:35:15,549 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:35:15,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 00:35:15,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:35:15,550 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2019-11-07 00:35:15,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:35:15,650 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-11-07 00:35:15,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:35:15,651 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2019-11-07 00:35:15,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:35:15,651 INFO L225 Difference]: With dead ends: 17 [2019-11-07 00:35:15,652 INFO L226 Difference]: Without dead ends: 14 [2019-11-07 00:35:15,653 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-11-07 00:35:15,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-07 00:35:15,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-07 00:35:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-07 00:35:15,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-11-07 00:35:15,659 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-11-07 00:35:15,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:35:15,660 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-11-07 00:35:15,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 00:35:15,660 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-11-07 00:35:15,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 00:35:15,661 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:35:15,661 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:35:15,867 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:35:15,868 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:35:15,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:35:15,868 INFO L82 PathProgramCache]: Analyzing trace with hash 486647847, now seen corresponding path program 2 times [2019-11-07 00:35:15,869 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:35:15,869 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150219868] [2019-11-07 00:35:15,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:35:15,896 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 00:35:15,897 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093018954] [2019-11-07 00:35:15,897 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:35:15,942 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 00:35:15,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 00:35:15,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-07 00:35:15,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:35:15,993 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:35:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:35:16,013 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:35:16,127 WARN L860 $PredicateComparison]: unable to prove that (forall ((main_~main__n~0 Int)) (or (= (* main_~main__n~0 (+ main_~main__n~0 1)) (+ (* 2 c_main_~main__sum~0) (* 2 c_main_~main__i~0))) (< c_main_~main__i~0 main_~main__n~0) (< main_~main__n~0 c_main_~main__i~0))) is different from true [2019-11-07 00:35:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2019-11-07 00:35:18,202 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150219868] [2019-11-07 00:35:18,202 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 00:35:18,202 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093018954] [2019-11-07 00:35:18,203 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [207226702] [2019-11-07 00:35:18,203 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-11-07 00:35:18,203 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-11-07 00:35:18,203 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:35:18,204 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-07 00:35:18,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864569150] [2019-11-07 00:35:18,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-07 00:35:18,205 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:35:18,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-07 00:35:18,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=52, Unknown=3, NotChecked=14, Total=90 [2019-11-07 00:35:18,205 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2019-11-07 00:35:18,444 WARN L860 $PredicateComparison]: unable to prove that (and (forall ((main_~main__n~0 Int)) (let ((.cse0 (+ c_main_~main__i~0 1))) (or (= (* main_~main__n~0 (+ main_~main__n~0 1)) (+ (* 2 c_main_~main__sum~0) (* 4 c_main_~main__i~0) 2)) (< main_~main__n~0 .cse0) (< .cse0 main_~main__n~0)))) (or (= (* c_main_~main__n~0 (+ c_main_~main__n~0 1)) (* 2 c_main_~main__sum~0)) (<= c_main_~main__i~0 c_main_~main__n~0)) (forall ((main_~main__n~0 Int)) (or (= (* main_~main__n~0 (+ main_~main__n~0 1)) (+ (* 2 c_main_~main__sum~0) (* 2 c_main_~main__i~0))) (< c_main_~main__i~0 main_~main__n~0) (< main_~main__n~0 c_main_~main__i~0)))) is different from true [2019-11-07 00:35:18,531 WARN L860 $PredicateComparison]: unable to prove that (and (or (= (* c_main_~main__n~0 (+ c_main_~main__n~0 1)) (* 2 c_main_~main__sum~0)) (<= c_main_~main__i~0 c_main_~main__n~0)) (forall ((main_~main__n~0 Int)) (or (= (* main_~main__n~0 (+ main_~main__n~0 1)) (+ (* 2 c_main_~main__sum~0) (* 2 c_main_~main__i~0))) (< c_main_~main__i~0 main_~main__n~0) (< main_~main__n~0 c_main_~main__i~0)))) is different from true [2019-11-07 00:35:18,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:35:18,680 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2019-11-07 00:35:18,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-07 00:35:18,682 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-11-07 00:35:18,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:35:18,683 INFO L225 Difference]: With dead ends: 23 [2019-11-07 00:35:18,683 INFO L226 Difference]: Without dead ends: 18 [2019-11-07 00:35:18,684 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=49, Invalid=113, Unknown=6, NotChecked=72, Total=240 [2019-11-07 00:35:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-07 00:35:18,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-07 00:35:18,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-07 00:35:18,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-11-07 00:35:18,691 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 13 [2019-11-07 00:35:18,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:35:18,691 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-11-07 00:35:18,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-07 00:35:18,691 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-11-07 00:35:18,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-07 00:35:18,692 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:35:18,692 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:35:18,903 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:35:18,904 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:35:18,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:35:18,905 INFO L82 PathProgramCache]: Analyzing trace with hash -2089680281, now seen corresponding path program 3 times [2019-11-07 00:35:18,905 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:35:18,906 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808976970] [2019-11-07 00:35:18,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:35:18,926 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 00:35:18,927 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638744749] [2019-11-07 00:35:18,927 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:35:19,019 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 00:35:19,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 00:35:19,021 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-07 00:35:19,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:35:19,119 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:35:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:35:19,136 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:35:19,567 WARN L860 $PredicateComparison]: unable to prove that (forall ((main_~main__n~0 Int)) (let ((.cse0 (+ c_main_~main__i~0 1))) (or (= (* main_~main__n~0 (+ main_~main__n~0 1)) (+ (* 2 c_main_~main__sum~0) (* 4 c_main_~main__i~0) 2)) (< main_~main__n~0 .cse0) (< .cse0 main_~main__n~0)))) is different from true [2019-11-07 00:35:19,575 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 6 not checked. [2019-11-07 00:35:19,575 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808976970] [2019-11-07 00:35:19,575 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 00:35:19,576 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638744749] [2019-11-07 00:35:19,576 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1880187975] [2019-11-07 00:35:19,576 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-11-07 00:35:19,576 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-11-07 00:35:19,576 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:35:19,577 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-11-07 00:35:19,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263423735] [2019-11-07 00:35:19,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-07 00:35:19,578 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:35:19,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-07 00:35:19,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=126, Unknown=1, NotChecked=22, Total=182 [2019-11-07 00:35:19,578 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 14 states. [2019-11-07 00:35:22,165 WARN L191 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 21 [2019-11-07 00:35:22,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:35:22,166 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2019-11-07 00:35:22,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-07 00:35:22,167 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-11-07 00:35:22,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:35:22,167 INFO L225 Difference]: With dead ends: 20 [2019-11-07 00:35:22,168 INFO L226 Difference]: Without dead ends: 0 [2019-11-07 00:35:22,169 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=90, Invalid=375, Unknown=1, NotChecked=40, Total=506 [2019-11-07 00:35:22,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-07 00:35:22,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-07 00:35:22,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-07 00:35:22,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-07 00:35:22,170 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2019-11-07 00:35:22,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:35:22,170 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-07 00:35:22,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-07 00:35:22,171 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-07 00:35:22,171 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-07 00:35:22,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:35:22,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-07 00:35:28,545 WARN L191 SmtUtils]: Spent 6.13 s on a formula simplification. DAG size of input: 35 DAG size of output: 20 [2019-11-07 00:35:28,554 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-11-07 00:35:28,554 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-11-07 00:35:28,555 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-11-07 00:35:28,555 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-07 00:35:28,555 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-11-07 00:35:28,555 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-11-07 00:35:28,555 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-07 00:35:28,556 INFO L439 ceAbstractionStarter]: At program point L33(lines 25 54) the Hoare annotation is: (and (<= 1 main_~main__n~0) (or (= (* main_~main__n~0 (+ main_~main__n~0 1)) (* 2 main_~main__sum~0)) (<= main_~main__i~0 main_~main__n~0)) (forall ((main_~main__n~0 Int)) (or (= (* main_~main__n~0 (+ main_~main__n~0 1)) (+ (* 2 main_~main__sum~0) (* 2 main_~main__i~0))) (< main_~main__i~0 main_~main__n~0) (< main_~main__n~0 main_~main__i~0)))) [2019-11-07 00:35:28,556 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 8 56) the Hoare annotation is: true [2019-11-07 00:35:28,556 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 8 56) no Hoare annotation was computed. [2019-11-07 00:35:28,556 INFO L443 ceAbstractionStarter]: For program point L20(lines 20 54) no Hoare annotation was computed. [2019-11-07 00:35:28,556 INFO L443 ceAbstractionStarter]: For program point L14(lines 14 55) no Hoare annotation was computed. [2019-11-07 00:35:28,557 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 8 56) no Hoare annotation was computed. [2019-11-07 00:35:28,557 INFO L443 ceAbstractionStarter]: For program point L44(line 44) no Hoare annotation was computed. [2019-11-07 00:35:28,557 INFO L443 ceAbstractionStarter]: For program point L42(lines 42 51) no Hoare annotation was computed. [2019-11-07 00:35:28,557 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2019-11-07 00:35:28,564 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2019-11-07 00:35:28,565 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2019-11-07 00:35:28,565 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2019-11-07 00:35:28,566 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2019-11-07 00:35:28,571 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2019-11-07 00:35:28,572 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2019-11-07 00:35:28,572 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2019-11-07 00:35:28,572 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2019-11-07 00:35:28,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:35:28 BoogieIcfgContainer [2019-11-07 00:35:28,575 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-07 00:35:28,577 INFO L168 Benchmark]: Toolchain (without parser) took 14954.02 ms. Allocated memory was 137.9 MB in the beginning and 233.8 MB in the end (delta: 95.9 MB). Free memory was 103.4 MB in the beginning and 90.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 108.9 MB. Max. memory is 7.1 GB. [2019-11-07 00:35:28,578 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2019-11-07 00:35:28,579 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.34 ms. Allocated memory is still 137.9 MB. Free memory was 103.0 MB in the beginning and 93.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-11-07 00:35:28,580 INFO L168 Benchmark]: Boogie Preprocessor took 115.47 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 93.4 MB in the beginning and 179.6 MB in the end (delta: -86.2 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2019-11-07 00:35:28,581 INFO L168 Benchmark]: RCFGBuilder took 219.92 ms. Allocated memory is still 201.3 MB. Free memory was 179.6 MB in the beginning and 168.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2019-11-07 00:35:28,582 INFO L168 Benchmark]: TraceAbstraction took 14308.86 ms. Allocated memory was 201.3 MB in the beginning and 233.8 MB in the end (delta: 32.5 MB). Free memory was 168.2 MB in the beginning and 90.4 MB in the end (delta: 77.8 MB). Peak memory consumption was 110.3 MB. Max. memory is 7.1 GB. [2019-11-07 00:35:28,587 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 137.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 305.34 ms. Allocated memory is still 137.9 MB. Free memory was 103.0 MB in the beginning and 93.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.47 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 93.4 MB in the beginning and 179.6 MB in the end (delta: -86.2 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 219.92 ms. Allocated memory is still 201.3 MB. Free memory was 179.6 MB in the beginning and 168.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14308.86 ms. Allocated memory was 201.3 MB in the beginning and 233.8 MB in the end (delta: 32.5 MB). Free memory was 168.2 MB in the beginning and 90.4 MB in the end (delta: 77.8 MB). Peak memory consumption was 110.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant [2019-11-07 00:35:28,598 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2019-11-07 00:35:28,599 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2019-11-07 00:35:28,599 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2019-11-07 00:35:28,599 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2019-11-07 00:35:28,602 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2019-11-07 00:35:28,602 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2019-11-07 00:35:28,603 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] [2019-11-07 00:35:28,603 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~main__n~0,QUANTIFIED] Derived loop invariant: (1 <= main__n && (main__n * (main__n + 1) == 2 * main__sum || main__i <= main__n)) && (forall main_~main__n~0 : int :: (main_~main__n~0 * (main_~main__n~0 + 1) == 2 * main__sum + 2 * main__i || main__i < main_~main__n~0) || main_~main__n~0 < main__i) - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 16 locations, 1 error locations. Result: SAFE, OverallTime: 14.2s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 6.1s, HoareTripleCheckerStatistics: 43 SDtfs, 22 SDslu, 125 SDs, 0 SdLazy, 152 SolverSat, 11 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 119 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 12 NumberOfFragments, 42 HoareAnnotationTreeSize, 5 FomulaSimplifications, 208 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 68 FormulaSimplificationTreeSizeReductionInter, 6.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 98 ConstructedInterpolants, 8 QuantifiedInterpolants, 6043 SizeOfPredicates, 20 NumberOfNonLiveVariables, 205 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 10/50 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...