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/loops/eureka_05.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:16:05,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:16:05,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:16:05,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:16:05,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:16:05,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:16:05,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:16:05,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:16:05,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:16:05,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:16:05,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:16:05,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:16:05,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:16:05,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:16:05,177 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:16:05,178 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:16:05,179 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:16:05,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:16:05,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:16:05,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:16:05,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:16:05,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:16:05,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:16:05,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:16:05,196 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:16:05,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:16:05,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:16:05,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:16:05,205 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:16:05,207 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:16:05,207 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:16:05,210 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:16:05,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:16:05,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:16:05,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:16:05,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:16:05,213 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 23:16:05,234 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:16:05,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:16:05,237 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:16:05,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:16:05,237 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:16:05,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:16:05,237 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:16:05,238 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:16:05,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:16:05,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:16:05,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:16:05,239 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:16:05,239 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:16:05,240 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:16:05,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:16:05,240 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:16:05,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:16:05,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:16:05,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:16:05,241 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:16:05,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:16:05,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:16:05,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:16:05,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:16:05,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:16:05,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:16:05,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:16:05,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:16:05,243 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:16:05,558 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:16:05,579 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:16:05,583 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:16:05,584 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:16:05,584 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:16:05,585 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_05.i [2019-10-14 23:16:05,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/697d25e34/6d00aacbe2284be9856bab81442de1c5/FLAG9a2496ab3 [2019-10-14 23:16:06,132 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:16:06,133 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_05.i [2019-10-14 23:16:06,139 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/697d25e34/6d00aacbe2284be9856bab81442de1c5/FLAG9a2496ab3 [2019-10-14 23:16:06,529 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/697d25e34/6d00aacbe2284be9856bab81442de1c5 [2019-10-14 23:16:06,539 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:16:06,541 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:16:06,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:06,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:16:06,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:16:06,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:06" (1/1) ... [2019-10-14 23:16:06,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@618449b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06, skipping insertion in model container [2019-10-14 23:16:06,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:06" (1/1) ... [2019-10-14 23:16:06,557 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:16:06,579 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:16:06,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:06,780 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:16:06,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:06,915 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:16:06,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06 WrapperNode [2019-10-14 23:16:06,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:06,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:16:06,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:16:06,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:16:06,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06" (1/1) ... [2019-10-14 23:16:06,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06" (1/1) ... [2019-10-14 23:16:06,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06" (1/1) ... [2019-10-14 23:16:06,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06" (1/1) ... [2019-10-14 23:16:06,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06" (1/1) ... [2019-10-14 23:16:06,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06" (1/1) ... [2019-10-14 23:16:06,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06" (1/1) ... [2019-10-14 23:16:06,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:16:06,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:16:06,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:16:06,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:16:06,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06" (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 23:16:07,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:16:07,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:16:07,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:16:07,025 INFO L138 BoogieDeclarations]: Found implementation of procedure SelectionSort [2019-10-14 23:16:07,025 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:16:07,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:16:07,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:16:07,025 INFO L130 BoogieDeclarations]: Found specification of procedure SelectionSort [2019-10-14 23:16:07,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:16:07,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:16:07,026 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:16:07,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:16:07,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:16:07,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:16:07,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-14 23:16:07,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:16:07,304 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:16:07,304 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-14 23:16:07,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:07 BoogieIcfgContainer [2019-10-14 23:16:07,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:16:07,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:16:07,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:16:07,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:16:07,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:16:06" (1/3) ... [2019-10-14 23:16:07,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff21738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:07, skipping insertion in model container [2019-10-14 23:16:07,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:06" (2/3) ... [2019-10-14 23:16:07,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff21738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:07, skipping insertion in model container [2019-10-14 23:16:07,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:07" (3/3) ... [2019-10-14 23:16:07,335 INFO L109 eAbstractionObserver]: Analyzing ICFG eureka_05.i [2019-10-14 23:16:07,358 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:16:07,365 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:16:07,385 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:16:07,408 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:16:07,408 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:16:07,408 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:16:07,408 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:16:07,409 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:16:07,409 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:16:07,409 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:16:07,409 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:16:07,425 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-10-14 23:16:07,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:16:07,431 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:07,431 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:07,433 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:07,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:07,438 INFO L82 PathProgramCache]: Analyzing trace with hash 625586084, now seen corresponding path program 1 times [2019-10-14 23:16:07,444 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:07,445 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349204621] [2019-10-14 23:16:07,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:07,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:07,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:07,677 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 23:16:07,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349204621] [2019-10-14 23:16:07,679 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:07,679 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:16:07,679 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232044868] [2019-10-14 23:16:07,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:16:07,686 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:07,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:16:07,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:16:07,704 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2019-10-14 23:16:07,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:07,914 INFO L93 Difference]: Finished difference Result 77 states and 109 transitions. [2019-10-14 23:16:07,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:16:07,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-14 23:16:07,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:07,928 INFO L225 Difference]: With dead ends: 77 [2019-10-14 23:16:07,929 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 23:16:07,933 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:16:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 23:16:07,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2019-10-14 23:16:07,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:16:07,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-14 23:16:07,985 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 18 [2019-10-14 23:16:07,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:07,986 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-14 23:16:07,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:16:07,986 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-14 23:16:07,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:16:07,988 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:07,988 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:07,988 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:07,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:07,989 INFO L82 PathProgramCache]: Analyzing trace with hash 2087778385, now seen corresponding path program 1 times [2019-10-14 23:16:07,989 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:07,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662679767] [2019-10-14 23:16:07,990 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:07,990 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:07,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:08,090 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 23:16:08,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662679767] [2019-10-14 23:16:08,091 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:08,091 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:16:08,092 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161107300] [2019-10-14 23:16:08,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:16:08,096 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:08,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:16:08,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:16:08,097 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2019-10-14 23:16:08,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:08,283 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2019-10-14 23:16:08,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:16:08,283 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-10-14 23:16:08,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:08,285 INFO L225 Difference]: With dead ends: 59 [2019-10-14 23:16:08,285 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 23:16:08,286 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:16:08,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 23:16:08,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2019-10-14 23:16:08,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:16:08,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-10-14 23:16:08,296 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2019-10-14 23:16:08,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:08,296 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-10-14 23:16:08,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:16:08,297 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-10-14 23:16:08,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:16:08,298 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:08,298 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] [2019-10-14 23:16:08,299 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:08,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:08,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1482156659, now seen corresponding path program 1 times [2019-10-14 23:16:08,300 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:08,300 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015345665] [2019-10-14 23:16:08,300 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:08,301 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:08,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:08,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:08,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015345665] [2019-10-14 23:16:08,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003206872] [2019-10-14 23:16:08,412 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 23:16:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:08,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:16:08,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:08,495 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:08,495 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2019-10-14 23:16:08,495 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459617747] [2019-10-14 23:16:08,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:16:08,496 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:08,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:16:08,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:16:08,497 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2019-10-14 23:16:08,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:08,662 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2019-10-14 23:16:08,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:16:08,663 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-14 23:16:08,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:08,664 INFO L225 Difference]: With dead ends: 61 [2019-10-14 23:16:08,664 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 23:16:08,665 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:16:08,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 23:16:08,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2019-10-14 23:16:08,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:16:08,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-14 23:16:08,672 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 20 [2019-10-14 23:16:08,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:08,673 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-14 23:16:08,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:16:08,673 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-14 23:16:08,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 23:16:08,674 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:08,674 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:08,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:08,883 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:08,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:08,884 INFO L82 PathProgramCache]: Analyzing trace with hash -699737067, now seen corresponding path program 2 times [2019-10-14 23:16:08,886 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:08,886 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946316791] [2019-10-14 23:16:08,886 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:08,887 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:08,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:09,037 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946316791] [2019-10-14 23:16:09,037 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953526231] [2019-10-14 23:16:09,038 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 23:16:09,092 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 23:16:09,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:09,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:16:09,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:16:09,120 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:09,120 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2019-10-14 23:16:09,121 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043002725] [2019-10-14 23:16:09,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:16:09,121 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:09,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:16:09,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:16:09,122 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 4 states. [2019-10-14 23:16:09,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:09,159 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2019-10-14 23:16:09,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:16:09,160 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-10-14 23:16:09,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:09,161 INFO L225 Difference]: With dead ends: 51 [2019-10-14 23:16:09,161 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 23:16:09,162 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:16:09,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 23:16:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2019-10-14 23:16:09,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:16:09,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-14 23:16:09,168 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2019-10-14 23:16:09,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:09,168 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-14 23:16:09,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:16:09,169 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-14 23:16:09,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 23:16:09,170 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:09,170 INFO L380 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] [2019-10-14 23:16:09,370 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:09,371 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:09,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1071485395, now seen corresponding path program 1 times [2019-10-14 23:16:09,372 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:09,373 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228972747] [2019-10-14 23:16:09,373 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,373 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:16:09,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228972747] [2019-10-14 23:16:09,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676308654] [2019-10-14 23:16:09,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:09,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:16:09,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:16:09,547 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:09,547 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2019-10-14 23:16:09,547 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059902910] [2019-10-14 23:16:09,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:16:09,548 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:09,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:16:09,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:16:09,550 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-10-14 23:16:09,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:09,746 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2019-10-14 23:16:09,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:16:09,748 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-10-14 23:16:09,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:09,749 INFO L225 Difference]: With dead ends: 62 [2019-10-14 23:16:09,749 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 23:16:09,751 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:16:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 23:16:09,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2019-10-14 23:16:09,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 23:16:09,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-10-14 23:16:09,765 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2019-10-14 23:16:09,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:09,765 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-10-14 23:16:09,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:16:09,766 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-10-14 23:16:09,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:16:09,767 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:09,767 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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 23:16:09,971 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:09,972 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:09,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:09,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1207034289, now seen corresponding path program 2 times [2019-10-14 23:16:09,973 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:09,973 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032583875] [2019-10-14 23:16:09,973 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,973 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:16:10,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032583875] [2019-10-14 23:16:10,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390661474] [2019-10-14 23:16:10,108 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 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 23:16:10,188 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:10,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:10,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:16:10,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:16:10,262 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:10,262 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 23:16:10,263 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128904754] [2019-10-14 23:16:10,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:16:10,263 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:10,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:16:10,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:16:10,264 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 11 states. [2019-10-14 23:16:10,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:10,706 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2019-10-14 23:16:10,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 23:16:10,707 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-10-14 23:16:10,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:10,708 INFO L225 Difference]: With dead ends: 71 [2019-10-14 23:16:10,708 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 23:16:10,709 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:16:10,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 23:16:10,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2019-10-14 23:16:10,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 23:16:10,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2019-10-14 23:16:10,717 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 28 [2019-10-14 23:16:10,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:10,717 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2019-10-14 23:16:10,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:16:10,717 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2019-10-14 23:16:10,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:16:10,718 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:10,718 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:10,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:10,924 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:10,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:10,924 INFO L82 PathProgramCache]: Analyzing trace with hash 413241865, now seen corresponding path program 3 times [2019-10-14 23:16:10,925 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:10,925 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708920541] [2019-10-14 23:16:10,926 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:10,926 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:10,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:16:11,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708920541] [2019-10-14 23:16:11,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397192164] [2019-10-14 23:16:11,029 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:11,082 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:16:11,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:11,083 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:16:11,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-14 23:16:11,134 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:11,134 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2019-10-14 23:16:11,134 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46082623] [2019-10-14 23:16:11,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:16:11,135 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:11,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:16:11,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:16:11,136 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 5 states. [2019-10-14 23:16:11,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:11,197 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2019-10-14 23:16:11,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:16:11,197 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2019-10-14 23:16:11,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:11,199 INFO L225 Difference]: With dead ends: 68 [2019-10-14 23:16:11,199 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 23:16:11,200 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:16:11,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 23:16:11,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2019-10-14 23:16:11,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 23:16:11,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-10-14 23:16:11,208 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 34 [2019-10-14 23:16:11,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:11,209 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-10-14 23:16:11,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:16:11,209 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-10-14 23:16:11,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 23:16:11,210 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:11,210 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 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] [2019-10-14 23:16:11,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:11,414 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:11,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:11,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1744070661, now seen corresponding path program 1 times [2019-10-14 23:16:11,415 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:11,415 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294478225] [2019-10-14 23:16:11,415 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:11,416 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:11,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:11,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:16:11,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294478225] [2019-10-14 23:16:11,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393635213] [2019-10-14 23:16:11,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:11,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:16:11,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:16:11,637 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:11,637 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 9 [2019-10-14 23:16:11,637 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912281376] [2019-10-14 23:16:11,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:16:11,638 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:11,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:16:11,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:16:11,639 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 9 states. [2019-10-14 23:16:11,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:11,888 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2019-10-14 23:16:11,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:16:11,889 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-10-14 23:16:11,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:11,890 INFO L225 Difference]: With dead ends: 91 [2019-10-14 23:16:11,890 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 23:16:11,891 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:16:11,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 23:16:11,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2019-10-14 23:16:11,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 23:16:11,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2019-10-14 23:16:11,899 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 37 [2019-10-14 23:16:11,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:11,899 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2019-10-14 23:16:11,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:16:11,899 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2019-10-14 23:16:11,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 23:16:11,900 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:11,901 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 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] [2019-10-14 23:16:12,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:12,108 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:12,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:12,108 INFO L82 PathProgramCache]: Analyzing trace with hash 108179107, now seen corresponding path program 2 times [2019-10-14 23:16:12,109 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:12,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96963510] [2019-10-14 23:16:12,110 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:12,110 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:12,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 23:16:12,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96963510] [2019-10-14 23:16:12,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369373326] [2019-10-14 23:16:12,337 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:12,394 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:12,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:12,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:16:12,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-14 23:16:12,458 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:12,458 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2019-10-14 23:16:12,459 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110973294] [2019-10-14 23:16:12,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:16:12,459 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:12,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:16:12,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:16:12,460 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 17 states. [2019-10-14 23:16:13,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:13,009 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2019-10-14 23:16:13,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:16:13,009 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2019-10-14 23:16:13,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:13,010 INFO L225 Difference]: With dead ends: 73 [2019-10-14 23:16:13,011 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 23:16:13,012 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:16:13,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 23:16:13,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-10-14 23:16:13,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 23:16:13,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2019-10-14 23:16:13,018 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 39 [2019-10-14 23:16:13,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:13,019 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2019-10-14 23:16:13,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 23:16:13,019 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2019-10-14 23:16:13,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 23:16:13,020 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:13,020 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 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] [2019-10-14 23:16:13,221 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:13,221 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:13,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:13,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1770245419, now seen corresponding path program 3 times [2019-10-14 23:16:13,222 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:13,223 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474057699] [2019-10-14 23:16:13,223 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:13,224 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:13,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 23:16:13,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474057699] [2019-10-14 23:16:13,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252449565] [2019-10-14 23:16:13,385 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:13,426 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:16:13,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:13,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:16:13,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-14 23:16:13,493 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:13,493 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-10-14 23:16:13,493 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466084388] [2019-10-14 23:16:13,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:16:13,494 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:13,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:16:13,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:16:13,494 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 13 states. [2019-10-14 23:16:14,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:14,476 INFO L93 Difference]: Finished difference Result 98 states and 123 transitions. [2019-10-14 23:16:14,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 23:16:14,477 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2019-10-14 23:16:14,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:14,479 INFO L225 Difference]: With dead ends: 98 [2019-10-14 23:16:14,479 INFO L226 Difference]: Without dead ends: 79 [2019-10-14 23:16:14,480 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=370, Invalid=890, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 23:16:14,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-14 23:16:14,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 65. [2019-10-14 23:16:14,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 23:16:14,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2019-10-14 23:16:14,490 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 42 [2019-10-14 23:16:14,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:14,491 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2019-10-14 23:16:14,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:16:14,491 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2019-10-14 23:16:14,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-14 23:16:14,492 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:14,492 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:14,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:14,697 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:14,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:14,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1697026957, now seen corresponding path program 4 times [2019-10-14 23:16:14,698 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:14,698 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694094806] [2019-10-14 23:16:14,699 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:14,699 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:14,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 60 proven. 12 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-14 23:16:14,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694094806] [2019-10-14 23:16:14,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771846577] [2019-10-14 23:16:14,909 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 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 [2019-10-14 23:16:14,983 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:14,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:14,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:16:14,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 49 proven. 20 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:16:15,040 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:15,041 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 15 [2019-10-14 23:16:15,041 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540845543] [2019-10-14 23:16:15,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:16:15,042 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:15,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:16:15,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:16:15,042 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 15 states. [2019-10-14 23:16:15,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:15,774 INFO L93 Difference]: Finished difference Result 145 states and 183 transitions. [2019-10-14 23:16:15,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:16:15,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2019-10-14 23:16:15,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:15,775 INFO L225 Difference]: With dead ends: 145 [2019-10-14 23:16:15,776 INFO L226 Difference]: Without dead ends: 96 [2019-10-14 23:16:15,777 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:16:15,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-14 23:16:15,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2019-10-14 23:16:15,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-14 23:16:15,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2019-10-14 23:16:15,799 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 59 [2019-10-14 23:16:15,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:15,799 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2019-10-14 23:16:15,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:16:15,800 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2019-10-14 23:16:15,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-14 23:16:15,804 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:15,804 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:16,013 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:16,014 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:16,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:16,015 INFO L82 PathProgramCache]: Analyzing trace with hash 705975923, now seen corresponding path program 5 times [2019-10-14 23:16:16,015 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:16,016 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017508768] [2019-10-14 23:16:16,016 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:16,016 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:16,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 9 proven. 157 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-14 23:16:16,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017508768] [2019-10-14 23:16:16,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975395272] [2019-10-14 23:16:16,259 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:16,350 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-10-14 23:16:16,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:16,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 23:16:16,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:16,697 INFO L341 Elim1Store]: treesize reduction 327, result has 9.9 percent of original size [2019-10-14 23:16:16,697 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 61 [2019-10-14 23:16:16,715 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:16,723 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:16,724 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:16:16,724 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:89, output treesize:47 [2019-10-14 23:16:16,925 INFO L341 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2019-10-14 23:16:16,925 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 69 treesize of output 17 [2019-10-14 23:16:16,926 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:16,927 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:16,928 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:16:16,928 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:5 [2019-10-14 23:16:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 121 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-14 23:16:16,975 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:16,975 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2019-10-14 23:16:16,975 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380204454] [2019-10-14 23:16:16,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 23:16:16,976 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:16,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 23:16:16,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:16:16,977 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand 31 states. [2019-10-14 23:16:22,021 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-10-14 23:16:25,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:25,288 INFO L93 Difference]: Finished difference Result 475 states and 614 transitions. [2019-10-14 23:16:25,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2019-10-14 23:16:25,288 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 71 [2019-10-14 23:16:25,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:25,294 INFO L225 Difference]: With dead ends: 475 [2019-10-14 23:16:25,295 INFO L226 Difference]: Without dead ends: 380 [2019-10-14 23:16:25,305 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7015 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2315, Invalid=16867, Unknown=0, NotChecked=0, Total=19182 [2019-10-14 23:16:25,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2019-10-14 23:16:25,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 169. [2019-10-14 23:16:25,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-10-14 23:16:25,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 211 transitions. [2019-10-14 23:16:25,342 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 211 transitions. Word has length 71 [2019-10-14 23:16:25,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:25,343 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 211 transitions. [2019-10-14 23:16:25,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 23:16:25,344 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 211 transitions. [2019-10-14 23:16:25,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-14 23:16:25,349 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:25,349 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:25,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:25,556 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:25,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:25,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1157316605, now seen corresponding path program 1 times [2019-10-14 23:16:25,556 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:25,557 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494989548] [2019-10-14 23:16:25,557 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:25,557 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:25,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:25,703 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 110 proven. 64 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-14 23:16:25,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494989548] [2019-10-14 23:16:25,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569126073] [2019-10-14 23:16:25,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:25,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:16:25,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-14 23:16:25,878 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:25,878 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2019-10-14 23:16:25,878 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281561935] [2019-10-14 23:16:25,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:16:25,879 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:25,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:16:25,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:16:25,880 INFO L87 Difference]: Start difference. First operand 169 states and 211 transitions. Second operand 17 states. [2019-10-14 23:16:27,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:27,549 INFO L93 Difference]: Finished difference Result 450 states and 574 transitions. [2019-10-14 23:16:27,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-14 23:16:27,549 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 74 [2019-10-14 23:16:27,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:27,553 INFO L225 Difference]: With dead ends: 450 [2019-10-14 23:16:27,554 INFO L226 Difference]: Without dead ends: 422 [2019-10-14 23:16:27,555 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=832, Invalid=1924, Unknown=0, NotChecked=0, Total=2756 [2019-10-14 23:16:27,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2019-10-14 23:16:27,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 147. [2019-10-14 23:16:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-10-14 23:16:27,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 179 transitions. [2019-10-14 23:16:27,577 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 179 transitions. Word has length 74 [2019-10-14 23:16:27,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:27,577 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 179 transitions. [2019-10-14 23:16:27,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 23:16:27,577 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 179 transitions. [2019-10-14 23:16:27,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 23:16:27,578 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:27,578 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 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] [2019-10-14 23:16:27,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:27,783 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:27,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:27,784 INFO L82 PathProgramCache]: Analyzing trace with hash -693199339, now seen corresponding path program 2 times [2019-10-14 23:16:27,784 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:27,784 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239859707] [2019-10-14 23:16:27,785 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:27,785 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:27,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-10-14 23:16:28,232 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239859707] [2019-10-14 23:16:28,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126431902] [2019-10-14 23:16:28,233 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:28,327 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:28,327 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:28,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 52 conjunts are in the unsatisfiable core [2019-10-14 23:16:28,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:28,726 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:16:28,727 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:16:28,728 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:16:28,732 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:28,733 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 44 [2019-10-14 23:16:28,734 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:28,741 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:28,742 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:16:28,743 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:30 [2019-10-14 23:16:28,924 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:16:28,926 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:16:28,927 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:16:28,928 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:28,929 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 44 [2019-10-14 23:16:28,930 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:28,939 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:28,940 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:16:28,940 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:30 [2019-10-14 23:16:29,063 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:16:29,064 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:29,065 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 1 case distinctions, treesize of input 46 treesize of output 12 [2019-10-14 23:16:29,065 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:29,072 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:29,073 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:16:29,073 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:12 [2019-10-14 23:16:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 55 proven. 169 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-14 23:16:29,132 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:29,133 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 39 [2019-10-14 23:16:29,133 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051658519] [2019-10-14 23:16:29,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-14 23:16:29,133 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:29,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-14 23:16:29,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 23:16:29,134 INFO L87 Difference]: Start difference. First operand 147 states and 179 transitions. Second operand 39 states. [2019-10-14 23:16:32,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:32,634 INFO L93 Difference]: Finished difference Result 385 states and 486 transitions. [2019-10-14 23:16:32,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-10-14 23:16:32,635 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 78 [2019-10-14 23:16:32,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:32,638 INFO L225 Difference]: With dead ends: 385 [2019-10-14 23:16:32,638 INFO L226 Difference]: Without dead ends: 305 [2019-10-14 23:16:32,641 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1940 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=676, Invalid=6296, Unknown=0, NotChecked=0, Total=6972 [2019-10-14 23:16:32,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2019-10-14 23:16:32,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 224. [2019-10-14 23:16:32,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2019-10-14 23:16:32,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 275 transitions. [2019-10-14 23:16:32,673 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 275 transitions. Word has length 78 [2019-10-14 23:16:32,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:32,673 INFO L462 AbstractCegarLoop]: Abstraction has 224 states and 275 transitions. [2019-10-14 23:16:32,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-14 23:16:32,673 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 275 transitions. [2019-10-14 23:16:32,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-14 23:16:32,675 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:32,675 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:32,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:32,879 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:32,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:32,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1875808890, now seen corresponding path program 1 times [2019-10-14 23:16:32,880 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:32,881 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051683162] [2019-10-14 23:16:32,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:32,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:32,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 4 proven. 127 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-10-14 23:16:33,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051683162] [2019-10-14 23:16:33,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755445860] [2019-10-14 23:16:33,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:33,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:33,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 23:16:33,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:33,711 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:33,712 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2019-10-14 23:16:33,713 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:33,741 INFO L567 ElimStorePlain]: treesize reduction 10, result has 78.3 percent of original size [2019-10-14 23:16:33,742 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:16:33,742 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:36 [2019-10-14 23:16:33,779 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:33,817 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:33,817 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 37 treesize of output 55 [2019-10-14 23:16:33,819 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:33,828 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:33,828 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2019-10-14 23:16:33,829 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:33,854 INFO L567 ElimStorePlain]: treesize reduction 34, result has 43.3 percent of original size [2019-10-14 23:16:33,855 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:16:33,855 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:73, output treesize:26 [2019-10-14 23:16:33,890 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:16:33,892 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2019-10-14 23:16:33,893 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:33,903 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:33,904 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:16:33,904 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:37 [2019-10-14 23:16:33,961 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:16:33,979 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:33,980 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 86 [2019-10-14 23:16:33,982 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:34,013 INFO L567 ElimStorePlain]: treesize reduction 36, result has 57.1 percent of original size [2019-10-14 23:16:34,014 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. [2019-10-14 23:16:34,015 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:48 [2019-10-14 23:16:34,086 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:16:34,097 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:34,098 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 86 [2019-10-14 23:16:34,099 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:34,131 INFO L567 ElimStorePlain]: treesize reduction 36, result has 57.1 percent of original size [2019-10-14 23:16:34,133 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. [2019-10-14 23:16:34,133 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:48 [2019-10-14 23:16:34,172 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:16:34,183 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:34,184 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 86 [2019-10-14 23:16:34,185 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:34,216 INFO L567 ElimStorePlain]: treesize reduction 36, result has 57.1 percent of original size [2019-10-14 23:16:34,217 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. [2019-10-14 23:16:34,217 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:48 [2019-10-14 23:16:34,263 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:16:34,276 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:34,277 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 86 [2019-10-14 23:16:34,278 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:16:34,306 INFO L567 ElimStorePlain]: treesize reduction 36, result has 57.1 percent of original size [2019-10-14 23:16:34,308 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-10-14 23:16:34,308 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:48 [2019-10-14 23:16:40,360 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 33 [2019-10-14 23:16:40,383 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:16:40,387 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:16:40,388 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2019-10-14 23:16:40,389 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-10-14 23:16:40,399 INFO L567 ElimStorePlain]: treesize reduction 16, result has 40.7 percent of original size [2019-10-14 23:16:40,399 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:16:40,400 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:51, output treesize:7 [2019-10-14 23:16:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 4 proven. 94 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2019-10-14 23:16:40,699 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:40,699 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2019-10-14 23:16:40,699 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362968941] [2019-10-14 23:16:40,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 23:16:40,700 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:40,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 23:16:40,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=771, Unknown=2, NotChecked=0, Total=870 [2019-10-14 23:16:40,701 INFO L87 Difference]: Start difference. First operand 224 states and 275 transitions. Second operand 30 states.