java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:48:47,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:48:47,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:48:47,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:48:47,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:48:47,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:48:47,134 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:48:47,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:48:47,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:48:47,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:48:47,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:48:47,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:48:47,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:48:47,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:48:47,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:48:47,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:48:47,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:48:47,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:48:47,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:48:47,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:48:47,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:48:47,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:48:47,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:48:47,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:48:47,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:48:47,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:48:47,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:48:47,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:48:47,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:48:47,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:48:47,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:48:47,181 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:48:47,181 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:48:47,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:48:47,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:48:47,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:48:47,184 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 [2019-10-13 17:48:47,198 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:48:47,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:48:47,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:48:47,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:48:47,201 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:48:47,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:48:47,201 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:48:47,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:48:47,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:48:47,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:48:47,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:48:47,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:48:47,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:48:47,202 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:48:47,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:48:47,203 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:48:47,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:48:47,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:48:47,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:48:47,204 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:48:47,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:48:47,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:48:47,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:48:47,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:48:47,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:48:47,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:48:47,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:48:47,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:48:47,206 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:48:47,502 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:48:47,523 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:48:47,527 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:48:47,528 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:48:47,529 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:48:47,530 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i [2019-10-13 17:48:47,608 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be5bde76b/923a0edd944c4cfc9d81370ca8952d05/FLAGa9215ec67 [2019-10-13 17:48:48,069 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:48:48,069 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i [2019-10-13 17:48:48,077 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be5bde76b/923a0edd944c4cfc9d81370ca8952d05/FLAGa9215ec67 [2019-10-13 17:48:48,483 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be5bde76b/923a0edd944c4cfc9d81370ca8952d05 [2019-10-13 17:48:48,494 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:48:48,496 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:48:48,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:48:48,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:48:48,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:48:48,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:48:48" (1/1) ... [2019-10-13 17:48:48,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@191613fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:48, skipping insertion in model container [2019-10-13 17:48:48,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:48:48" (1/1) ... [2019-10-13 17:48:48,513 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:48:48,530 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:48:48,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:48:48,758 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:48:48,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:48:48,814 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:48:48,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:48 WrapperNode [2019-10-13 17:48:48,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:48:48,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:48:48,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:48:48,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:48:48,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:48" (1/1) ... [2019-10-13 17:48:48,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:48" (1/1) ... [2019-10-13 17:48:48,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:48" (1/1) ... [2019-10-13 17:48:48,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:48" (1/1) ... [2019-10-13 17:48:48,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:48" (1/1) ... [2019-10-13 17:48:48,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:48" (1/1) ... [2019-10-13 17:48:48,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:48" (1/1) ... [2019-10-13 17:48:48,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:48:48,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:48:48,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:48:48,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:48:48,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:48" (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 [2019-10-13 17:48:49,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:48:49,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:48:49,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:48:49,007 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:48:49,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:48:49,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:48:49,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:48:49,008 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:48:49,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:48:49,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:48:49,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:48:49,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:48:49,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:48:49,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:48:49,319 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:48:49,319 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-13 17:48:49,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:48:49 BoogieIcfgContainer [2019-10-13 17:48:49,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:48:49,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:48:49,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:48:49,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:48:49,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:48:48" (1/3) ... [2019-10-13 17:48:49,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ed51030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:48:49, skipping insertion in model container [2019-10-13 17:48:49,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:48" (2/3) ... [2019-10-13 17:48:49,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ed51030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:48:49, skipping insertion in model container [2019-10-13 17:48:49,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:48:49" (3/3) ... [2019-10-13 17:48:49,329 INFO L109 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-2.i [2019-10-13 17:48:49,339 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:48:49,347 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:48:49,358 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:48:49,383 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:48:49,384 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:48:49,384 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:48:49,384 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:48:49,384 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:48:49,384 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:48:49,384 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:48:49,384 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:48:49,400 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-13 17:48:49,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 17:48:49,406 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:49,407 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:49,409 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:49,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:49,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1656037931, now seen corresponding path program 1 times [2019-10-13 17:48:49,421 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:49,422 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999703102] [2019-10-13 17:48:49,422 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:49,422 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:49,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:49,628 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999703102] [2019-10-13 17:48:49,629 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:48:49,629 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:48:49,629 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162973227] [2019-10-13 17:48:49,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:48:49,635 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:49,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:48:49,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:48:49,649 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2019-10-13 17:48:49,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:49,769 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2019-10-13 17:48:49,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:48:49,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-13 17:48:49,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:49,778 INFO L225 Difference]: With dead ends: 46 [2019-10-13 17:48:49,778 INFO L226 Difference]: Without dead ends: 24 [2019-10-13 17:48:49,782 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:48:49,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-13 17:48:49,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-13 17:48:49,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-13 17:48:49,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2019-10-13 17:48:49,828 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 14 [2019-10-13 17:48:49,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:49,829 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2019-10-13 17:48:49,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:48:49,829 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2019-10-13 17:48:49,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 17:48:49,830 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:49,830 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:49,831 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:49,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:49,831 INFO L82 PathProgramCache]: Analyzing trace with hash -533813011, now seen corresponding path program 1 times [2019-10-13 17:48:49,832 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:49,832 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424754065] [2019-10-13 17:48:49,832 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:49,832 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:49,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:49,937 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424754065] [2019-10-13 17:48:49,937 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:48:49,937 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:48:49,938 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52311883] [2019-10-13 17:48:49,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:48:49,940 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:49,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:48:49,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:48:49,941 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 4 states. [2019-10-13 17:48:50,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:50,068 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2019-10-13 17:48:50,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:48:50,069 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-13 17:48:50,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:50,070 INFO L225 Difference]: With dead ends: 45 [2019-10-13 17:48:50,070 INFO L226 Difference]: Without dead ends: 33 [2019-10-13 17:48:50,072 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:48:50,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-13 17:48:50,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2019-10-13 17:48:50,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 17:48:50,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-13 17:48:50,080 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2019-10-13 17:48:50,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:50,081 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-13 17:48:50,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:48:50,081 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-13 17:48:50,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 17:48:50,082 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:50,082 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:50,083 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:50,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:50,083 INFO L82 PathProgramCache]: Analyzing trace with hash -414258795, now seen corresponding path program 1 times [2019-10-13 17:48:50,084 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:50,084 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122402412] [2019-10-13 17:48:50,084 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:50,084 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:50,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:48:50,212 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122402412] [2019-10-13 17:48:50,212 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474691139] [2019-10-13 17:48:50,212 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 [2019-10-13 17:48:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:50,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:48:50,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:48:50,307 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:50,307 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-13 17:48:50,307 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561566211] [2019-10-13 17:48:50,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:48:50,308 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:50,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:48:50,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:48:50,309 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 6 states. [2019-10-13 17:48:50,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:50,476 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2019-10-13 17:48:50,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:48:50,476 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-10-13 17:48:50,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:50,478 INFO L225 Difference]: With dead ends: 56 [2019-10-13 17:48:50,478 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 17:48:50,478 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:48:50,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 17:48:50,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2019-10-13 17:48:50,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-13 17:48:50,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2019-10-13 17:48:50,493 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 22 [2019-10-13 17:48:50,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:50,494 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2019-10-13 17:48:50,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:48:50,495 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2019-10-13 17:48:50,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 17:48:50,497 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:50,497 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:50,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:50,704 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:50,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:50,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1579249427, now seen corresponding path program 2 times [2019-10-13 17:48:50,705 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:50,705 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290305741] [2019-10-13 17:48:50,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:50,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:50,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:48:50,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290305741] [2019-10-13 17:48:50,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506825489] [2019-10-13 17:48:50,852 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 [2019-10-13 17:48:50,902 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:48:50,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:50,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:48:50,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:48:50,930 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:50,931 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 17:48:50,931 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687417194] [2019-10-13 17:48:50,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:48:50,932 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:50,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:48:50,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:48:50,936 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 7 states. [2019-10-13 17:48:51,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:51,060 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2019-10-13 17:48:51,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:48:51,061 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2019-10-13 17:48:51,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:51,062 INFO L225 Difference]: With dead ends: 68 [2019-10-13 17:48:51,062 INFO L226 Difference]: Without dead ends: 51 [2019-10-13 17:48:51,063 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:48:51,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-13 17:48:51,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2019-10-13 17:48:51,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-13 17:48:51,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2019-10-13 17:48:51,071 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 30 [2019-10-13 17:48:51,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:51,071 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2019-10-13 17:48:51,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:48:51,072 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2019-10-13 17:48:51,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-13 17:48:51,073 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:51,073 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:51,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:51,278 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:51,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:51,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1850469483, now seen corresponding path program 3 times [2019-10-13 17:48:51,279 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:51,280 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530028857] [2019-10-13 17:48:51,280 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:51,280 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:51,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 17:48:51,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530028857] [2019-10-13 17:48:51,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211273416] [2019-10-13 17:48:51,381 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:51,423 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 17:48:51,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:51,424 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:48:51,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:51,469 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-10-13 17:48:51,470 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:48:51,473 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:48:51,473 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:48:51,474 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2019-10-13 17:48:51,509 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 34 [2019-10-13 17:48:51,510 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:48:51,523 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 50 treesize of output 33 [2019-10-13 17:48:51,524 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:48:51,577 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:48:51,593 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:48:51,608 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 40 [2019-10-13 17:48:51,609 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-13 17:48:51,648 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:48:51,650 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 6 dim-0 vars, and 3 xjuncts. [2019-10-13 17:48:51,651 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:159, output treesize:108 [2019-10-13 17:48:51,742 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 17:48:51,782 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2019-10-13 17:48:51,784 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:48:51,793 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 21 [2019-10-13 17:48:51,794 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:48:51,803 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 27 [2019-10-13 17:48:51,804 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-13 17:48:51,840 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:48:51,849 INFO L496 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:48:51,850 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 10 variables, input treesize:140, output treesize:3 [2019-10-13 17:48:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 17:48:51,876 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:51,876 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-10-13 17:48:51,876 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314321385] [2019-10-13 17:48:51,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:48:51,877 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:51,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:48:51,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:48:51,878 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand 10 states. [2019-10-13 17:48:52,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:52,913 INFO L93 Difference]: Finished difference Result 114 states and 151 transitions. [2019-10-13 17:48:52,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:48:52,919 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2019-10-13 17:48:52,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:52,922 INFO L225 Difference]: With dead ends: 114 [2019-10-13 17:48:52,922 INFO L226 Difference]: Without dead ends: 80 [2019-10-13 17:48:52,923 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:48:52,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-13 17:48:52,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2019-10-13 17:48:52,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-13 17:48:52,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2019-10-13 17:48:52,932 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 38 [2019-10-13 17:48:52,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:52,932 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2019-10-13 17:48:52,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:48:52,933 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2019-10-13 17:48:52,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 17:48:52,934 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:52,934 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:53,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:53,146 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:53,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:53,146 INFO L82 PathProgramCache]: Analyzing trace with hash 304191085, now seen corresponding path program 1 times [2019-10-13 17:48:53,147 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:53,147 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754299535] [2019-10-13 17:48:53,147 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:53,147 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:53,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 17:48:53,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754299535] [2019-10-13 17:48:53,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116099583] [2019-10-13 17:48:53,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 17:48:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:53,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:48:53,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 17:48:53,349 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:53,350 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-13 17:48:53,350 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377431343] [2019-10-13 17:48:53,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:48:53,351 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:53,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:48:53,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:48:53,353 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand 9 states. [2019-10-13 17:48:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:53,534 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2019-10-13 17:48:53,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:48:53,534 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2019-10-13 17:48:53,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:53,535 INFO L225 Difference]: With dead ends: 104 [2019-10-13 17:48:53,536 INFO L226 Difference]: Without dead ends: 81 [2019-10-13 17:48:53,538 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:48:53,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-13 17:48:53,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2019-10-13 17:48:53,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-13 17:48:53,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2019-10-13 17:48:53,555 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 46 [2019-10-13 17:48:53,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:53,555 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2019-10-13 17:48:53,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:48:53,555 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2019-10-13 17:48:53,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-13 17:48:53,557 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:53,558 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:53,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:53,766 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:53,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:53,766 INFO L82 PathProgramCache]: Analyzing trace with hash -828408681, now seen corresponding path program 2 times [2019-10-13 17:48:53,766 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:53,767 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531054480] [2019-10-13 17:48:53,767 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:53,767 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:53,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-13 17:48:53,889 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531054480] [2019-10-13 17:48:53,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654948783] [2019-10-13 17:48:53,890 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 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 [2019-10-13 17:48:53,947 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:48:53,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:53,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:48:53,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:53,967 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-13 17:48:53,967 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:53,967 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-13 17:48:53,967 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418169921] [2019-10-13 17:48:53,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:48:53,968 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:53,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:48:53,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:48:53,969 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand 10 states. [2019-10-13 17:48:54,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:54,110 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2019-10-13 17:48:54,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:48:54,110 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2019-10-13 17:48:54,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:54,111 INFO L225 Difference]: With dead ends: 118 [2019-10-13 17:48:54,111 INFO L226 Difference]: Without dead ends: 92 [2019-10-13 17:48:54,112 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:48:54,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-13 17:48:54,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2019-10-13 17:48:54,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-13 17:48:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2019-10-13 17:48:54,121 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 54 [2019-10-13 17:48:54,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:54,122 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2019-10-13 17:48:54,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:48:54,122 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2019-10-13 17:48:54,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-13 17:48:54,123 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:54,123 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:54,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:54,332 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:54,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:54,332 INFO L82 PathProgramCache]: Analyzing trace with hash 893310253, now seen corresponding path program 3 times [2019-10-13 17:48:54,332 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:54,332 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847713295] [2019-10-13 17:48:54,332 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:54,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:54,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-13 17:48:54,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847713295] [2019-10-13 17:48:54,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741568416] [2019-10-13 17:48:54,461 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 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 [2019-10-13 17:48:54,533 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-13 17:48:54,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:54,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:48:54,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-13 17:48:54,559 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:54,559 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-13 17:48:54,560 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855518557] [2019-10-13 17:48:54,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:48:54,561 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:54,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:48:54,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:48:54,561 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand 11 states. [2019-10-13 17:48:54,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:54,766 INFO L93 Difference]: Finished difference Result 132 states and 161 transitions. [2019-10-13 17:48:54,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 17:48:54,767 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2019-10-13 17:48:54,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:54,768 INFO L225 Difference]: With dead ends: 132 [2019-10-13 17:48:54,768 INFO L226 Difference]: Without dead ends: 103 [2019-10-13 17:48:54,769 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:48:54,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-13 17:48:54,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2019-10-13 17:48:54,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-13 17:48:54,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2019-10-13 17:48:54,781 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 62 [2019-10-13 17:48:54,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:54,781 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2019-10-13 17:48:54,781 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:48:54,782 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2019-10-13 17:48:54,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-13 17:48:54,788 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:54,789 INFO L380 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:54,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:54,989 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:54,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:54,990 INFO L82 PathProgramCache]: Analyzing trace with hash -615935017, now seen corresponding path program 4 times [2019-10-13 17:48:54,990 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:54,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22298302] [2019-10-13 17:48:54,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:54,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:54,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:55,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-13 17:48:55,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22298302] [2019-10-13 17:48:55,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108386073] [2019-10-13 17:48:55,149 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 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 [2019-10-13 17:48:55,211 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:48:55,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:55,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:48:55,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-13 17:48:55,238 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:55,238 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 17:48:55,239 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414536874] [2019-10-13 17:48:55,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:48:55,240 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:55,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:48:55,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:48:55,240 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand 12 states. [2019-10-13 17:48:55,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:55,423 INFO L93 Difference]: Finished difference Result 146 states and 178 transitions. [2019-10-13 17:48:55,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:48:55,424 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2019-10-13 17:48:55,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:55,425 INFO L225 Difference]: With dead ends: 146 [2019-10-13 17:48:55,425 INFO L226 Difference]: Without dead ends: 114 [2019-10-13 17:48:55,426 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:48:55,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-10-13 17:48:55,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2019-10-13 17:48:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-13 17:48:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 132 transitions. [2019-10-13 17:48:55,435 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 132 transitions. Word has length 70 [2019-10-13 17:48:55,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:55,436 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 132 transitions. [2019-10-13 17:48:55,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:48:55,436 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 132 transitions. [2019-10-13 17:48:55,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 17:48:55,437 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:55,437 INFO L380 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:55,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:55,643 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:55,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:55,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1889092589, now seen corresponding path program 5 times [2019-10-13 17:48:55,644 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:55,644 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675752439] [2019-10-13 17:48:55,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:55,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:55,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-10-13 17:48:55,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675752439] [2019-10-13 17:48:55,774 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629270107] [2019-10-13 17:48:55,774 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:55,855 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-10-13 17:48:55,856 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:55,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:48:55,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-10-13 17:48:55,887 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:55,887 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 17:48:55,887 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780143019] [2019-10-13 17:48:55,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:48:55,888 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:55,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:48:55,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:48:55,893 INFO L87 Difference]: Start difference. First operand 106 states and 132 transitions. Second operand 13 states. [2019-10-13 17:48:56,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:56,100 INFO L93 Difference]: Finished difference Result 160 states and 195 transitions. [2019-10-13 17:48:56,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:48:56,100 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2019-10-13 17:48:56,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:56,102 INFO L225 Difference]: With dead ends: 160 [2019-10-13 17:48:56,102 INFO L226 Difference]: Without dead ends: 125 [2019-10-13 17:48:56,103 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:48:56,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-13 17:48:56,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 117. [2019-10-13 17:48:56,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-13 17:48:56,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 146 transitions. [2019-10-13 17:48:56,111 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 146 transitions. Word has length 78 [2019-10-13 17:48:56,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:56,111 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 146 transitions. [2019-10-13 17:48:56,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:48:56,111 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 146 transitions. [2019-10-13 17:48:56,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-13 17:48:56,113 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:56,113 INFO L380 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:56,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:56,322 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:56,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:56,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1861453033, now seen corresponding path program 6 times [2019-10-13 17:48:56,324 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:56,324 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748145826] [2019-10-13 17:48:56,324 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:56,325 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:56,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-10-13 17:48:56,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748145826] [2019-10-13 17:48:56,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092082388] [2019-10-13 17:48:56,515 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-13 17:48:56,638 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-10-13 17:48:56,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:56,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:48:56,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:56,662 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-10-13 17:48:56,662 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:56,662 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-13 17:48:56,662 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687338182] [2019-10-13 17:48:56,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:48:56,663 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:56,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:48:56,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:48:56,664 INFO L87 Difference]: Start difference. First operand 117 states and 146 transitions. Second operand 14 states. [2019-10-13 17:48:56,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:56,902 INFO L93 Difference]: Finished difference Result 174 states and 212 transitions. [2019-10-13 17:48:56,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:48:56,903 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 86 [2019-10-13 17:48:56,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:56,905 INFO L225 Difference]: With dead ends: 174 [2019-10-13 17:48:56,905 INFO L226 Difference]: Without dead ends: 136 [2019-10-13 17:48:56,906 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:48:56,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-10-13 17:48:56,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2019-10-13 17:48:56,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-10-13 17:48:56,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 160 transitions. [2019-10-13 17:48:56,913 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 160 transitions. Word has length 86 [2019-10-13 17:48:56,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:56,914 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 160 transitions. [2019-10-13 17:48:56,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:48:56,914 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 160 transitions. [2019-10-13 17:48:56,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-13 17:48:56,915 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:56,916 INFO L380 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:57,119 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:57,120 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:57,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:57,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1223892307, now seen corresponding path program 7 times [2019-10-13 17:48:57,121 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:57,121 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957349487] [2019-10-13 17:48:57,121 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:57,121 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:57,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2019-10-13 17:48:57,256 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957349487] [2019-10-13 17:48:57,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554440108] [2019-10-13 17:48:57,257 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-13 17:48:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:57,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:48:57,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-13 17:48:57,349 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:57,349 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-13 17:48:57,349 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128630441] [2019-10-13 17:48:57,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 17:48:57,350 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:57,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 17:48:57,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:48:57,351 INFO L87 Difference]: Start difference. First operand 128 states and 160 transitions. Second operand 15 states. [2019-10-13 17:48:57,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:57,661 INFO L93 Difference]: Finished difference Result 188 states and 229 transitions. [2019-10-13 17:48:57,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:48:57,662 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 94 [2019-10-13 17:48:57,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:57,664 INFO L225 Difference]: With dead ends: 188 [2019-10-13 17:48:57,664 INFO L226 Difference]: Without dead ends: 147 [2019-10-13 17:48:57,664 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:48:57,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-10-13 17:48:57,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 139. [2019-10-13 17:48:57,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-10-13 17:48:57,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 174 transitions. [2019-10-13 17:48:57,671 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 174 transitions. Word has length 94 [2019-10-13 17:48:57,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:57,672 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 174 transitions. [2019-10-13 17:48:57,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 17:48:57,672 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 174 transitions. [2019-10-13 17:48:57,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-13 17:48:57,675 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:57,676 INFO L380 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:57,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:57,889 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:57,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:57,889 INFO L82 PathProgramCache]: Analyzing trace with hash -141807017, now seen corresponding path program 8 times [2019-10-13 17:48:57,890 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:57,890 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661586080] [2019-10-13 17:48:57,890 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:57,890 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:57,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2019-10-13 17:48:58,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661586080] [2019-10-13 17:48:58,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811587120] [2019-10-13 17:48:58,106 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 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 [2019-10-13 17:48:58,165 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:48:58,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:58,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 17:48:58,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:48:58,190 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:58,190 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-13 17:48:58,190 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513836189] [2019-10-13 17:48:58,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 17:48:58,191 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:58,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 17:48:58,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:48:58,192 INFO L87 Difference]: Start difference. First operand 139 states and 174 transitions. Second operand 16 states. [2019-10-13 17:48:58,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:58,474 INFO L93 Difference]: Finished difference Result 202 states and 246 transitions. [2019-10-13 17:48:58,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:48:58,475 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 102 [2019-10-13 17:48:58,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:58,477 INFO L225 Difference]: With dead ends: 202 [2019-10-13 17:48:58,477 INFO L226 Difference]: Without dead ends: 158 [2019-10-13 17:48:58,478 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:48:58,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-10-13 17:48:58,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2019-10-13 17:48:58,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-10-13 17:48:58,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 188 transitions. [2019-10-13 17:48:58,485 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 188 transitions. Word has length 102 [2019-10-13 17:48:58,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:58,486 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 188 transitions. [2019-10-13 17:48:58,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 17:48:58,486 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 188 transitions. [2019-10-13 17:48:58,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-13 17:48:58,487 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:58,487 INFO L380 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:58,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:58,691 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:58,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:58,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1718989165, now seen corresponding path program 9 times [2019-10-13 17:48:58,692 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:58,693 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7067592] [2019-10-13 17:48:58,693 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:58,693 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:58,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-10-13 17:48:58,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7067592] [2019-10-13 17:48:58,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143494594] [2019-10-13 17:48:58,876 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 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 [2019-10-13 17:48:59,019 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2019-10-13 17:48:59,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:59,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-13 17:48:59,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-13 17:48:59,041 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:59,041 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2019-10-13 17:48:59,041 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540122011] [2019-10-13 17:48:59,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 17:48:59,042 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:59,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 17:48:59,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:48:59,042 INFO L87 Difference]: Start difference. First operand 150 states and 188 transitions. Second operand 17 states. [2019-10-13 17:48:59,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:59,332 INFO L93 Difference]: Finished difference Result 216 states and 263 transitions. [2019-10-13 17:48:59,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 17:48:59,333 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 110 [2019-10-13 17:48:59,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:59,334 INFO L225 Difference]: With dead ends: 216 [2019-10-13 17:48:59,334 INFO L226 Difference]: Without dead ends: 169 [2019-10-13 17:48:59,335 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:48:59,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-10-13 17:48:59,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 161. [2019-10-13 17:48:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-10-13 17:48:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 202 transitions. [2019-10-13 17:48:59,341 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 202 transitions. Word has length 110 [2019-10-13 17:48:59,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:59,342 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 202 transitions. [2019-10-13 17:48:59,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 17:48:59,342 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 202 transitions. [2019-10-13 17:48:59,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 17:48:59,343 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:59,343 INFO L380 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:59,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:59,548 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:59,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:59,549 INFO L82 PathProgramCache]: Analyzing trace with hash -882067049, now seen corresponding path program 10 times [2019-10-13 17:48:59,549 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:59,550 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793655855] [2019-10-13 17:48:59,550 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:59,550 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:59,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2019-10-13 17:48:59,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793655855] [2019-10-13 17:48:59,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142504039] [2019-10-13 17:48:59,718 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 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 [2019-10-13 17:48:59,782 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:48:59,782 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:59,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:48:59,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-10-13 17:48:59,837 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:59,837 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-13 17:48:59,837 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714715470] [2019-10-13 17:48:59,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:48:59,838 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:59,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:48:59,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:48:59,839 INFO L87 Difference]: Start difference. First operand 161 states and 202 transitions. Second operand 18 states. [2019-10-13 17:49:00,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:00,131 INFO L93 Difference]: Finished difference Result 230 states and 280 transitions. [2019-10-13 17:49:00,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:49:00,132 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 118 [2019-10-13 17:49:00,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:00,134 INFO L225 Difference]: With dead ends: 230 [2019-10-13 17:49:00,134 INFO L226 Difference]: Without dead ends: 180 [2019-10-13 17:49:00,136 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:49:00,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-10-13 17:49:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2019-10-13 17:49:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-10-13 17:49:00,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 216 transitions. [2019-10-13 17:49:00,142 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 216 transitions. Word has length 118 [2019-10-13 17:49:00,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:00,143 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 216 transitions. [2019-10-13 17:49:00,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:49:00,143 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 216 transitions. [2019-10-13 17:49:00,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 17:49:00,144 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:00,145 INFO L380 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:00,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:00,350 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:00,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:00,350 INFO L82 PathProgramCache]: Analyzing trace with hash 128954413, now seen corresponding path program 11 times [2019-10-13 17:49:00,351 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:00,351 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398680105] [2019-10-13 17:49:00,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:00,352 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:00,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2019-10-13 17:49:00,564 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398680105] [2019-10-13 17:49:00,565 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259907762] [2019-10-13 17:49:00,565 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:00,689 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-10-13 17:49:00,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:00,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 17:49:00,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2019-10-13 17:49:00,719 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:00,719 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-13 17:49:00,720 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554896660] [2019-10-13 17:49:00,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:49:00,720 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:00,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:49:00,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:49:00,721 INFO L87 Difference]: Start difference. First operand 172 states and 216 transitions. Second operand 19 states. [2019-10-13 17:49:01,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:01,024 INFO L93 Difference]: Finished difference Result 244 states and 297 transitions. [2019-10-13 17:49:01,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:49:01,024 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 126 [2019-10-13 17:49:01,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:01,026 INFO L225 Difference]: With dead ends: 244 [2019-10-13 17:49:01,026 INFO L226 Difference]: Without dead ends: 191 [2019-10-13 17:49:01,027 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:49:01,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-10-13 17:49:01,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 183. [2019-10-13 17:49:01,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2019-10-13 17:49:01,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 230 transitions. [2019-10-13 17:49:01,034 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 230 transitions. Word has length 126 [2019-10-13 17:49:01,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:01,035 INFO L462 AbstractCegarLoop]: Abstraction has 183 states and 230 transitions. [2019-10-13 17:49:01,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:49:01,035 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 230 transitions. [2019-10-13 17:49:01,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 17:49:01,036 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:01,037 INFO L380 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:01,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:01,242 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:01,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1101917993, now seen corresponding path program 12 times [2019-10-13 17:49:01,243 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:01,244 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973932328] [2019-10-13 17:49:01,244 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:01,244 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:01,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2019-10-13 17:49:01,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973932328] [2019-10-13 17:49:01,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404405554] [2019-10-13 17:49:01,467 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:01,739 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-10-13 17:49:01,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:01,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 17:49:01,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2019-10-13 17:49:01,798 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:01,798 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-10-13 17:49:01,798 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776001711] [2019-10-13 17:49:01,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 17:49:01,800 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:01,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 17:49:01,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:49:01,802 INFO L87 Difference]: Start difference. First operand 183 states and 230 transitions. Second operand 20 states. [2019-10-13 17:49:02,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:02,185 INFO L93 Difference]: Finished difference Result 258 states and 314 transitions. [2019-10-13 17:49:02,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 17:49:02,186 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 134 [2019-10-13 17:49:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:02,188 INFO L225 Difference]: With dead ends: 258 [2019-10-13 17:49:02,188 INFO L226 Difference]: Without dead ends: 202 [2019-10-13 17:49:02,189 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:49:02,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-10-13 17:49:02,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2019-10-13 17:49:02,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-10-13 17:49:02,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 244 transitions. [2019-10-13 17:49:02,196 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 244 transitions. Word has length 134 [2019-10-13 17:49:02,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:02,196 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 244 transitions. [2019-10-13 17:49:02,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 17:49:02,196 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 244 transitions. [2019-10-13 17:49:02,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-13 17:49:02,197 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:02,198 INFO L380 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:02,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:02,407 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:02,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:02,408 INFO L82 PathProgramCache]: Analyzing trace with hash 244768493, now seen corresponding path program 13 times [2019-10-13 17:49:02,408 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:02,408 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648896146] [2019-10-13 17:49:02,409 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:02,409 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:02,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2019-10-13 17:49:02,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648896146] [2019-10-13 17:49:02,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414076394] [2019-10-13 17:49:02,629 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:02,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:49:02,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-10-13 17:49:02,737 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:02,738 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-13 17:49:02,738 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907729645] [2019-10-13 17:49:02,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:49:02,739 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:02,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:49:02,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:49:02,739 INFO L87 Difference]: Start difference. First operand 194 states and 244 transitions. Second operand 21 states. [2019-10-13 17:49:03,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:03,057 INFO L93 Difference]: Finished difference Result 272 states and 331 transitions. [2019-10-13 17:49:03,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:49:03,057 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 142 [2019-10-13 17:49:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:03,059 INFO L225 Difference]: With dead ends: 272 [2019-10-13 17:49:03,059 INFO L226 Difference]: Without dead ends: 213 [2019-10-13 17:49:03,059 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:49:03,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-10-13 17:49:03,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2019-10-13 17:49:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-10-13 17:49:03,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 258 transitions. [2019-10-13 17:49:03,066 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 258 transitions. Word has length 142 [2019-10-13 17:49:03,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:03,067 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 258 transitions. [2019-10-13 17:49:03,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:49:03,067 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 258 transitions. [2019-10-13 17:49:03,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 17:49:03,068 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:03,068 INFO L380 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:03,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:03,272 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:03,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:03,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1226819561, now seen corresponding path program 14 times [2019-10-13 17:49:03,273 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:03,273 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308839355] [2019-10-13 17:49:03,273 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:03,273 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:03,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2019-10-13 17:49:03,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308839355] [2019-10-13 17:49:03,514 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115213489] [2019-10-13 17:49:03,514 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:03,600 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:49:03,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:03,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 17:49:03,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-10-13 17:49:03,645 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:03,646 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-10-13 17:49:03,646 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939072727] [2019-10-13 17:49:03,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 17:49:03,646 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:03,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 17:49:03,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:49:03,647 INFO L87 Difference]: Start difference. First operand 205 states and 258 transitions. Second operand 22 states. [2019-10-13 17:49:04,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:04,009 INFO L93 Difference]: Finished difference Result 286 states and 348 transitions. [2019-10-13 17:49:04,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:49:04,010 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 150 [2019-10-13 17:49:04,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:04,012 INFO L225 Difference]: With dead ends: 286 [2019-10-13 17:49:04,012 INFO L226 Difference]: Without dead ends: 224 [2019-10-13 17:49:04,013 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:49:04,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-10-13 17:49:04,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 216. [2019-10-13 17:49:04,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-10-13 17:49:04,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 272 transitions. [2019-10-13 17:49:04,021 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 272 transitions. Word has length 150 [2019-10-13 17:49:04,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:04,021 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 272 transitions. [2019-10-13 17:49:04,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 17:49:04,021 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 272 transitions. [2019-10-13 17:49:04,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-13 17:49:04,022 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:04,022 INFO L380 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:04,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:04,227 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:04,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:04,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1710801491, now seen corresponding path program 15 times [2019-10-13 17:49:04,227 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:04,228 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329767970] [2019-10-13 17:49:04,228 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:04,228 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:04,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:04,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2019-10-13 17:49:04,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329767970] [2019-10-13 17:49:04,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842226763] [2019-10-13 17:49:04,498 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:05,174 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-10-13 17:49:05,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:05,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-13 17:49:05,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:05,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2019-10-13 17:49:05,222 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:05,222 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2019-10-13 17:49:05,222 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094163083] [2019-10-13 17:49:05,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 17:49:05,223 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:05,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 17:49:05,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:49:05,223 INFO L87 Difference]: Start difference. First operand 216 states and 272 transitions. Second operand 23 states. [2019-10-13 17:49:05,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:05,585 INFO L93 Difference]: Finished difference Result 300 states and 365 transitions. [2019-10-13 17:49:05,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 17:49:05,585 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 158 [2019-10-13 17:49:05,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:05,587 INFO L225 Difference]: With dead ends: 300 [2019-10-13 17:49:05,587 INFO L226 Difference]: Without dead ends: 235 [2019-10-13 17:49:05,587 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:49:05,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-10-13 17:49:05,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 227. [2019-10-13 17:49:05,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-10-13 17:49:05,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 286 transitions. [2019-10-13 17:49:05,594 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 286 transitions. Word has length 158 [2019-10-13 17:49:05,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:05,595 INFO L462 AbstractCegarLoop]: Abstraction has 227 states and 286 transitions. [2019-10-13 17:49:05,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-13 17:49:05,595 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 286 transitions. [2019-10-13 17:49:05,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 17:49:05,596 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:05,597 INFO L380 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:05,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:05,798 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:05,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:05,798 INFO L82 PathProgramCache]: Analyzing trace with hash 280702807, now seen corresponding path program 16 times [2019-10-13 17:49:05,799 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:05,799 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854331281] [2019-10-13 17:49:05,799 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:05,800 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:05,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2019-10-13 17:49:06,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854331281] [2019-10-13 17:49:06,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85659253] [2019-10-13 17:49:06,139 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:06,264 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:49:06,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:06,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 17:49:06,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-10-13 17:49:06,322 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:06,323 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-13 17:49:06,323 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105810530] [2019-10-13 17:49:06,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 17:49:06,324 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:06,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 17:49:06,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:49:06,327 INFO L87 Difference]: Start difference. First operand 227 states and 286 transitions. Second operand 24 states. [2019-10-13 17:49:06,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:06,766 INFO L93 Difference]: Finished difference Result 314 states and 382 transitions. [2019-10-13 17:49:06,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 17:49:06,767 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 166 [2019-10-13 17:49:06,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:06,769 INFO L225 Difference]: With dead ends: 314 [2019-10-13 17:49:06,769 INFO L226 Difference]: Without dead ends: 246 [2019-10-13 17:49:06,770 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:49:06,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-10-13 17:49:06,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 238. [2019-10-13 17:49:06,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2019-10-13 17:49:06,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 300 transitions. [2019-10-13 17:49:06,778 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 300 transitions. Word has length 166 [2019-10-13 17:49:06,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:06,778 INFO L462 AbstractCegarLoop]: Abstraction has 238 states and 300 transitions. [2019-10-13 17:49:06,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 17:49:06,779 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 300 transitions. [2019-10-13 17:49:06,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-13 17:49:06,780 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:06,780 INFO L380 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:06,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:06,985 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:06,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:06,985 INFO L82 PathProgramCache]: Analyzing trace with hash 870108269, now seen corresponding path program 17 times [2019-10-13 17:49:06,985 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:06,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096696912] [2019-10-13 17:49:06,986 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:06,986 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:06,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2019-10-13 17:49:07,271 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096696912] [2019-10-13 17:49:07,271 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213415234] [2019-10-13 17:49:07,271 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:07,517 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-10-13 17:49:07,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:07,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 17:49:07,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2019-10-13 17:49:07,551 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:07,551 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-13 17:49:07,551 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785146225] [2019-10-13 17:49:07,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 17:49:07,552 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:07,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 17:49:07,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:49:07,552 INFO L87 Difference]: Start difference. First operand 238 states and 300 transitions. Second operand 25 states. [2019-10-13 17:49:07,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:07,932 INFO L93 Difference]: Finished difference Result 328 states and 399 transitions. [2019-10-13 17:49:07,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 17:49:07,935 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 174 [2019-10-13 17:49:07,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:07,936 INFO L225 Difference]: With dead ends: 328 [2019-10-13 17:49:07,936 INFO L226 Difference]: Without dead ends: 257 [2019-10-13 17:49:07,937 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:49:07,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2019-10-13 17:49:07,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 249. [2019-10-13 17:49:07,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2019-10-13 17:49:07,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 314 transitions. [2019-10-13 17:49:07,946 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 314 transitions. Word has length 174 [2019-10-13 17:49:07,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:07,946 INFO L462 AbstractCegarLoop]: Abstraction has 249 states and 314 transitions. [2019-10-13 17:49:07,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 17:49:07,946 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 314 transitions. [2019-10-13 17:49:07,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-13 17:49:07,948 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:07,948 INFO L380 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:08,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:08,154 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:08,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:08,154 INFO L82 PathProgramCache]: Analyzing trace with hash -595134825, now seen corresponding path program 18 times [2019-10-13 17:49:08,154 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:08,154 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815937297] [2019-10-13 17:49:08,154 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:08,155 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:08,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2019-10-13 17:49:08,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815937297] [2019-10-13 17:49:08,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080447047] [2019-10-13 17:49:08,477 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:10,403 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-10-13 17:49:10,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:10,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-13 17:49:10,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:10,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-10-13 17:49:10,461 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:10,461 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2019-10-13 17:49:10,461 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398512768] [2019-10-13 17:49:10,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-13 17:49:10,462 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:10,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-13 17:49:10,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:49:10,463 INFO L87 Difference]: Start difference. First operand 249 states and 314 transitions. Second operand 26 states. [2019-10-13 17:49:10,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:10,865 INFO L93 Difference]: Finished difference Result 342 states and 416 transitions. [2019-10-13 17:49:10,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-13 17:49:10,866 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 182 [2019-10-13 17:49:10,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:10,868 INFO L225 Difference]: With dead ends: 342 [2019-10-13 17:49:10,868 INFO L226 Difference]: Without dead ends: 268 [2019-10-13 17:49:10,868 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:49:10,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-10-13 17:49:10,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 260. [2019-10-13 17:49:10,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2019-10-13 17:49:10,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 328 transitions. [2019-10-13 17:49:10,875 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 328 transitions. Word has length 182 [2019-10-13 17:49:10,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:10,876 INFO L462 AbstractCegarLoop]: Abstraction has 260 states and 328 transitions. [2019-10-13 17:49:10,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-13 17:49:10,876 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 328 transitions. [2019-10-13 17:49:10,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-10-13 17:49:10,877 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:10,877 INFO L380 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:11,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:11,078 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:11,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:11,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1863087315, now seen corresponding path program 19 times [2019-10-13 17:49:11,078 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:11,079 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848123069] [2019-10-13 17:49:11,079 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:11,079 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:11,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2019-10-13 17:49:11,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848123069] [2019-10-13 17:49:11,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116251158] [2019-10-13 17:49:11,419 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:11,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-13 17:49:11,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-10-13 17:49:11,573 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:11,574 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-13 17:49:11,574 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670839642] [2019-10-13 17:49:11,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-13 17:49:11,576 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:11,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-13 17:49:11,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:49:11,576 INFO L87 Difference]: Start difference. First operand 260 states and 328 transitions. Second operand 27 states. [2019-10-13 17:49:12,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:12,141 INFO L93 Difference]: Finished difference Result 356 states and 433 transitions. [2019-10-13 17:49:12,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-13 17:49:12,141 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 190 [2019-10-13 17:49:12,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:12,143 INFO L225 Difference]: With dead ends: 356 [2019-10-13 17:49:12,144 INFO L226 Difference]: Without dead ends: 279 [2019-10-13 17:49:12,145 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:49:12,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2019-10-13 17:49:12,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 271. [2019-10-13 17:49:12,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2019-10-13 17:49:12,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 342 transitions. [2019-10-13 17:49:12,156 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 342 transitions. Word has length 190 [2019-10-13 17:49:12,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:12,156 INFO L462 AbstractCegarLoop]: Abstraction has 271 states and 342 transitions. [2019-10-13 17:49:12,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-13 17:49:12,157 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 342 transitions. [2019-10-13 17:49:12,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-10-13 17:49:12,159 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:12,159 INFO L380 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:12,363 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:12,364 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:12,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:12,364 INFO L82 PathProgramCache]: Analyzing trace with hash 535268823, now seen corresponding path program 20 times [2019-10-13 17:49:12,365 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:12,365 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453281819] [2019-10-13 17:49:12,365 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:12,365 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:12,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2019-10-13 17:49:12,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453281819] [2019-10-13 17:49:12,878 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956777771] [2019-10-13 17:49:12,878 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:12,984 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:49:12,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:12,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-13 17:49:12,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-10-13 17:49:13,070 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:13,070 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-10-13 17:49:13,070 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422971062] [2019-10-13 17:49:13,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 17:49:13,071 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:13,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 17:49:13,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:49:13,072 INFO L87 Difference]: Start difference. First operand 271 states and 342 transitions. Second operand 28 states. [2019-10-13 17:49:13,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:13,594 INFO L93 Difference]: Finished difference Result 370 states and 450 transitions. [2019-10-13 17:49:13,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 17:49:13,595 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 198 [2019-10-13 17:49:13,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:13,597 INFO L225 Difference]: With dead ends: 370 [2019-10-13 17:49:13,597 INFO L226 Difference]: Without dead ends: 290 [2019-10-13 17:49:13,598 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:49:13,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2019-10-13 17:49:13,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 282. [2019-10-13 17:49:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2019-10-13 17:49:13,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 356 transitions. [2019-10-13 17:49:13,605 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 356 transitions. Word has length 198 [2019-10-13 17:49:13,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:13,606 INFO L462 AbstractCegarLoop]: Abstraction has 282 states and 356 transitions. [2019-10-13 17:49:13,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 17:49:13,606 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 356 transitions. [2019-10-13 17:49:13,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-10-13 17:49:13,607 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:13,607 INFO L380 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:13,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:13,811 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:13,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:13,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1361541613, now seen corresponding path program 21 times [2019-10-13 17:49:13,812 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:13,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808224337] [2019-10-13 17:49:13,813 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:13,813 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:13,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2019-10-13 17:49:14,247 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808224337] [2019-10-13 17:49:14,247 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772535404] [2019-10-13 17:49:14,248 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:15,971 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2019-10-13 17:49:15,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:15,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 17:49:15,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2019-10-13 17:49:16,018 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:16,018 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2019-10-13 17:49:16,018 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876257173] [2019-10-13 17:49:16,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-13 17:49:16,018 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:16,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-13 17:49:16,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-10-13 17:49:16,019 INFO L87 Difference]: Start difference. First operand 282 states and 356 transitions. Second operand 29 states. [2019-10-13 17:49:16,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:16,597 INFO L93 Difference]: Finished difference Result 384 states and 467 transitions. [2019-10-13 17:49:16,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-13 17:49:16,598 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 206 [2019-10-13 17:49:16,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:16,600 INFO L225 Difference]: With dead ends: 384 [2019-10-13 17:49:16,600 INFO L226 Difference]: Without dead ends: 301 [2019-10-13 17:49:16,601 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-10-13 17:49:16,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-10-13 17:49:16,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 293. [2019-10-13 17:49:16,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2019-10-13 17:49:16,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 370 transitions. [2019-10-13 17:49:16,608 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 370 transitions. Word has length 206 [2019-10-13 17:49:16,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:16,609 INFO L462 AbstractCegarLoop]: Abstraction has 293 states and 370 transitions. [2019-10-13 17:49:16,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-13 17:49:16,609 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 370 transitions. [2019-10-13 17:49:16,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-10-13 17:49:16,610 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:16,611 INFO L380 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:16,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:16,812 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:16,812 INFO L82 PathProgramCache]: Analyzing trace with hash 360772887, now seen corresponding path program 22 times [2019-10-13 17:49:16,813 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:16,813 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585935680] [2019-10-13 17:49:16,813 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:16,813 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:16,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2019-10-13 17:49:17,306 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585935680] [2019-10-13 17:49:17,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230023078] [2019-10-13 17:49:17,307 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:17,422 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:49:17,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:17,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-13 17:49:17,426 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-10-13 17:49:17,469 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:17,469 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-13 17:49:17,469 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215654956] [2019-10-13 17:49:17,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-13 17:49:17,470 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:17,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-13 17:49:17,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:49:17,470 INFO L87 Difference]: Start difference. First operand 293 states and 370 transitions. Second operand 30 states. [2019-10-13 17:49:18,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:18,017 INFO L93 Difference]: Finished difference Result 398 states and 484 transitions. [2019-10-13 17:49:18,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-13 17:49:18,017 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 214 [2019-10-13 17:49:18,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:18,020 INFO L225 Difference]: With dead ends: 398 [2019-10-13 17:49:18,020 INFO L226 Difference]: Without dead ends: 312 [2019-10-13 17:49:18,021 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:49:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2019-10-13 17:49:18,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 304. [2019-10-13 17:49:18,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2019-10-13 17:49:18,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 384 transitions. [2019-10-13 17:49:18,029 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 384 transitions. Word has length 214 [2019-10-13 17:49:18,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:18,029 INFO L462 AbstractCegarLoop]: Abstraction has 304 states and 384 transitions. [2019-10-13 17:49:18,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-13 17:49:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 384 transitions. [2019-10-13 17:49:18,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-10-13 17:49:18,031 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:18,031 INFO L380 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:18,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:18,235 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:18,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:18,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1084974931, now seen corresponding path program 23 times [2019-10-13 17:49:18,236 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:18,236 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829488281] [2019-10-13 17:49:18,237 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:18,237 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:18,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1651 trivial. 0 not checked. [2019-10-13 17:49:18,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829488281] [2019-10-13 17:49:18,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675392523] [2019-10-13 17:49:18,713 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:19,474 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2019-10-13 17:49:19,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:19,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-13 17:49:19,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2019-10-13 17:49:19,526 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:19,526 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-13 17:49:19,526 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366697554] [2019-10-13 17:49:19,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-13 17:49:19,527 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:19,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-13 17:49:19,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:49:19,528 INFO L87 Difference]: Start difference. First operand 304 states and 384 transitions. Second operand 31 states. [2019-10-13 17:49:20,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:20,169 INFO L93 Difference]: Finished difference Result 412 states and 501 transitions. [2019-10-13 17:49:20,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 17:49:20,169 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 222 [2019-10-13 17:49:20,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:20,172 INFO L225 Difference]: With dead ends: 412 [2019-10-13 17:49:20,172 INFO L226 Difference]: Without dead ends: 323 [2019-10-13 17:49:20,173 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:49:20,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2019-10-13 17:49:20,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 315. [2019-10-13 17:49:20,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2019-10-13 17:49:20,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 398 transitions. [2019-10-13 17:49:20,185 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 398 transitions. Word has length 222 [2019-10-13 17:49:20,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:20,185 INFO L462 AbstractCegarLoop]: Abstraction has 315 states and 398 transitions. [2019-10-13 17:49:20,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-13 17:49:20,186 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 398 transitions. [2019-10-13 17:49:20,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-13 17:49:20,188 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:20,189 INFO L380 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:20,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:20,395 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:20,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:20,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1828138071, now seen corresponding path program 24 times [2019-10-13 17:49:20,396 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:20,396 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480886936] [2019-10-13 17:49:20,397 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:20,397 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:20,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:21,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1782 trivial. 0 not checked. [2019-10-13 17:49:21,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480886936] [2019-10-13 17:49:21,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434358360] [2019-10-13 17:49:21,022 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:25,619 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2019-10-13 17:49:25,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:25,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-13 17:49:25,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1782 trivial. 0 not checked. [2019-10-13 17:49:25,695 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:25,695 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2019-10-13 17:49:25,695 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377417051] [2019-10-13 17:49:25,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-13 17:49:25,696 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:25,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-13 17:49:25,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-13 17:49:25,697 INFO L87 Difference]: Start difference. First operand 315 states and 398 transitions. Second operand 32 states. [2019-10-13 17:49:26,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:26,241 INFO L93 Difference]: Finished difference Result 426 states and 518 transitions. [2019-10-13 17:49:26,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-13 17:49:26,241 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 230 [2019-10-13 17:49:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:26,244 INFO L225 Difference]: With dead ends: 426 [2019-10-13 17:49:26,244 INFO L226 Difference]: Without dead ends: 334 [2019-10-13 17:49:26,245 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-13 17:49:26,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2019-10-13 17:49:26,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 326. [2019-10-13 17:49:26,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2019-10-13 17:49:26,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 412 transitions. [2019-10-13 17:49:26,256 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 412 transitions. Word has length 230 [2019-10-13 17:49:26,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:26,257 INFO L462 AbstractCegarLoop]: Abstraction has 326 states and 412 transitions. [2019-10-13 17:49:26,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-13 17:49:26,257 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 412 transitions. [2019-10-13 17:49:26,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-10-13 17:49:26,268 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:26,268 INFO L380 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:26,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:26,477 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:26,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:26,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1856575635, now seen corresponding path program 25 times [2019-10-13 17:49:26,478 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:26,478 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922692870] [2019-10-13 17:49:26,479 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:26,479 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:26,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1918 trivial. 0 not checked. [2019-10-13 17:49:26,965 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922692870] [2019-10-13 17:49:26,965 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133401579] [2019-10-13 17:49:26,965 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:27,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-13 17:49:27,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2019-10-13 17:49:27,146 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:27,147 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-10-13 17:49:27,147 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032276625] [2019-10-13 17:49:27,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-13 17:49:27,148 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:27,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-13 17:49:27,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 17:49:27,149 INFO L87 Difference]: Start difference. First operand 326 states and 412 transitions. Second operand 33 states. [2019-10-13 17:49:27,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:27,755 INFO L93 Difference]: Finished difference Result 440 states and 535 transitions. [2019-10-13 17:49:27,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-13 17:49:27,756 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 238 [2019-10-13 17:49:27,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:27,758 INFO L225 Difference]: With dead ends: 440 [2019-10-13 17:49:27,758 INFO L226 Difference]: Without dead ends: 345 [2019-10-13 17:49:27,760 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 17:49:27,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2019-10-13 17:49:27,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 337. [2019-10-13 17:49:27,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2019-10-13 17:49:27,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 426 transitions. [2019-10-13 17:49:27,768 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 426 transitions. Word has length 238 [2019-10-13 17:49:27,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:27,768 INFO L462 AbstractCegarLoop]: Abstraction has 337 states and 426 transitions. [2019-10-13 17:49:27,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-13 17:49:27,769 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 426 transitions. [2019-10-13 17:49:27,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-10-13 17:49:27,770 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:27,770 INFO L380 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:27,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:27,975 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:27,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:27,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1964100713, now seen corresponding path program 26 times [2019-10-13 17:49:27,975 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:27,975 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041435256] [2019-10-13 17:49:27,975 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:27,975 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:27,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2019-10-13 17:49:28,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041435256] [2019-10-13 17:49:28,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469498633] [2019-10-13 17:49:28,442 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:28,567 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:49:28,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:28,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-13 17:49:28,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2019-10-13 17:49:28,627 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:28,627 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2019-10-13 17:49:28,627 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514318446] [2019-10-13 17:49:28,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-13 17:49:28,628 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:28,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-13 17:49:28,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 17:49:28,629 INFO L87 Difference]: Start difference. First operand 337 states and 426 transitions. Second operand 34 states. [2019-10-13 17:49:29,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:29,222 INFO L93 Difference]: Finished difference Result 454 states and 552 transitions. [2019-10-13 17:49:29,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-13 17:49:29,222 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 246 [2019-10-13 17:49:29,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:29,225 INFO L225 Difference]: With dead ends: 454 [2019-10-13 17:49:29,225 INFO L226 Difference]: Without dead ends: 356 [2019-10-13 17:49:29,226 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 17:49:29,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2019-10-13 17:49:29,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 348. [2019-10-13 17:49:29,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2019-10-13 17:49:29,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 440 transitions. [2019-10-13 17:49:29,233 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 440 transitions. Word has length 246 [2019-10-13 17:49:29,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:29,233 INFO L462 AbstractCegarLoop]: Abstraction has 348 states and 440 transitions. [2019-10-13 17:49:29,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-13 17:49:29,234 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 440 transitions. [2019-10-13 17:49:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2019-10-13 17:49:29,235 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:29,235 INFO L380 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:29,444 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:29,444 INFO L410 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:29,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:29,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1475713491, now seen corresponding path program 27 times [2019-10-13 17:49:29,444 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:29,444 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379989743] [2019-10-13 17:49:29,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:29,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:29,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2019-10-13 17:49:30,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379989743] [2019-10-13 17:49:30,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853100383] [2019-10-13 17:49:30,179 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true