/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/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-tiling/poly1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:48:02,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:48:02,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:48:02,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:48:02,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:48:02,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:48:02,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:48:02,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:48:02,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:48:02,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:48:02,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:48:02,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:48:02,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:48:02,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:48:02,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:48:02,246 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:48:02,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:48:02,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:48:02,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:48:02,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:48:02,260 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:48:02,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:48:02,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:48:02,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:48:02,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:48:02,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:48:02,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:48:02,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:48:02,281 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 [2019-11-23 20:48:02,298 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:48:02,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:48:02,299 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:48:02,299 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:48:02,300 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:48:02,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:48:02,300 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:48:02,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:48:02,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:48:02,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:48:02,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:48:02,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:48:02,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:48:02,301 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:48:02,301 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:48:02,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:48:02,302 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:48:02,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:48:02,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:48:02,302 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:48:02,303 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:48:02,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:48:02,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:48:02,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:48:02,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:48:02,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:48:02,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:48:02,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:48:02,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:48:02,304 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:48:02,574 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:48:02,591 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:48:02,594 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:48:02,596 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:48:02,596 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:48:02,597 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/poly1.c [2019-11-23 20:48:02,679 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/733ebdbf7/2e0ee983bf4b4741a419e00d34e4cfd3/FLAGd8ffc5a03 [2019-11-23 20:48:03,106 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:48:03,106 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/poly1.c [2019-11-23 20:48:03,113 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/733ebdbf7/2e0ee983bf4b4741a419e00d34e4cfd3/FLAGd8ffc5a03 [2019-11-23 20:48:03,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/733ebdbf7/2e0ee983bf4b4741a419e00d34e4cfd3 [2019-11-23 20:48:03,488 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:48:03,489 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:48:03,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:48:03,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:48:03,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:48:03,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:48:03" (1/1) ... [2019-11-23 20:48:03,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b69a6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:03, skipping insertion in model container [2019-11-23 20:48:03,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:48:03" (1/1) ... [2019-11-23 20:48:03,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:48:03,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:48:03,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:48:03,703 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:48:03,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:48:03,736 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:48:03,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:03 WrapperNode [2019-11-23 20:48:03,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:48:03,737 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:48:03,738 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:48:03,738 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:48:03,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:03" (1/1) ... [2019-11-23 20:48:03,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:03" (1/1) ... [2019-11-23 20:48:03,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:48:03,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:48:03,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:48:03,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:48:03,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:03" (1/1) ... [2019-11-23 20:48:03,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:03" (1/1) ... [2019-11-23 20:48:03,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:03" (1/1) ... [2019-11-23 20:48:03,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:03" (1/1) ... [2019-11-23 20:48:03,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:03" (1/1) ... [2019-11-23 20:48:03,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:03" (1/1) ... [2019-11-23 20:48:03,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:03" (1/1) ... [2019-11-23 20:48:03,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:48:03,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:48:03,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:48:03,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:48:03,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:03" (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 20:48:03,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:48:03,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 20:48:03,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:48:03,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:48:03,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:48:04,166 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:48:04,166 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 20:48:04,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:48:04 BoogieIcfgContainer [2019-11-23 20:48:04,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:48:04,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:48:04,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:48:04,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:48:04,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:48:03" (1/3) ... [2019-11-23 20:48:04,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70834381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:48:04, skipping insertion in model container [2019-11-23 20:48:04,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:03" (2/3) ... [2019-11-23 20:48:04,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70834381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:48:04, skipping insertion in model container [2019-11-23 20:48:04,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:48:04" (3/3) ... [2019-11-23 20:48:04,191 INFO L109 eAbstractionObserver]: Analyzing ICFG poly1.c [2019-11-23 20:48:04,213 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:48:04,231 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:48:04,241 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:48:04,264 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:48:04,264 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:48:04,264 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:48:04,264 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:48:04,265 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:48:04,265 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:48:04,265 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:48:04,265 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:48:04,279 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-23 20:48:04,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:48:04,284 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:04,285 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:04,286 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:04,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:04,291 INFO L82 PathProgramCache]: Analyzing trace with hash 126991449, now seen corresponding path program 1 times [2019-11-23 20:48:04,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:04,298 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687379831] [2019-11-23 20:48:04,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:48:04,408 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 20:48:04,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687379831] [2019-11-23 20:48:04,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:48:04,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:48:04,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472794060] [2019-11-23 20:48:04,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:48:04,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:04,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:48:04,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:48:04,427 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2019-11-23 20:48:04,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:04,441 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2019-11-23 20:48:04,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:48:04,442 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-23 20:48:04,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:04,450 INFO L225 Difference]: With dead ends: 27 [2019-11-23 20:48:04,450 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 20:48:04,453 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:48:04,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 20:48:04,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 20:48:04,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 20:48:04,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-11-23 20:48:04,481 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2019-11-23 20:48:04,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:04,481 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-11-23 20:48:04,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:48:04,482 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-11-23 20:48:04,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:48:04,482 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:04,482 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:04,483 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:04,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:04,483 INFO L82 PathProgramCache]: Analyzing trace with hash 121450323, now seen corresponding path program 1 times [2019-11-23 20:48:04,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:04,484 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960451642] [2019-11-23 20:48:04,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:04,511 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:04,511 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1084586385] [2019-11-23 20:48:04,512 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 20:48:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:48:04,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:48:04,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:04,607 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 20:48:04,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960451642] [2019-11-23 20:48:04,608 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:04,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084586385] [2019-11-23 20:48:04,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:48:04,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:48:04,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677504892] [2019-11-23 20:48:04,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:48:04,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:04,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:48:04,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:48:04,612 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2019-11-23 20:48:04,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:04,701 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-11-23 20:48:04,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:48:04,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 20:48:04,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:04,703 INFO L225 Difference]: With dead ends: 21 [2019-11-23 20:48:04,703 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 20:48:04,704 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:48:04,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 20:48:04,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-11-23 20:48:04,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 20:48:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-23 20:48:04,708 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2019-11-23 20:48:04,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:04,709 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-23 20:48:04,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:48:04,709 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-23 20:48:04,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:48:04,710 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:04,710 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:04,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:04,913 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:04,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:04,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1899941007, now seen corresponding path program 1 times [2019-11-23 20:48:04,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:04,915 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497154258] [2019-11-23 20:48:04,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:04,937 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:04,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645557648] [2019-11-23 20:48:04,938 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 20:48:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:48:05,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:48:05,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:48:05,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497154258] [2019-11-23 20:48:05,032 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:05,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645557648] [2019-11-23 20:48:05,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:48:05,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 20:48:05,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554563222] [2019-11-23 20:48:05,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:48:05,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:05,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:48:05,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:48:05,034 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2019-11-23 20:48:05,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:05,141 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-11-23 20:48:05,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:48:05,142 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-23 20:48:05,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:05,142 INFO L225 Difference]: With dead ends: 23 [2019-11-23 20:48:05,143 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 20:48:05,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 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 20:48:05,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 20:48:05,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-11-23 20:48:05,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 20:48:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-11-23 20:48:05,148 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2019-11-23 20:48:05,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:05,148 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-11-23 20:48:05,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:48:05,149 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-11-23 20:48:05,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:48:05,149 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:05,149 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:05,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:05,354 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:05,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:05,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1163175951, now seen corresponding path program 2 times [2019-11-23 20:48:05,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:05,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684933218] [2019-11-23 20:48:05,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:05,367 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:05,367 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747060291] [2019-11-23 20:48:05,367 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 20:48:05,419 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:48:05,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:48:05,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:48:05,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:05,485 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2019-11-23 20:48:05,486 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:05,640 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-11-23 20:48:05,642 INFO L567 ElimStorePlain]: treesize reduction 36, result has 34.5 percent of original size [2019-11-23 20:48:05,642 INFO L464 ElimStorePlain]: Eliminatee v_prenex_1 vanished before elimination [2019-11-23 20:48:05,642 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:05,643 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:19 [2019-11-23 20:48:05,741 INFO L343 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2019-11-23 20:48:05,742 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2019-11-23 20:48:05,743 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:05,772 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:05,773 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:05,773 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-11-23 20:48:05,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:48:05,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684933218] [2019-11-23 20:48:05,834 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:05,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747060291] [2019-11-23 20:48:05,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:48:05,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 20:48:05,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643243561] [2019-11-23 20:48:05,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:48:05,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:05,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:48:05,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:48:05,837 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2019-11-23 20:48:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:06,065 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2019-11-23 20:48:06,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:48:06,066 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-11-23 20:48:06,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:06,067 INFO L225 Difference]: With dead ends: 41 [2019-11-23 20:48:06,067 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 20:48:06,068 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:48:06,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 20:48:06,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2019-11-23 20:48:06,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:48:06,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-23 20:48:06,074 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 12 [2019-11-23 20:48:06,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:06,075 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-23 20:48:06,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:48:06,075 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-23 20:48:06,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:48:06,076 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:06,076 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:06,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:06,287 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:06,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:06,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1528992467, now seen corresponding path program 3 times [2019-11-23 20:48:06,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:06,289 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255626780] [2019-11-23 20:48:06,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:06,303 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:06,304 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240956061] [2019-11-23 20:48:06,304 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 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 20:48:06,366 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:48:06,366 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:48:06,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:48:06,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:06,398 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2019-11-23 20:48:06,399 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:06,541 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2019-11-23 20:48:06,542 INFO L567 ElimStorePlain]: treesize reduction 42, result has 37.3 percent of original size [2019-11-23 20:48:06,542 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_6| vanished before elimination [2019-11-23 20:48:06,543 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:06,543 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:25 [2019-11-23 20:48:06,628 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:06,652 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:06,658 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2019-11-23 20:48:06,659 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:06,669 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:06,669 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:06,692 INFO L567 ElimStorePlain]: treesize reduction 5, result has 86.5 percent of original size [2019-11-23 20:48:06,692 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:06,692 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:85, output treesize:32 [2019-11-23 20:48:06,743 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:06,753 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:06,753 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:07,031 WARN L192 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2019-11-23 20:48:07,032 INFO L343 Elim1Store]: treesize reduction 70, result has 43.1 percent of original size [2019-11-23 20:48:07,033 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 97 [2019-11-23 20:48:07,034 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:07,075 INFO L567 ElimStorePlain]: treesize reduction 38, result has 58.2 percent of original size [2019-11-23 20:48:07,076 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:07,076 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:133, output treesize:53 [2019-11-23 20:48:07,185 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:48:07,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255626780] [2019-11-23 20:48:07,201 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:07,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240956061] [2019-11-23 20:48:07,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:48:07,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-23 20:48:07,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665925227] [2019-11-23 20:48:07,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:48:07,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:07,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:48:07,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:48:07,204 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 13 states. [2019-11-23 20:48:08,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:08,895 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2019-11-23 20:48:08,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:48:08,896 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2019-11-23 20:48:08,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:08,897 INFO L225 Difference]: With dead ends: 63 [2019-11-23 20:48:08,898 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:48:08,899 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:48:08,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:48:08,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2019-11-23 20:48:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:48:08,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 20:48:08,907 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 14 [2019-11-23 20:48:08,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:08,907 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 20:48:08,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:48:08,907 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 20:48:08,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:48:08,908 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:08,908 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:09,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:09,112 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:09,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:09,113 INFO L82 PathProgramCache]: Analyzing trace with hash 2056153321, now seen corresponding path program 4 times [2019-11-23 20:48:09,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:09,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969123885] [2019-11-23 20:48:09,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:09,122 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:09,123 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965756357] [2019-11-23 20:48:09,123 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 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 20:48:09,177 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:48:09,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:48:09,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:48:09,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:09,198 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:09,198 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:09,288 INFO L567 ElimStorePlain]: treesize reduction 5, result has 82.1 percent of original size [2019-11-23 20:48:09,291 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2019-11-23 20:48:09,291 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:09,323 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:09,323 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:09,323 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:19 [2019-11-23 20:48:09,372 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:09,379 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:09,383 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 48 [2019-11-23 20:48:09,384 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:09,387 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:09,387 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:09,401 INFO L567 ElimStorePlain]: treesize reduction 5, result has 88.9 percent of original size [2019-11-23 20:48:09,402 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:09,402 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:101, output treesize:40 [2019-11-23 20:48:09,433 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:09,446 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:09,447 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:09,448 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:09,459 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 46 [2019-11-23 20:48:09,460 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:09,463 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:09,463 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:09,481 INFO L567 ElimStorePlain]: treesize reduction 5, result has 87.5 percent of original size [2019-11-23 20:48:09,482 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:09,482 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:35 [2019-11-23 20:48:09,521 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:09,533 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:09,534 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:09,760 WARN L192 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2019-11-23 20:48:09,761 INFO L343 Elim1Store]: treesize reduction 98, result has 50.0 percent of original size [2019-11-23 20:48:09,762 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 136 [2019-11-23 20:48:09,764 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:09,822 INFO L567 ElimStorePlain]: treesize reduction 71, result has 44.1 percent of original size [2019-11-23 20:48:09,823 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:09,823 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:133, output treesize:56 [2019-11-23 20:48:09,929 INFO L343 Elim1Store]: treesize reduction 164, result has 17.6 percent of original size [2019-11-23 20:48:09,930 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 56 [2019-11-23 20:48:09,931 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:09,942 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:09,943 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:09,943 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2019-11-23 20:48:10,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:48:10,036 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969123885] [2019-11-23 20:48:10,037 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:10,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965756357] [2019-11-23 20:48:10,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:48:10,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-23 20:48:10,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419569450] [2019-11-23 20:48:10,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:48:10,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:10,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:48:10,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:48:10,039 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 14 states. [2019-11-23 20:48:11,828 WARN L192 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2019-11-23 20:48:12,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:12,139 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2019-11-23 20:48:12,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:48:12,139 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2019-11-23 20:48:12,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:12,141 INFO L225 Difference]: With dead ends: 88 [2019-11-23 20:48:12,141 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:48:12,142 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:48:12,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:48:12,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 45. [2019-11-23 20:48:12,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 20:48:12,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2019-11-23 20:48:12,152 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 18 [2019-11-23 20:48:12,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:12,152 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2019-11-23 20:48:12,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:48:12,153 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2019-11-23 20:48:12,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:48:12,153 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:12,154 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:12,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:12,360 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:12,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:12,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1704999301, now seen corresponding path program 1 times [2019-11-23 20:48:12,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:12,361 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87174940] [2019-11-23 20:48:12,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:12,368 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:12,368 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044716009] [2019-11-23 20:48:12,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:48:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:48:12,403 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:48:12,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:48:12,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87174940] [2019-11-23 20:48:12,447 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:12,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044716009] [2019-11-23 20:48:12,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:48:12,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 20:48:12,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466284803] [2019-11-23 20:48:12,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:48:12,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:12,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:48:12,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:48:12,449 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 9 states. [2019-11-23 20:48:12,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:12,611 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2019-11-23 20:48:12,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:48:12,612 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-11-23 20:48:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:12,613 INFO L225 Difference]: With dead ends: 90 [2019-11-23 20:48:12,613 INFO L226 Difference]: Without dead ends: 74 [2019-11-23 20:48:12,616 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:48:12,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-23 20:48:12,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 44. [2019-11-23 20:48:12,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:48:12,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-11-23 20:48:12,630 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 20 [2019-11-23 20:48:12,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:12,631 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-11-23 20:48:12,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:48:12,631 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-11-23 20:48:12,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:48:12,632 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:12,636 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:12,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:12,837 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:12,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:12,838 INFO L82 PathProgramCache]: Analyzing trace with hash -237643391, now seen corresponding path program 2 times [2019-11-23 20:48:12,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:12,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310723275] [2019-11-23 20:48:12,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:12,846 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:12,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480583963] [2019-11-23 20:48:12,846 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 20:48:12,902 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:48:12,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:48:12,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:48:12,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:12,934 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2019-11-23 20:48:12,935 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:12,952 INFO L567 ElimStorePlain]: treesize reduction 36, result has 34.5 percent of original size [2019-11-23 20:48:12,952 INFO L464 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2019-11-23 20:48:12,952 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:12,952 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:19 [2019-11-23 20:48:12,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:12,980 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:12,989 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 48 [2019-11-23 20:48:12,990 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:12,993 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:12,993 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:13,009 INFO L567 ElimStorePlain]: treesize reduction 5, result has 88.9 percent of original size [2019-11-23 20:48:13,009 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:13,009 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:101, output treesize:40 [2019-11-23 20:48:13,065 INFO L343 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2019-11-23 20:48:13,066 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2019-11-23 20:48:13,067 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:13,072 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:13,072 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:13,073 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2019-11-23 20:48:13,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:48:13,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310723275] [2019-11-23 20:48:13,182 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:13,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480583963] [2019-11-23 20:48:13,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:48:13,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-23 20:48:13,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117077909] [2019-11-23 20:48:13,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:48:13,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:13,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:48:13,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:48:13,184 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 13 states. [2019-11-23 20:48:13,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:13,620 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2019-11-23 20:48:13,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:48:13,625 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-11-23 20:48:13,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:13,626 INFO L225 Difference]: With dead ends: 89 [2019-11-23 20:48:13,626 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:48:13,627 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:48:13,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:48:13,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 44. [2019-11-23 20:48:13,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:48:13,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-11-23 20:48:13,646 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 20 [2019-11-23 20:48:13,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:13,646 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-11-23 20:48:13,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:48:13,646 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-11-23 20:48:13,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:48:13,649 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:13,649 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:13,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:13,851 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:13,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:13,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1923768199, now seen corresponding path program 5 times [2019-11-23 20:48:13,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:13,852 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622442982] [2019-11-23 20:48:13,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:13,859 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:13,859 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369250072] [2019-11-23 20:48:13,860 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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