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-examples/standard_init8_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:45:14,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:45:14,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:45:14,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:45:14,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:45:14,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:45:14,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:45:14,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:45:14,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:45:14,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:45:14,158 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:45:14,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:45:14,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:45:14,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:45:14,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:45:14,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:45:14,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:45:14,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:45:14,166 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:45:14,168 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:45:14,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:45:14,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:45:14,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:45:14,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:45:14,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:45:14,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:45:14,184 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:45:14,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:45:14,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:45:14,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:45:14,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:45:14,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:45:14,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:45:14,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:45:14,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:45:14,194 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:45:14,195 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 [2019-10-14 21:45:14,223 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:45:14,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:45:14,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:45:14,227 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:45:14,227 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:45:14,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:45:14,228 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:45:14,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:45:14,228 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:45:14,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:45:14,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:45:14,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:45:14,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:45:14,229 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:45:14,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:45:14,230 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:45:14,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:45:14,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:45:14,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:45:14,231 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:45:14,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:45:14,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:45:14,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:45:14,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:45:14,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:45:14,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:45:14,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:45:14,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:45:14,234 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:45:14,505 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:45:14,517 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:45:14,521 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:45:14,522 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:45:14,522 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:45:14,523 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init8_ground-2.i [2019-10-14 21:45:14,596 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67482f2c3/c8ab4dc4d3a6432d8d76a920d1ea0eab/FLAG81f7714a6 [2019-10-14 21:45:15,036 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:45:15,036 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init8_ground-2.i [2019-10-14 21:45:15,045 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67482f2c3/c8ab4dc4d3a6432d8d76a920d1ea0eab/FLAG81f7714a6 [2019-10-14 21:45:15,464 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67482f2c3/c8ab4dc4d3a6432d8d76a920d1ea0eab [2019-10-14 21:45:15,473 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:45:15,475 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:45:15,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:15,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:45:15,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:45:15,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:15" (1/1) ... [2019-10-14 21:45:15,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b0f51fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:15, skipping insertion in model container [2019-10-14 21:45:15,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:15" (1/1) ... [2019-10-14 21:45:15,488 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:45:15,504 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:45:15,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:15,752 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:45:15,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:15,906 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:45:15,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:15 WrapperNode [2019-10-14 21:45:15,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:15,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:45:15,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:45:15,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:45:15,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:15" (1/1) ... [2019-10-14 21:45:15,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:15" (1/1) ... [2019-10-14 21:45:15,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:15" (1/1) ... [2019-10-14 21:45:15,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:15" (1/1) ... [2019-10-14 21:45:15,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:15" (1/1) ... [2019-10-14 21:45:15,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:15" (1/1) ... [2019-10-14 21:45:15,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:15" (1/1) ... [2019-10-14 21:45:15,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:45:15,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:45:15,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:45:15,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:45:15,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:15" (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 [2019-10-14 21:45:16,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:45:16,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:45:16,023 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:45:16,023 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:45:16,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:45:16,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:45:16,024 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:45:16,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:45:16,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:45:16,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:45:16,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:45:16,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:45:16,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:45:16,338 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:45:16,338 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-14 21:45:16,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:16 BoogieIcfgContainer [2019-10-14 21:45:16,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:45:16,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:45:16,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:45:16,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:45:16,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:45:15" (1/3) ... [2019-10-14 21:45:16,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52fafed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:16, skipping insertion in model container [2019-10-14 21:45:16,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:15" (2/3) ... [2019-10-14 21:45:16,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52fafed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:16, skipping insertion in model container [2019-10-14 21:45:16,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:16" (3/3) ... [2019-10-14 21:45:16,347 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-2.i [2019-10-14 21:45:16,356 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:45:16,363 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:45:16,373 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:45:16,394 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:45:16,395 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:45:16,395 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:45:16,395 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:45:16,395 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:45:16,395 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:45:16,395 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:45:16,395 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:45:16,412 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-10-14 21:45:16,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:45:16,419 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:16,420 INFO L380 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] [2019-10-14 21:45:16,422 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:16,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:16,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1916738342, now seen corresponding path program 1 times [2019-10-14 21:45:16,436 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:16,436 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156142892] [2019-10-14 21:45:16,437 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:16,437 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:16,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:16,597 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156142892] [2019-10-14 21:45:16,598 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:16,598 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:45:16,598 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795571609] [2019-10-14 21:45:16,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:45:16,603 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:16,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:45:16,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:45:16,619 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2019-10-14 21:45:16,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:16,750 INFO L93 Difference]: Finished difference Result 67 states and 102 transitions. [2019-10-14 21:45:16,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:45:16,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2019-10-14 21:45:16,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:16,761 INFO L225 Difference]: With dead ends: 67 [2019-10-14 21:45:16,761 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 21:45:16,765 INFO L600 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 [2019-10-14 21:45:16,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 21:45:16,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-14 21:45:16,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:45:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2019-10-14 21:45:16,801 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 27 [2019-10-14 21:45:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:16,802 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2019-10-14 21:45:16,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:45:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2019-10-14 21:45:16,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:45:16,804 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:16,804 INFO L380 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] [2019-10-14 21:45:16,804 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:16,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:16,805 INFO L82 PathProgramCache]: Analyzing trace with hash -330794466, now seen corresponding path program 1 times [2019-10-14 21:45:16,805 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:16,806 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120317948] [2019-10-14 21:45:16,806 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:16,806 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:16,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:16,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120317948] [2019-10-14 21:45:16,882 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:16,882 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:45:16,883 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818843909] [2019-10-14 21:45:16,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:45:16,885 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:16,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:45:16,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:16,886 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2019-10-14 21:45:17,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:17,012 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2019-10-14 21:45:17,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:45:17,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-14 21:45:17,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:17,014 INFO L225 Difference]: With dead ends: 65 [2019-10-14 21:45:17,015 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 21:45:17,016 INFO L600 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 [2019-10-14 21:45:17,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 21:45:17,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-14 21:45:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:45:17,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2019-10-14 21:45:17,025 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 27 [2019-10-14 21:45:17,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:17,025 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2019-10-14 21:45:17,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:45:17,026 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2019-10-14 21:45:17,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:45:17,027 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:17,027 INFO L380 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:17,027 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:17,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:17,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1167956326, now seen corresponding path program 1 times [2019-10-14 21:45:17,028 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:17,028 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813655108] [2019-10-14 21:45:17,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:17,029 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:17,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:45:17,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813655108] [2019-10-14 21:45:17,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604104427] [2019-10-14 21:45:17,122 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 [2019-10-14 21:45:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:17,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:45:17,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:45:17,232 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:17,232 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:45:17,232 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83231940] [2019-10-14 21:45:17,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:45:17,234 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:17,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:45:17,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:17,240 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 6 states. [2019-10-14 21:45:17,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:17,434 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2019-10-14 21:45:17,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:45:17,435 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2019-10-14 21:45:17,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:17,437 INFO L225 Difference]: With dead ends: 80 [2019-10-14 21:45:17,437 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 21:45:17,438 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:17,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 21:45:17,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-14 21:45:17,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 21:45:17,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2019-10-14 21:45:17,447 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 35 [2019-10-14 21:45:17,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:17,447 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2019-10-14 21:45:17,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:45:17,447 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2019-10-14 21:45:17,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 21:45:17,449 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:17,450 INFO L380 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:17,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:17,651 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:17,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1255820446, now seen corresponding path program 2 times [2019-10-14 21:45:17,653 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:17,653 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927072723] [2019-10-14 21:45:17,654 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:17,654 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:17,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:45:17,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927072723] [2019-10-14 21:45:17,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020979619] [2019-10-14 21:45:17,774 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 [2019-10-14 21:45:17,840 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:17,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:17,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:45:17,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:45:17,862 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:17,862 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:45:17,864 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362538989] [2019-10-14 21:45:17,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:45:17,865 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:17,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:45:17,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:45:17,866 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 7 states. [2019-10-14 21:45:18,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:18,019 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2019-10-14 21:45:18,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:45:18,019 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2019-10-14 21:45:18,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:18,021 INFO L225 Difference]: With dead ends: 95 [2019-10-14 21:45:18,021 INFO L226 Difference]: Without dead ends: 56 [2019-10-14 21:45:18,022 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:45:18,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-14 21:45:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-10-14 21:45:18,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-14 21:45:18,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2019-10-14 21:45:18,030 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 43 [2019-10-14 21:45:18,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:18,031 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2019-10-14 21:45:18,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:45:18,031 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2019-10-14 21:45:18,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 21:45:18,033 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:18,033 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 21:45:18,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:18,238 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:18,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:18,239 INFO L82 PathProgramCache]: Analyzing trace with hash 2017193242, now seen corresponding path program 3 times [2019-10-14 21:45:18,239 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:18,239 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948906832] [2019-10-14 21:45:18,240 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:18,240 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:18,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-14 21:45:18,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948906832] [2019-10-14 21:45:18,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231278137] [2019-10-14 21:45:18,369 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 [2019-10-14 21:45:18,483 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:45:18,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:18,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:45:18,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-14 21:45:18,510 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:18,511 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:45:18,511 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003259370] [2019-10-14 21:45:18,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:45:18,512 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:18,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:45:18,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:45:18,513 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 8 states. [2019-10-14 21:45:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:18,697 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2019-10-14 21:45:18,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:45:18,698 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2019-10-14 21:45:18,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:18,699 INFO L225 Difference]: With dead ends: 110 [2019-10-14 21:45:18,699 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 21:45:18,700 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:45:18,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 21:45:18,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-10-14 21:45:18,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-14 21:45:18,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2019-10-14 21:45:18,710 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 51 [2019-10-14 21:45:18,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:18,710 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2019-10-14 21:45:18,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:45:18,711 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2019-10-14 21:45:18,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-14 21:45:18,712 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:18,713 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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] [2019-10-14 21:45:18,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:18,926 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:18,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:18,927 INFO L82 PathProgramCache]: Analyzing trace with hash 544374558, now seen corresponding path program 4 times [2019-10-14 21:45:18,927 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:18,928 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366935665] [2019-10-14 21:45:18,928 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:18,928 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:18,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:45:19,093 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366935665] [2019-10-14 21:45:19,094 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755441503] [2019-10-14 21:45:19,094 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:19,161 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:19,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:19,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:45:19,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:45:19,194 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:19,194 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:45:19,195 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881386004] [2019-10-14 21:45:19,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:45:19,196 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:19,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:45:19,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:19,197 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 9 states. [2019-10-14 21:45:19,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:19,386 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2019-10-14 21:45:19,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:45:19,387 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2019-10-14 21:45:19,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:19,388 INFO L225 Difference]: With dead ends: 125 [2019-10-14 21:45:19,389 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:45:19,390 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:19,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:45:19,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-10-14 21:45:19,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-14 21:45:19,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2019-10-14 21:45:19,399 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 59 [2019-10-14 21:45:19,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:19,399 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2019-10-14 21:45:19,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:45:19,399 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2019-10-14 21:45:19,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-14 21:45:19,401 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:19,401 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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] [2019-10-14 21:45:19,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:19,605 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:19,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:19,606 INFO L82 PathProgramCache]: Analyzing trace with hash 325227418, now seen corresponding path program 5 times [2019-10-14 21:45:19,607 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:19,607 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096515882] [2019-10-14 21:45:19,608 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:19,608 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:19,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-14 21:45:19,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096515882] [2019-10-14 21:45:19,736 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677176476] [2019-10-14 21:45:19,736 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 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 [2019-10-14 21:45:28,584 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 21:45:28,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:28,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:45:28,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-14 21:45:28,613 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:28,614 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:45:28,614 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055601390] [2019-10-14 21:45:28,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:45:28,615 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:28,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:45:28,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:45:28,615 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 10 states. [2019-10-14 21:45:28,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:28,788 INFO L93 Difference]: Finished difference Result 140 states and 163 transitions. [2019-10-14 21:45:28,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:45:28,788 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2019-10-14 21:45:28,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:28,790 INFO L225 Difference]: With dead ends: 140 [2019-10-14 21:45:28,790 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 21:45:28,791 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:45:28,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 21:45:28,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-10-14 21:45:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-14 21:45:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2019-10-14 21:45:28,799 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 67 [2019-10-14 21:45:28,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:28,800 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2019-10-14 21:45:28,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:45:28,800 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2019-10-14 21:45:28,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-14 21:45:28,801 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:28,802 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 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] [2019-10-14 21:45:29,002 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:29,003 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:29,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1206981022, now seen corresponding path program 6 times [2019-10-14 21:45:29,004 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:29,005 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015342320] [2019-10-14 21:45:29,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:29,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:29,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-14 21:45:29,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015342320] [2019-10-14 21:45:29,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80342398] [2019-10-14 21:45:29,208 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-10-14 21:45:30,924 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 21:45:30,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:30,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:45:30,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-14 21:45:30,958 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:30,958 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:45:30,961 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858966256] [2019-10-14 21:45:30,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:45:30,962 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:30,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:45:30,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:45:30,963 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand 11 states. [2019-10-14 21:45:31,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:31,184 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2019-10-14 21:45:31,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:45:31,185 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 75 [2019-10-14 21:45:31,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:31,186 INFO L225 Difference]: With dead ends: 155 [2019-10-14 21:45:31,186 INFO L226 Difference]: Without dead ends: 88 [2019-10-14 21:45:31,188 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:45:31,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-14 21:45:31,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-10-14 21:45:31,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-14 21:45:31,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2019-10-14 21:45:31,198 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 75 [2019-10-14 21:45:31,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:31,199 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2019-10-14 21:45:31,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:45:31,199 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2019-10-14 21:45:31,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-14 21:45:31,200 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:31,200 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 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] [2019-10-14 21:45:31,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:31,402 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:31,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:31,402 INFO L82 PathProgramCache]: Analyzing trace with hash 192305690, now seen corresponding path program 7 times [2019-10-14 21:45:31,403 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:31,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289974083] [2019-10-14 21:45:31,403 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:31,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:31,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-10-14 21:45:31,533 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289974083] [2019-10-14 21:45:31,533 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128253395] [2019-10-14 21:45:31,534 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:31,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:45:31,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:31,628 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-10-14 21:45:31,628 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:31,628 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:45:31,628 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220697634] [2019-10-14 21:45:31,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:45:31,629 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:31,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:45:31,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:45:31,630 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 12 states. [2019-10-14 21:45:31,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:31,854 INFO L93 Difference]: Finished difference Result 170 states and 193 transitions. [2019-10-14 21:45:31,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:45:31,855 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2019-10-14 21:45:31,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:31,856 INFO L225 Difference]: With dead ends: 170 [2019-10-14 21:45:31,856 INFO L226 Difference]: Without dead ends: 96 [2019-10-14 21:45:31,857 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:45:31,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-14 21:45:31,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-10-14 21:45:31,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-10-14 21:45:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2019-10-14 21:45:31,866 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 83 [2019-10-14 21:45:31,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:31,867 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2019-10-14 21:45:31,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:45:31,867 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2019-10-14 21:45:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-14 21:45:31,869 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:31,869 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 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] [2019-10-14 21:45:32,072 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:32,073 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:32,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:32,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1640627170, now seen corresponding path program 8 times [2019-10-14 21:45:32,074 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:32,074 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352248137] [2019-10-14 21:45:32,075 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:32,075 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:32,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2019-10-14 21:45:32,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352248137] [2019-10-14 21:45:32,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934556051] [2019-10-14 21:45:32,244 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 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 [2019-10-14 21:45:32,339 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:32,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:32,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:45:32,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2019-10-14 21:45:32,364 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:32,364 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:45:32,365 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398648607] [2019-10-14 21:45:32,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:45:32,365 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:32,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:45:32,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:45:32,366 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand 13 states. [2019-10-14 21:45:32,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:32,554 INFO L93 Difference]: Finished difference Result 185 states and 208 transitions. [2019-10-14 21:45:32,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:45:32,554 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 91 [2019-10-14 21:45:32,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:32,555 INFO L225 Difference]: With dead ends: 185 [2019-10-14 21:45:32,556 INFO L226 Difference]: Without dead ends: 104 [2019-10-14 21:45:32,556 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:45:32,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-14 21:45:32,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-10-14 21:45:32,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-14 21:45:32,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2019-10-14 21:45:32,565 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 91 [2019-10-14 21:45:32,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:32,566 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2019-10-14 21:45:32,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:45:32,566 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2019-10-14 21:45:32,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-14 21:45:32,567 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:32,568 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 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] [2019-10-14 21:45:32,771 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:32,771 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:32,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:32,772 INFO L82 PathProgramCache]: Analyzing trace with hash -32030566, now seen corresponding path program 9 times [2019-10-14 21:45:32,772 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:32,772 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110918533] [2019-10-14 21:45:32,772 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:32,772 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:32,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2019-10-14 21:45:32,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110918533] [2019-10-14 21:45:32,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307339812] [2019-10-14 21:45:32,922 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true