/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 -i ../../../trunk/examples/svcomp/array-tiling/revcpyswp2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:53:43,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:53:43,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:53:43,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:53:43,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:53:43,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:53:43,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:53:43,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:53:43,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:53:43,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:53:43,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:53:43,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:53:43,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:53:43,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:53:43,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:53:43,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:53:43,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:53:43,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:53:43,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:53:43,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:53:43,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:53:43,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:53:43,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:53:43,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:53:43,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:53:43,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:53:43,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:53:43,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:53:43,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:53:43,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:53:43,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:53:43,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:53:43,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:53:43,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:53:43,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:53:43,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:53:43,240 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 [2019-11-06 18:53:43,270 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:53:43,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:53:43,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:53:43,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:53:43,275 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:53:43,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:53:43,276 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:53:43,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:53:43,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:53:43,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:53:43,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:53:43,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:53:43,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:53:43,280 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:53:43,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:53:43,281 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:53:43,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:53:43,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:53:43,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:53:43,281 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:53:43,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:53:43,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:53:43,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:53:43,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:53:43,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:53:43,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:53:43,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:53:43,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:53:43,286 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:53:43,605 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:53:43,625 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:53:43,630 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:53:43,631 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:53:43,632 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:53:43,632 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/revcpyswp2.c [2019-11-06 18:53:43,701 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8fda4295/d64e7d63d7e94f4d8d35df920ebe1065/FLAGb1e28a3d5 [2019-11-06 18:53:44,133 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:53:44,134 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/revcpyswp2.c [2019-11-06 18:53:44,140 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8fda4295/d64e7d63d7e94f4d8d35df920ebe1065/FLAGb1e28a3d5 [2019-11-06 18:53:44,548 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8fda4295/d64e7d63d7e94f4d8d35df920ebe1065 [2019-11-06 18:53:44,559 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:53:44,561 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:53:44,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:53:44,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:53:44,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:53:44,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:53:44" (1/1) ... [2019-11-06 18:53:44,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7076498d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:44, skipping insertion in model container [2019-11-06 18:53:44,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:53:44" (1/1) ... [2019-11-06 18:53:44,583 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:53:44,606 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:53:44,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:53:44,905 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:53:45,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:53:45,034 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:53:45,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:45 WrapperNode [2019-11-06 18:53:45,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:53:45,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:53:45,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:53:45,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:53:45,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:45" (1/1) ... [2019-11-06 18:53:45,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:45" (1/1) ... [2019-11-06 18:53:45,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:45" (1/1) ... [2019-11-06 18:53:45,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:45" (1/1) ... [2019-11-06 18:53:45,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:45" (1/1) ... [2019-11-06 18:53:45,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:45" (1/1) ... [2019-11-06 18:53:45,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:45" (1/1) ... [2019-11-06 18:53:45,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:53:45,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:53:45,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:53:45,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:53:45,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:45" (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 [2019-11-06 18:53:45,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:53:45,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:53:45,134 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:53:45,135 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:53:45,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:53:45,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 18:53:45,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:53:45,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:53:45,135 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 18:53:45,136 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:53:45,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 18:53:45,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:53:45,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:53:45,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:53:45,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:53:45,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:53:45,503 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:53:45,503 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-06 18:53:45,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:53:45 BoogieIcfgContainer [2019-11-06 18:53:45,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:53:45,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:53:45,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:53:45,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:53:45,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:53:44" (1/3) ... [2019-11-06 18:53:45,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412e9d48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:53:45, skipping insertion in model container [2019-11-06 18:53:45,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:53:45" (2/3) ... [2019-11-06 18:53:45,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412e9d48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:53:45, skipping insertion in model container [2019-11-06 18:53:45,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:53:45" (3/3) ... [2019-11-06 18:53:45,514 INFO L109 eAbstractionObserver]: Analyzing ICFG revcpyswp2.c [2019-11-06 18:53:45,524 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:53:45,532 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:53:45,545 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:53:45,571 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:53:45,571 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:53:45,571 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:53:45,571 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:53:45,571 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:53:45,572 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:53:45,572 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:53:45,572 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:53:45,595 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-11-06 18:53:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:53:45,602 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:45,603 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:45,605 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:45,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:45,611 INFO L82 PathProgramCache]: Analyzing trace with hash -285010775, now seen corresponding path program 1 times [2019-11-06 18:53:45,620 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:45,621 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366030955] [2019-11-06 18:53:45,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:45,847 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366030955] [2019-11-06 18:53:45,848 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:53:45,848 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:53:45,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606112283] [2019-11-06 18:53:45,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:53:45,853 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:45,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:53:45,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:53:45,867 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2019-11-06 18:53:46,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:46,007 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2019-11-06 18:53:46,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:53:46,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-11-06 18:53:46,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:46,018 INFO L225 Difference]: With dead ends: 59 [2019-11-06 18:53:46,019 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 18:53:46,023 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:53:46,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 18:53:46,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-06 18:53:46,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:53:46,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-06 18:53:46,065 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2019-11-06 18:53:46,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:46,066 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-06 18:53:46,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:53:46,066 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-06 18:53:46,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:53:46,067 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:46,068 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:46,068 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:46,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:46,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1627005719, now seen corresponding path program 1 times [2019-11-06 18:53:46,069 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:46,070 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255549140] [2019-11-06 18:53:46,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:46,187 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255549140] [2019-11-06 18:53:46,187 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:53:46,188 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:53:46,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189975804] [2019-11-06 18:53:46,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:53:46,190 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:46,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:53:46,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:53:46,191 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 4 states. [2019-11-06 18:53:46,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:46,309 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2019-11-06 18:53:46,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:53:46,310 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-11-06 18:53:46,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:46,311 INFO L225 Difference]: With dead ends: 51 [2019-11-06 18:53:46,311 INFO L226 Difference]: Without dead ends: 31 [2019-11-06 18:53:46,312 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:53:46,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-06 18:53:46,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-06 18:53:46,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-06 18:53:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-06 18:53:46,320 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2019-11-06 18:53:46,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:46,320 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-06 18:53:46,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:53:46,321 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-06 18:53:46,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 18:53:46,321 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:46,322 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:46,322 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:46,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:46,322 INFO L82 PathProgramCache]: Analyzing trace with hash -381446827, now seen corresponding path program 1 times [2019-11-06 18:53:46,323 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:46,323 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395707315] [2019-11-06 18:53:46,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:53:46,456 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395707315] [2019-11-06 18:53:46,457 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:53:46,457 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 18:53:46,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642360189] [2019-11-06 18:53:46,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:53:46,460 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:46,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:53:46,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:53:46,461 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2019-11-06 18:53:46,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:46,633 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2019-11-06 18:53:46,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:53:46,636 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-11-06 18:53:46,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:46,640 INFO L225 Difference]: With dead ends: 58 [2019-11-06 18:53:46,641 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:53:46,641 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:53:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:53:46,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2019-11-06 18:53:46,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 18:53:46,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-06 18:53:46,678 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2019-11-06 18:53:46,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:46,680 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-06 18:53:46,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:53:46,680 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-06 18:53:46,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 18:53:46,683 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:46,683 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:46,683 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:46,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:46,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1677394545, now seen corresponding path program 1 times [2019-11-06 18:53:46,685 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:46,685 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098744575] [2019-11-06 18:53:46,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 18:53:46,833 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098744575] [2019-11-06 18:53:46,834 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022492559] [2019-11-06 18:53:46,834 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 [2019-11-06 18:53:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:46,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:53:46,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 18:53:46,961 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:53:46,961 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-06 18:53:46,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837448011] [2019-11-06 18:53:46,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:53:46,962 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:46,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:53:46,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:53:46,963 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-11-06 18:53:47,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:47,081 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2019-11-06 18:53:47,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:53:47,082 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2019-11-06 18:53:47,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:47,083 INFO L225 Difference]: With dead ends: 59 [2019-11-06 18:53:47,083 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:53:47,084 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:53:47,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:53:47,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-06 18:53:47,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:53:47,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-11-06 18:53:47,091 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2019-11-06 18:53:47,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:47,091 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-11-06 18:53:47,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:53:47,091 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-11-06 18:53:47,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 18:53:47,092 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:47,093 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:47,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:47,294 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:47,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:47,296 INFO L82 PathProgramCache]: Analyzing trace with hash 760173005, now seen corresponding path program 2 times [2019-11-06 18:53:47,296 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:47,297 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674930591] [2019-11-06 18:53:47,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:53:47,445 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674930591] [2019-11-06 18:53:47,446 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347092243] [2019-11-06 18:53:47,446 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 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 [2019-11-06 18:53:47,513 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:53:47,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:53:47,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:53:47,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:53:47,565 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:53:47,566 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-11-06 18:53:47,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195355757] [2019-11-06 18:53:47,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:53:47,567 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:47,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:53:47,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:53:47,568 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 8 states. [2019-11-06 18:53:47,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:53:47,809 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2019-11-06 18:53:47,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:53:47,810 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-11-06 18:53:47,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:53:47,811 INFO L225 Difference]: With dead ends: 72 [2019-11-06 18:53:47,811 INFO L226 Difference]: Without dead ends: 53 [2019-11-06 18:53:47,813 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:53:47,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-06 18:53:47,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2019-11-06 18:53:47,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:53:47,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-11-06 18:53:47,827 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 30 [2019-11-06 18:53:47,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:53:47,827 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-11-06 18:53:47,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:53:47,828 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-11-06 18:53:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-06 18:53:47,832 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:53:47,832 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:53:48,044 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:53:48,044 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:53:48,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:53:48,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1484472327, now seen corresponding path program 3 times [2019-11-06 18:53:48,046 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:53:48,046 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817209952] [2019-11-06 18:53:48,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:53:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:53:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:49,306 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817209952] [2019-11-06 18:53:49,306 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912661511] [2019-11-06 18:53:49,306 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 [2019-11-06 18:53:49,407 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:53:49,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:53:49,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 65 conjunts are in the unsatisfiable core [2019-11-06 18:53:49,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:53:49,505 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:49,507 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 58 [2019-11-06 18:53:49,508 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:49,528 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:49,529 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:49,529 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:40 [2019-11-06 18:53:49,618 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2019-11-06 18:53:49,618 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:49,655 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:49,656 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:49,657 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:40 [2019-11-06 18:53:49,793 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:49,800 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 39 [2019-11-06 18:53:49,801 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:49,826 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:49,827 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:49,827 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:111, output treesize:72 [2019-11-06 18:53:49,895 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:49,946 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:49,948 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 108 treesize of output 187 [2019-11-06 18:53:49,951 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:50,061 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2019-11-06 18:53:50,062 INFO L567 ElimStorePlain]: treesize reduction 148, result has 44.4 percent of original size [2019-11-06 18:53:50,064 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-06 18:53:50,064 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:171, output treesize:118 [2019-11-06 18:53:50,565 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:53:50,566 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:50,568 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:50,568 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:53:50,573 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:50,582 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:50,583 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 9 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 132 [2019-11-06 18:53:50,584 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:50,675 INFO L567 ElimStorePlain]: treesize reduction 42, result has 76.1 percent of original size [2019-11-06 18:53:50,677 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-06 18:53:50,677 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:189, output treesize:134 [2019-11-06 18:53:50,910 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:50,911 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:50,912 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:50,913 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:50,915 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:50,954 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:50,955 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 4 case distinctions, treesize of input 134 treesize of output 234 [2019-11-06 18:53:50,957 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:51,090 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2019-11-06 18:53:51,090 INFO L567 ElimStorePlain]: treesize reduction 93, result has 67.9 percent of original size [2019-11-06 18:53:51,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:51,094 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:51,096 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:51,101 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-06 18:53:51,102 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:181, output treesize:186 [2019-11-06 18:53:51,102 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:51,103 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:51,105 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:51,220 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:51,221 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:51,221 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:51,228 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:51,233 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:51,235 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:51,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:51,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:51,500 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:51,501 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:51,503 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:51,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:51,506 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:51,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:53,721 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:53,722 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:53,723 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:53,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:53,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:53,729 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:53,730 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:54,274 WARN L191 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2019-11-06 18:53:54,277 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:54,291 INFO L392 ElimStorePlain]: Different costs {54=[v_prenex_4], 88=[|v_#memory_int_21|]} [2019-11-06 18:53:54,301 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:54,311 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:54,312 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 142 [2019-11-06 18:53:54,313 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:54,553 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 99 [2019-11-06 18:53:54,553 INFO L567 ElimStorePlain]: treesize reduction 45, result has 84.7 percent of original size [2019-11-06 18:53:54,561 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:54,562 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:54,563 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:54,575 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:54,575 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 168 [2019-11-06 18:53:54,578 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:54,773 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2019-11-06 18:53:54,774 INFO L567 ElimStorePlain]: treesize reduction 42, result has 83.1 percent of original size [2019-11-06 18:53:54,776 INFO L496 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-2 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2019-11-06 18:53:54,776 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:297, output treesize:192 [2019-11-06 18:53:55,017 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,033 INFO L392 ElimStorePlain]: Different costs {40=[|v_#memory_int_22|], 70=[v_prenex_8]} [2019-11-06 18:53:55,044 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:55,076 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:55,077 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 173 [2019-11-06 18:53:55,078 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:55,335 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 105 [2019-11-06 18:53:55,336 INFO L567 ElimStorePlain]: treesize reduction 56, result has 82.4 percent of original size [2019-11-06 18:53:55,347 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:55,350 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:53:55,414 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:55,415 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 151 treesize of output 238 [2019-11-06 18:53:55,418 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:55,665 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 102 [2019-11-06 18:53:55,666 INFO L567 ElimStorePlain]: treesize reduction 74, result has 79.2 percent of original size [2019-11-06 18:53:55,668 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,670 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,671 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,672 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,674 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,676 INFO L496 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 2 dim-2 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-11-06 18:53:55,676 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 12 variables, input treesize:282, output treesize:252 [2019-11-06 18:53:55,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,679 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,958 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,959 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,960 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,960 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,962 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,962 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,963 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,965 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,967 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,968 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,970 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,971 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,971 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:55,978 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:53:56,478 WARN L191 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 83 [2019-11-06 18:53:56,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 18:53:56,642 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2019-11-06 18:53:56,642 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:53:56,648 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:53:56,649 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:53:56,650 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:3 [2019-11-06 18:53:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:53:56,733 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:53:56,733 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24] total 41 [2019-11-06 18:53:56,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608450705] [2019-11-06 18:53:56,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-06 18:53:56,734 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:53:56,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-06 18:53:56,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2019-11-06 18:53:56,735 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 41 states. [2019-11-06 18:53:59,826 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2019-11-06 18:54:00,217 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2019-11-06 18:54:00,988 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2019-11-06 18:54:01,282 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 66 [2019-11-06 18:54:01,575 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 79 [2019-11-06 18:54:01,800 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 81 [2019-11-06 18:54:02,357 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2019-11-06 18:54:02,807 WARN L191 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2019-11-06 18:54:03,374 WARN L191 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 92 [2019-11-06 18:54:05,712 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 65 [2019-11-06 18:54:24,216 WARN L191 SmtUtils]: Spent 16.18 s on a formula simplification. DAG size of input: 117 DAG size of output: 111