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/reducercommutativity/sep60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:43:10,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:43:10,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:43:10,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:43:10,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:43:10,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:43:10,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:43:10,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:43:10,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:43:10,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:43:10,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:43:10,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:43:10,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:43:10,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:43:10,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:43:10,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:43:10,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:43:10,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:43:10,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:43:10,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:43:10,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:43:10,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:43:10,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:43:10,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:43:10,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:43:10,381 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:43:10,383 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:43:10,384 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:43:10,385 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:43:10,387 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:43:10,387 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:43:10,388 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:43:10,388 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:43:10,388 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:43:10,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:43:10,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:43:10,391 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:43:10,426 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:43:10,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:43:10,428 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:43:10,430 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:43:10,431 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:43:10,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:43:10,431 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:43:10,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:43:10,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:43:10,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:43:10,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:43:10,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:43:10,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:43:10,433 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:43:10,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:43:10,434 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:43:10,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:43:10,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:43:10,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:43:10,435 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:43:10,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:43:10,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:43:10,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:43:10,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:43:10,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:43:10,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:43:10,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:43:10,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:43:10,437 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:43:10,777 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:43:10,799 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:43:10,803 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:43:10,804 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:43:10,805 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:43:10,806 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep60-2.i [2019-10-14 23:43:10,883 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/049206c9e/1149f1b469dd4bc1b74a10e3c05382ae/FLAGb42b5fec1 [2019-10-14 23:43:11,372 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:43:11,372 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep60-2.i [2019-10-14 23:43:11,379 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/049206c9e/1149f1b469dd4bc1b74a10e3c05382ae/FLAGb42b5fec1 [2019-10-14 23:43:11,716 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/049206c9e/1149f1b469dd4bc1b74a10e3c05382ae [2019-10-14 23:43:11,727 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:43:11,729 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:43:11,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:43:11,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:43:11,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:43:11,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:43:11" (1/1) ... [2019-10-14 23:43:11,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6509102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:11, skipping insertion in model container [2019-10-14 23:43:11,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:43:11" (1/1) ... [2019-10-14 23:43:11,747 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:43:11,771 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:43:12,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:43:12,055 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:43:12,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:43:12,198 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:43:12,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:12 WrapperNode [2019-10-14 23:43:12,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:43:12,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:43:12,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:43:12,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:43:12,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:12" (1/1) ... [2019-10-14 23:43:12,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:12" (1/1) ... [2019-10-14 23:43:12,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:12" (1/1) ... [2019-10-14 23:43:12,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:12" (1/1) ... [2019-10-14 23:43:12,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:12" (1/1) ... [2019-10-14 23:43:12,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:12" (1/1) ... [2019-10-14 23:43:12,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:12" (1/1) ... [2019-10-14 23:43:12,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:43:12,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:43:12,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:43:12,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:43:12,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:43:12,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:43:12,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:43:12,353 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-10-14 23:43:12,353 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:43:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:43:12,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:43:12,354 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-10-14 23:43:12,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:43:12,354 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:43:12,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:43:12,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:43:12,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:43:12,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:43:12,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:43:12,713 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:43:12,714 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 23:43:12,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:43:12 BoogieIcfgContainer [2019-10-14 23:43:12,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:43:12,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:43:12,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:43:12,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:43:12,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:43:11" (1/3) ... [2019-10-14 23:43:12,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@385db4d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:43:12, skipping insertion in model container [2019-10-14 23:43:12,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:12" (2/3) ... [2019-10-14 23:43:12,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@385db4d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:43:12, skipping insertion in model container [2019-10-14 23:43:12,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:43:12" (3/3) ... [2019-10-14 23:43:12,723 INFO L109 eAbstractionObserver]: Analyzing ICFG sep60-2.i [2019-10-14 23:43:12,733 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:43:12,740 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:43:12,752 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:43:12,777 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:43:12,777 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:43:12,778 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:43:12,778 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:43:12,778 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:43:12,778 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:43:12,778 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:43:12,779 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:43:12,796 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-14 23:43:12,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:43:12,802 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:12,803 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:12,805 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:12,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:12,811 INFO L82 PathProgramCache]: Analyzing trace with hash 794343521, now seen corresponding path program 1 times [2019-10-14 23:43:12,818 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:12,818 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755598513] [2019-10-14 23:43:12,819 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:12,819 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:12,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:43:13,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755598513] [2019-10-14 23:43:13,045 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:43:13,046 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:43:13,046 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969460337] [2019-10-14 23:43:13,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:43:13,050 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:13,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:43:13,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:43:13,066 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-10-14 23:43:13,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:13,175 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2019-10-14 23:43:13,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:43:13,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 23:43:13,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:13,186 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:43:13,187 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 23:43:13,191 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:43:13,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 23:43:13,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 23:43:13,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:43:13,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-14 23:43:13,236 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2019-10-14 23:43:13,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:13,237 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-14 23:43:13,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:43:13,237 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-14 23:43:13,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:43:13,240 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:13,240 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:13,240 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:13,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:13,241 INFO L82 PathProgramCache]: Analyzing trace with hash 2140793590, now seen corresponding path program 1 times [2019-10-14 23:43:13,241 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:13,242 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313375423] [2019-10-14 23:43:13,242 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:13,242 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:13,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:43:13,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313375423] [2019-10-14 23:43:13,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416060900] [2019-10-14 23:43:13,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:43:13,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:43:13,552 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:43:13,552 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 23:43:13,553 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492125062] [2019-10-14 23:43:13,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:43:13,556 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:13,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:43:13,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:43:13,557 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-10-14 23:43:13,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:13,576 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-10-14 23:43:13,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:43:13,577 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 23:43:13,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:13,578 INFO L225 Difference]: With dead ends: 48 [2019-10-14 23:43:13,578 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 23:43:13,580 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:43:13,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 23:43:13,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-14 23:43:13,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 23:43:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-14 23:43:13,588 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2019-10-14 23:43:13,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:13,588 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-14 23:43:13,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:43:13,588 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-14 23:43:13,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:43:13,590 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:13,590 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:13,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:13,795 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:13,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:13,796 INFO L82 PathProgramCache]: Analyzing trace with hash 2099349144, now seen corresponding path program 1 times [2019-10-14 23:43:13,797 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:13,797 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83999131] [2019-10-14 23:43:13,798 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:13,798 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:13,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:43:13,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83999131] [2019-10-14 23:43:13,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669173348] [2019-10-14 23:43:13,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:13,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:43:13,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:43:14,013 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:43:14,014 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-14 23:43:14,014 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138900699] [2019-10-14 23:43:14,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:43:14,015 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:14,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:43:14,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:43:14,016 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2019-10-14 23:43:14,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:14,041 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2019-10-14 23:43:14,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:43:14,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-14 23:43:14,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:14,043 INFO L225 Difference]: With dead ends: 49 [2019-10-14 23:43:14,043 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:43:14,044 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:43:14,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:43:14,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-10-14 23:43:14,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:43:14,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-14 23:43:14,069 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 34 [2019-10-14 23:43:14,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:14,070 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-14 23:43:14,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:43:14,070 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-14 23:43:14,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 23:43:14,074 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:14,074 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:14,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:14,277 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:14,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:14,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1279819331, now seen corresponding path program 1 times [2019-10-14 23:43:14,279 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:14,279 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744106829] [2019-10-14 23:43:14,280 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:14,280 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:14,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:43:14,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744106829] [2019-10-14 23:43:14,404 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:43:14,404 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:43:14,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632497993] [2019-10-14 23:43:14,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:43:14,405 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:14,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:43:14,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:43:14,406 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 4 states. [2019-10-14 23:43:14,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:14,483 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-10-14 23:43:14,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:43:14,484 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-10-14 23:43:14,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:14,485 INFO L225 Difference]: With dead ends: 45 [2019-10-14 23:43:14,486 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:43:14,486 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:43:14,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:43:14,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-10-14 23:43:14,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:43:14,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-14 23:43:14,493 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 43 [2019-10-14 23:43:14,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:14,495 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-14 23:43:14,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:43:14,495 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-14 23:43:14,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 23:43:14,496 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:14,497 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:14,497 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:14,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:14,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1550635457, now seen corresponding path program 1 times [2019-10-14 23:43:14,498 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:14,498 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257160651] [2019-10-14 23:43:14,498 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:14,498 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:14,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:43:14,640 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257160651] [2019-10-14 23:43:14,640 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023400720] [2019-10-14 23:43:14,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:43:14,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:43:14,723 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:14,723 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 23:43:14,723 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227891442] [2019-10-14 23:43:14,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:43:14,724 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:14,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:43:14,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:43:14,725 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2019-10-14 23:43:14,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:14,814 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2019-10-14 23:43:14,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:43:14,819 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2019-10-14 23:43:14,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:14,820 INFO L225 Difference]: With dead ends: 54 [2019-10-14 23:43:14,820 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:43:14,821 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:43:14,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:43:14,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-10-14 23:43:14,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:43:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2019-10-14 23:43:14,834 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 45 [2019-10-14 23:43:14,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:14,835 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2019-10-14 23:43:14,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:43:14,835 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-10-14 23:43:14,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 23:43:14,839 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:14,839 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:15,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:15,046 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:15,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:15,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1356401117, now seen corresponding path program 2 times [2019-10-14 23:43:15,047 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:15,048 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255479950] [2019-10-14 23:43:15,048 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:15,049 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:15,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:43:15,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255479950] [2019-10-14 23:43:15,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041800546] [2019-10-14 23:43:15,187 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:15,250 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:15,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:15,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:43:15,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:43:15,279 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:15,279 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 23:43:15,279 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507952573] [2019-10-14 23:43:15,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:43:15,280 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:15,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:43:15,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:43:15,281 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 7 states. [2019-10-14 23:43:15,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:15,370 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-10-14 23:43:15,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:43:15,370 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2019-10-14 23:43:15,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:15,371 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:43:15,371 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 23:43:15,372 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:43:15,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 23:43:15,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-14 23:43:15,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 23:43:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2019-10-14 23:43:15,379 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 47 [2019-10-14 23:43:15,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:15,379 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2019-10-14 23:43:15,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:43:15,380 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2019-10-14 23:43:15,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 23:43:15,381 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:15,381 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:15,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:15,586 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:15,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:15,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1005160965, now seen corresponding path program 3 times [2019-10-14 23:43:15,587 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:15,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314906244] [2019-10-14 23:43:15,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:15,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:15,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:43:15,714 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314906244] [2019-10-14 23:43:15,715 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577629173] [2019-10-14 23:43:15,716 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:15,777 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:43:15,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:15,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:43:15,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 23:43:15,835 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:15,835 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-14 23:43:15,838 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728065263] [2019-10-14 23:43:15,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:43:15,839 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:15,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:43:15,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:43:15,840 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 9 states. [2019-10-14 23:43:16,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:16,005 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2019-10-14 23:43:16,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:43:16,006 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2019-10-14 23:43:16,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:16,007 INFO L225 Difference]: With dead ends: 63 [2019-10-14 23:43:16,007 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:43:16,007 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:43:16,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:43:16,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2019-10-14 23:43:16,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:43:16,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-10-14 23:43:16,017 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 49 [2019-10-14 23:43:16,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:16,019 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-10-14 23:43:16,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:43:16,019 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-10-14 23:43:16,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 23:43:16,021 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:16,021 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:16,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:16,226 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:16,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:16,227 INFO L82 PathProgramCache]: Analyzing trace with hash 742022364, now seen corresponding path program 4 times [2019-10-14 23:43:16,227 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:16,227 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924822503] [2019-10-14 23:43:16,228 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:16,228 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:16,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 23:43:16,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924822503] [2019-10-14 23:43:16,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442425176] [2019-10-14 23:43:16,344 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:16,418 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:16,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:16,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:43:16,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 23:43:16,450 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:16,450 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 23:43:16,450 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61371290] [2019-10-14 23:43:16,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:43:16,451 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:16,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:43:16,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:43:16,452 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 9 states. [2019-10-14 23:43:16,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:16,553 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2019-10-14 23:43:16,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:43:16,554 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2019-10-14 23:43:16,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:16,555 INFO L225 Difference]: With dead ends: 66 [2019-10-14 23:43:16,555 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:43:16,556 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:43:16,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:43:16,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 23:43:16,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:43:16,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-10-14 23:43:16,568 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 60 [2019-10-14 23:43:16,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:16,569 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-10-14 23:43:16,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:43:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-10-14 23:43:16,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-14 23:43:16,572 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:16,572 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:16,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:16,773 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:16,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:16,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1389751938, now seen corresponding path program 5 times [2019-10-14 23:43:16,774 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:16,774 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735517372] [2019-10-14 23:43:16,774 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:16,774 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:16,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 23:43:16,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735517372] [2019-10-14 23:43:16,872 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038159893] [2019-10-14 23:43:16,872 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:16,954 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-14 23:43:16,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:16,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:43:16,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 5 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-14 23:43:17,002 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:17,003 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 23:43:17,003 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722068301] [2019-10-14 23:43:17,003 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:43:17,004 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:17,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:43:17,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:17,008 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 12 states. [2019-10-14 23:43:17,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:17,209 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2019-10-14 23:43:17,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:43:17,209 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2019-10-14 23:43:17,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:17,210 INFO L225 Difference]: With dead ends: 73 [2019-10-14 23:43:17,210 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 23:43:17,211 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:43:17,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 23:43:17,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2019-10-14 23:43:17,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 23:43:17,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2019-10-14 23:43:17,221 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 62 [2019-10-14 23:43:17,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:17,222 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2019-10-14 23:43:17,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:43:17,222 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2019-10-14 23:43:17,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-14 23:43:17,225 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:17,225 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:17,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:17,430 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:17,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:17,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1972208203, now seen corresponding path program 6 times [2019-10-14 23:43:17,431 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:17,432 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175310709] [2019-10-14 23:43:17,432 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:17,432 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:17,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:17,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-10-14 23:43:17,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175310709] [2019-10-14 23:43:17,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302156464] [2019-10-14 23:43:17,569 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:17,643 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 23:43:17,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:17,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:43:17,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-10-14 23:43:17,688 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:17,689 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 12 [2019-10-14 23:43:17,689 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389797504] [2019-10-14 23:43:17,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:43:17,690 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:17,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:43:17,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:17,691 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 12 states. [2019-10-14 23:43:17,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:17,847 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2019-10-14 23:43:17,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:43:17,848 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2019-10-14 23:43:17,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:17,849 INFO L225 Difference]: With dead ends: 79 [2019-10-14 23:43:17,849 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 23:43:17,850 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:17,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 23:43:17,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2019-10-14 23:43:17,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 23:43:17,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2019-10-14 23:43:17,859 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 73 [2019-10-14 23:43:17,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:17,860 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2019-10-14 23:43:17,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:43:17,861 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2019-10-14 23:43:17,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-14 23:43:17,867 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:17,868 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:18,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:18,074 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:18,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:18,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1857138133, now seen corresponding path program 7 times [2019-10-14 23:43:18,074 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:18,074 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9657979] [2019-10-14 23:43:18,074 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:18,075 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:18,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-10-14 23:43:18,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9657979] [2019-10-14 23:43:18,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088822400] [2019-10-14 23:43:18,199 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:43:18,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-10-14 23:43:18,314 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:18,314 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 23:43:18,314 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780279732] [2019-10-14 23:43:18,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:43:18,315 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:18,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:43:18,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:18,315 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 12 states. [2019-10-14 23:43:18,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:18,442 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2019-10-14 23:43:18,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:43:18,442 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2019-10-14 23:43:18,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:18,443 INFO L225 Difference]: With dead ends: 82 [2019-10-14 23:43:18,443 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 23:43:18,444 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:43:18,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 23:43:18,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-10-14 23:43:18,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 23:43:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2019-10-14 23:43:18,450 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 77 [2019-10-14 23:43:18,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:18,450 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2019-10-14 23:43:18,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:43:18,450 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2019-10-14 23:43:18,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-14 23:43:18,451 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:18,452 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:18,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:18,653 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:18,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:18,653 INFO L82 PathProgramCache]: Analyzing trace with hash 15831411, now seen corresponding path program 8 times [2019-10-14 23:43:18,654 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:18,654 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281786276] [2019-10-14 23:43:18,654 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:18,654 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:18,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-10-14 23:43:18,793 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281786276] [2019-10-14 23:43:18,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198564120] [2019-10-14 23:43:18,794 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:18,899 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:18,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:18,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:43:18,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-10-14 23:43:18,946 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:18,946 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 23:43:18,947 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215430481] [2019-10-14 23:43:18,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:43:18,951 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:18,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:43:18,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:43:18,952 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 13 states. [2019-10-14 23:43:19,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:19,105 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2019-10-14 23:43:19,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:43:19,105 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2019-10-14 23:43:19,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:19,106 INFO L225 Difference]: With dead ends: 84 [2019-10-14 23:43:19,107 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 23:43:19,107 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:43:19,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 23:43:19,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-10-14 23:43:19,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 23:43:19,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2019-10-14 23:43:19,117 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 79 [2019-10-14 23:43:19,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:19,117 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2019-10-14 23:43:19,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:43:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2019-10-14 23:43:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 23:43:19,119 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:19,119 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:19,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:19,320 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:19,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:19,321 INFO L82 PathProgramCache]: Analyzing trace with hash 46597521, now seen corresponding path program 9 times [2019-10-14 23:43:19,321 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:19,321 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97292774] [2019-10-14 23:43:19,321 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:19,321 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:19,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-10-14 23:43:19,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97292774] [2019-10-14 23:43:19,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381954503] [2019-10-14 23:43:19,477 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:19,558 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:43:19,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:19,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:43:19,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 74 proven. 12 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-10-14 23:43:19,664 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:19,664 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2019-10-14 23:43:19,664 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443527914] [2019-10-14 23:43:19,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:43:19,665 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:19,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:43:19,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:43:19,666 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 17 states. [2019-10-14 23:43:19,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:19,872 INFO L93 Difference]: Finished difference Result 91 states and 111 transitions. [2019-10-14 23:43:19,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:43:19,872 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2019-10-14 23:43:19,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:19,873 INFO L225 Difference]: With dead ends: 91 [2019-10-14 23:43:19,874 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 23:43:19,874 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:43:19,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 23:43:19,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2019-10-14 23:43:19,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-14 23:43:19,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2019-10-14 23:43:19,880 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 81 [2019-10-14 23:43:19,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:19,881 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2019-10-14 23:43:19,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 23:43:19,881 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2019-10-14 23:43:19,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-14 23:43:19,882 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:19,882 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:20,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:20,083 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:20,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:20,084 INFO L82 PathProgramCache]: Analyzing trace with hash -313307898, now seen corresponding path program 10 times [2019-10-14 23:43:20,084 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:20,084 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751567651] [2019-10-14 23:43:20,084 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:20,084 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:20,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-14 23:43:20,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751567651] [2019-10-14 23:43:20,260 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253358960] [2019-10-14 23:43:20,260 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:20,332 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:20,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:20,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 23:43:20,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-14 23:43:20,369 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:20,370 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 23:43:20,370 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130065755] [2019-10-14 23:43:20,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:43:20,371 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:20,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:43:20,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:43:20,372 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 15 states. [2019-10-14 23:43:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:20,529 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2019-10-14 23:43:20,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:43:20,530 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 92 [2019-10-14 23:43:20,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:20,531 INFO L225 Difference]: With dead ends: 94 [2019-10-14 23:43:20,531 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 23:43:20,531 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:43:20,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 23:43:20,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-10-14 23:43:20,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 23:43:20,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2019-10-14 23:43:20,542 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 92 [2019-10-14 23:43:20,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:20,543 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2019-10-14 23:43:20,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:43:20,543 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2019-10-14 23:43:20,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-14 23:43:20,544 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:20,545 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:20,748 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:20,748 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:20,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:20,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1157101992, now seen corresponding path program 11 times [2019-10-14 23:43:20,749 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:20,750 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430326193] [2019-10-14 23:43:20,750 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:20,750 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:20,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-14 23:43:20,959 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430326193] [2019-10-14 23:43:20,959 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287540210] [2019-10-14 23:43:20,959 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:21,197 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-10-14 23:43:21,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:21,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:43:21,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 116 proven. 22 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2019-10-14 23:43:21,284 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:21,284 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-10-14 23:43:21,284 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059823562] [2019-10-14 23:43:21,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:43:21,285 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:21,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:43:21,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:43:21,286 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 20 states. [2019-10-14 23:43:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:21,580 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2019-10-14 23:43:21,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:43:21,581 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2019-10-14 23:43:21,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:21,582 INFO L225 Difference]: With dead ends: 101 [2019-10-14 23:43:21,582 INFO L226 Difference]: Without dead ends: 69 [2019-10-14 23:43:21,583 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:43:21,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-14 23:43:21,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2019-10-14 23:43:21,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-14 23:43:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2019-10-14 23:43:21,589 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 94 [2019-10-14 23:43:21,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:21,590 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2019-10-14 23:43:21,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:43:21,590 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2019-10-14 23:43:21,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-14 23:43:21,591 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:21,591 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 12, 12, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:21,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:21,804 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:21,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:21,805 INFO L82 PathProgramCache]: Analyzing trace with hash -135209269, now seen corresponding path program 12 times [2019-10-14 23:43:21,805 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:21,805 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172032670] [2019-10-14 23:43:21,806 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:21,806 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:21,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,035 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2019-10-14 23:43:22,036 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172032670] [2019-10-14 23:43:22,036 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856603815] [2019-10-14 23:43:22,036 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 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 [2019-10-14 23:43:22,135 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 23:43:22,136 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:22,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:43:22,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 180 proven. 4 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2019-10-14 23:43:22,209 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:22,209 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5] total 19 [2019-10-14 23:43:22,209 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675596874] [2019-10-14 23:43:22,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:43:22,210 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:22,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:43:22,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:43:22,211 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand 19 states. [2019-10-14 23:43:22,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:22,500 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2019-10-14 23:43:22,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:43:22,500 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 105 [2019-10-14 23:43:22,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:22,501 INFO L225 Difference]: With dead ends: 107 [2019-10-14 23:43:22,502 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 23:43:22,502 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:43:22,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 23:43:22,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-10-14 23:43:22,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-14 23:43:22,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2019-10-14 23:43:22,509 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 105 [2019-10-14 23:43:22,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:22,510 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2019-10-14 23:43:22,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:43:22,510 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2019-10-14 23:43:22,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-14 23:43:22,512 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:22,512 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:22,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:22,718 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:22,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:22,719 INFO L82 PathProgramCache]: Analyzing trace with hash -929187861, now seen corresponding path program 13 times [2019-10-14 23:43:22,719 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:22,719 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163786502] [2019-10-14 23:43:22,719 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:22,720 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:22,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 23:43:22,996 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163786502] [2019-10-14 23:43:22,996 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709273258] [2019-10-14 23:43:22,997 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 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 [2019-10-14 23:43:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:43:23,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 23:43:23,112 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:23,112 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 23:43:23,112 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731692] [2019-10-14 23:43:23,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:43:23,113 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:23,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:43:23,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:43:23,114 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 18 states. [2019-10-14 23:43:23,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:23,279 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2019-10-14 23:43:23,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:43:23,279 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2019-10-14 23:43:23,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:23,280 INFO L225 Difference]: With dead ends: 110 [2019-10-14 23:43:23,280 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 23:43:23,281 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:43:23,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 23:43:23,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-10-14 23:43:23,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-14 23:43:23,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2019-10-14 23:43:23,287 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 109 [2019-10-14 23:43:23,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:23,287 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2019-10-14 23:43:23,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:43:23,287 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2019-10-14 23:43:23,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-14 23:43:23,291 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:23,291 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:23,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:23,493 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:23,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:23,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1783127159, now seen corresponding path program 14 times [2019-10-14 23:43:23,494 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:23,494 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151694042] [2019-10-14 23:43:23,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:23,495 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:23,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 23:43:23,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151694042] [2019-10-14 23:43:23,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234994755] [2019-10-14 23:43:23,754 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 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 [2019-10-14 23:43:23,858 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:23,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:23,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 23:43:23,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 23:43:23,893 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:23,893 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 23:43:23,893 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740657546] [2019-10-14 23:43:23,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:43:23,894 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:23,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:43:23,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:43:23,896 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 19 states. [2019-10-14 23:43:24,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:24,062 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2019-10-14 23:43:24,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:43:24,062 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 111 [2019-10-14 23:43:24,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:24,063 INFO L225 Difference]: With dead ends: 112 [2019-10-14 23:43:24,064 INFO L226 Difference]: Without dead ends: 75 [2019-10-14 23:43:24,064 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:43:24,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-14 23:43:24,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-10-14 23:43:24,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-14 23:43:24,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2019-10-14 23:43:24,072 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 111 [2019-10-14 23:43:24,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:24,072 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2019-10-14 23:43:24,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:43:24,072 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2019-10-14 23:43:24,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-14 23:43:24,073 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:24,073 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:24,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:24,279 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:24,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:24,280 INFO L82 PathProgramCache]: Analyzing trace with hash -2080039001, now seen corresponding path program 15 times [2019-10-14 23:43:24,280 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:24,280 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834314570] [2019-10-14 23:43:24,280 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:24,280 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:24,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 23:43:24,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834314570] [2019-10-14 23:43:24,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457142955] [2019-10-14 23:43:24,542 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 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 [2019-10-14 23:43:24,662 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-14 23:43:24,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:24,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:43:24,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:24,776 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 180 proven. 9 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2019-10-14 23:43:24,777 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:24,777 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6] total 23 [2019-10-14 23:43:24,777 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154058280] [2019-10-14 23:43:24,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 23:43:24,779 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:24,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 23:43:24,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:43:24,780 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 23 states. [2019-10-14 23:43:25,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:25,052 INFO L93 Difference]: Finished difference Result 117 states and 136 transitions. [2019-10-14 23:43:25,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:43:25,052 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 113 [2019-10-14 23:43:25,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:25,053 INFO L225 Difference]: With dead ends: 117 [2019-10-14 23:43:25,053 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 23:43:25,054 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:43:25,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 23:43:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2019-10-14 23:43:25,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-14 23:43:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2019-10-14 23:43:25,060 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 113 [2019-10-14 23:43:25,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:25,060 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2019-10-14 23:43:25,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 23:43:25,060 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2019-10-14 23:43:25,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-14 23:43:25,061 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:25,062 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:25,272 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:25,272 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:25,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:25,273 INFO L82 PathProgramCache]: Analyzing trace with hash -901827641, now seen corresponding path program 16 times [2019-10-14 23:43:25,273 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:25,273 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447244866] [2019-10-14 23:43:25,273 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:25,273 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:25,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 23:43:25,545 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447244866] [2019-10-14 23:43:25,545 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461667621] [2019-10-14 23:43:25,545 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 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 [2019-10-14 23:43:25,654 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:25,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:25,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 23:43:25,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 23:43:25,693 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:25,694 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 23:43:25,694 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938643980] [2019-10-14 23:43:25,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:43:25,694 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:25,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:43:25,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:43:25,695 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 21 states. [2019-10-14 23:43:25,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:25,871 INFO L93 Difference]: Finished difference Result 120 states and 138 transitions. [2019-10-14 23:43:25,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:43:25,872 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 117 [2019-10-14 23:43:25,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:25,873 INFO L225 Difference]: With dead ends: 120 [2019-10-14 23:43:25,873 INFO L226 Difference]: Without dead ends: 81 [2019-10-14 23:43:25,873 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:43:25,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-14 23:43:25,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2019-10-14 23:43:25,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-14 23:43:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2019-10-14 23:43:25,879 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 117 [2019-10-14 23:43:25,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:25,880 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2019-10-14 23:43:25,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:43:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2019-10-14 23:43:25,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-14 23:43:25,881 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:25,881 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:26,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:26,091 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:26,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:26,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1032150683, now seen corresponding path program 17 times [2019-10-14 23:43:26,091 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:26,091 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848705220] [2019-10-14 23:43:26,091 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:26,092 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:26,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-14 23:43:26,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848705220] [2019-10-14 23:43:26,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449578963] [2019-10-14 23:43:26,357 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 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 [2019-10-14 23:43:27,042 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-14 23:43:27,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:27,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:43:27,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 174 proven. 35 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2019-10-14 23:43:27,175 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:27,175 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8] total 27 [2019-10-14 23:43:27,175 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900289127] [2019-10-14 23:43:27,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:43:27,177 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:27,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:43:27,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=483, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:43:27,178 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 27 states. [2019-10-14 23:43:27,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:27,541 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2019-10-14 23:43:27,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:43:27,541 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 119 [2019-10-14 23:43:27,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:27,542 INFO L225 Difference]: With dead ends: 127 [2019-10-14 23:43:27,542 INFO L226 Difference]: Without dead ends: 88 [2019-10-14 23:43:27,543 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:43:27,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-14 23:43:27,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2019-10-14 23:43:27,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-10-14 23:43:27,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2019-10-14 23:43:27,547 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 119 [2019-10-14 23:43:27,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:27,549 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2019-10-14 23:43:27,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:43:27,549 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2019-10-14 23:43:27,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-14 23:43:27,550 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:27,550 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:27,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:27,751 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:27,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:27,752 INFO L82 PathProgramCache]: Analyzing trace with hash -576331982, now seen corresponding path program 18 times [2019-10-14 23:43:27,752 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:27,752 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880070173] [2019-10-14 23:43:27,752 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:27,752 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:27,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2019-10-14 23:43:28,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880070173] [2019-10-14 23:43:28,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272538647] [2019-10-14 23:43:28,032 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 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 [2019-10-14 23:43:28,264 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-14 23:43:28,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:28,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:43:28,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 250 proven. 16 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2019-10-14 23:43:28,396 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:28,396 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7] total 27 [2019-10-14 23:43:28,396 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634357881] [2019-10-14 23:43:28,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:43:28,397 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:28,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:43:28,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:43:28,398 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 27 states. [2019-10-14 23:43:28,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:28,617 INFO L93 Difference]: Finished difference Result 133 states and 154 transitions. [2019-10-14 23:43:28,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:43:28,620 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 130 [2019-10-14 23:43:28,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:28,621 INFO L225 Difference]: With dead ends: 133 [2019-10-14 23:43:28,621 INFO L226 Difference]: Without dead ends: 91 [2019-10-14 23:43:28,622 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:43:28,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-14 23:43:28,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2019-10-14 23:43:28,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-14 23:43:28,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2019-10-14 23:43:28,631 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 130 [2019-10-14 23:43:28,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:28,631 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2019-10-14 23:43:28,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:43:28,631 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2019-10-14 23:43:28,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 23:43:28,635 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:28,635 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:28,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:28,836 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:28,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:28,836 INFO L82 PathProgramCache]: Analyzing trace with hash 2079637010, now seen corresponding path program 19 times [2019-10-14 23:43:28,836 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:28,836 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531310457] [2019-10-14 23:43:28,837 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:28,837 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:28,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-10-14 23:43:29,127 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531310457] [2019-10-14 23:43:29,127 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872330801] [2019-10-14 23:43:29,127 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 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 [2019-10-14 23:43:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:29,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 23:43:29,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-10-14 23:43:29,253 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:29,254 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 23:43:29,254 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146461528] [2019-10-14 23:43:29,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:43:29,255 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:29,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:43:29,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:43:29,255 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 24 states. [2019-10-14 23:43:29,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:29,462 INFO L93 Difference]: Finished difference Result 136 states and 156 transitions. [2019-10-14 23:43:29,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:43:29,462 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 134 [2019-10-14 23:43:29,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:29,463 INFO L225 Difference]: With dead ends: 136 [2019-10-14 23:43:29,463 INFO L226 Difference]: Without dead ends: 92 [2019-10-14 23:43:29,464 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:43:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-14 23:43:29,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-10-14 23:43:29,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 23:43:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2019-10-14 23:43:29,469 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 134 [2019-10-14 23:43:29,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:29,469 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2019-10-14 23:43:29,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:43:29,469 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2019-10-14 23:43:29,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-14 23:43:29,470 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:29,470 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:29,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:29,672 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:29,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:29,672 INFO L82 PathProgramCache]: Analyzing trace with hash 275415092, now seen corresponding path program 20 times [2019-10-14 23:43:29,673 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:29,673 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032551189] [2019-10-14 23:43:29,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:29,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:29,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-10-14 23:43:30,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032551189] [2019-10-14 23:43:30,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676361734] [2019-10-14 23:43:30,010 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 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 [2019-10-14 23:43:30,114 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:30,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:30,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 23:43:30,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-10-14 23:43:30,159 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:30,160 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 23:43:30,160 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445804690] [2019-10-14 23:43:30,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 23:43:30,161 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:30,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 23:43:30,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:43:30,162 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand 25 states. [2019-10-14 23:43:30,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:30,391 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2019-10-14 23:43:30,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 23:43:30,391 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 136 [2019-10-14 23:43:30,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:30,393 INFO L225 Difference]: With dead ends: 138 [2019-10-14 23:43:30,393 INFO L226 Difference]: Without dead ends: 94 [2019-10-14 23:43:30,394 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:43:30,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-14 23:43:30,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-10-14 23:43:30,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-14 23:43:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2019-10-14 23:43:30,401 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 136 [2019-10-14 23:43:30,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:30,401 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2019-10-14 23:43:30,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 23:43:30,402 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2019-10-14 23:43:30,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-14 23:43:30,403 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:30,403 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:30,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:30,607 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:30,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:30,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1584939478, now seen corresponding path program 21 times [2019-10-14 23:43:30,608 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:30,609 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605723609] [2019-10-14 23:43:30,609 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:30,609 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:30,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-10-14 23:43:31,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605723609] [2019-10-14 23:43:31,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582934414] [2019-10-14 23:43:31,059 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 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 [2019-10-14 23:43:31,174 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-14 23:43:31,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:31,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:43:31,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 248 proven. 51 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2019-10-14 23:43:31,305 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:31,306 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2019-10-14 23:43:31,306 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844749124] [2019-10-14 23:43:31,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 23:43:31,307 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:31,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 23:43:31,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:43:31,308 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand 32 states. [2019-10-14 23:43:31,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:31,848 INFO L93 Difference]: Finished difference Result 145 states and 171 transitions. [2019-10-14 23:43:31,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 23:43:31,849 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 138 [2019-10-14 23:43:31,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:31,850 INFO L225 Difference]: With dead ends: 145 [2019-10-14 23:43:31,850 INFO L226 Difference]: Without dead ends: 101 [2019-10-14 23:43:31,851 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 23:43:31,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-14 23:43:31,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2019-10-14 23:43:31,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-14 23:43:31,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 109 transitions. [2019-10-14 23:43:31,856 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 109 transitions. Word has length 138 [2019-10-14 23:43:31,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:31,857 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 109 transitions. [2019-10-14 23:43:31,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 23:43:31,857 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 109 transitions. [2019-10-14 23:43:31,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-14 23:43:31,859 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:31,859 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:32,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:32,064 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:32,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:32,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1061708125, now seen corresponding path program 22 times [2019-10-14 23:43:32,064 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:32,064 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013423455] [2019-10-14 23:43:32,065 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:32,065 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:32,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:32,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2019-10-14 23:43:32,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013423455] [2019-10-14 23:43:32,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090549589] [2019-10-14 23:43:32,434 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 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 [2019-10-14 23:43:32,571 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:32,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:32,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:43:32,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 330 proven. 70 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2019-10-14 23:43:32,740 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:32,740 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2019-10-14 23:43:32,741 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731490339] [2019-10-14 23:43:32,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 23:43:32,742 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:32,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 23:43:32,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=776, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:43:32,743 INFO L87 Difference]: Start difference. First operand 98 states and 109 transitions. Second operand 34 states. [2019-10-14 23:43:33,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:33,285 INFO L93 Difference]: Finished difference Result 153 states and 181 transitions. [2019-10-14 23:43:33,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 23:43:33,286 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 149 [2019-10-14 23:43:33,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:33,287 INFO L225 Difference]: With dead ends: 153 [2019-10-14 23:43:33,287 INFO L226 Difference]: Without dead ends: 106 [2019-10-14 23:43:33,289 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=434, Invalid=1288, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 23:43:33,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-14 23:43:33,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2019-10-14 23:43:33,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-14 23:43:33,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2019-10-14 23:43:33,295 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 149 [2019-10-14 23:43:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:33,295 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2019-10-14 23:43:33,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 23:43:33,295 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2019-10-14 23:43:33,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-14 23:43:33,296 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:33,296 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:33,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:33,501 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:33,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:33,501 INFO L82 PathProgramCache]: Analyzing trace with hash 789597626, now seen corresponding path program 23 times [2019-10-14 23:43:33,502 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:33,502 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682477715] [2019-10-14 23:43:33,503 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:33,503 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:33,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:33,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1469 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2019-10-14 23:43:33,925 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682477715] [2019-10-14 23:43:33,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864646012] [2019-10-14 23:43:33,926 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 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 [2019-10-14 23:43:37,339 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-10-14 23:43:37,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:37,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:43:37,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1469 backedges. 420 proven. 92 refuted. 0 times theorem prover too weak. 957 trivial. 0 not checked. [2019-10-14 23:43:37,557 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:37,557 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 11] total 36 [2019-10-14 23:43:37,557 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481369715] [2019-10-14 23:43:37,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 23:43:37,558 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:37,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 23:43:37,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=879, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 23:43:37,559 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 36 states. [2019-10-14 23:43:38,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:38,200 INFO L93 Difference]: Finished difference Result 161 states and 191 transitions. [2019-10-14 23:43:38,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-14 23:43:38,201 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 160 [2019-10-14 23:43:38,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:38,202 INFO L225 Difference]: With dead ends: 161 [2019-10-14 23:43:38,203 INFO L226 Difference]: Without dead ends: 111 [2019-10-14 23:43:38,204 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=489, Invalid=1491, Unknown=0, NotChecked=0, Total=1980 [2019-10-14 23:43:38,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-14 23:43:38,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2019-10-14 23:43:38,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-10-14 23:43:38,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 121 transitions. [2019-10-14 23:43:38,209 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 121 transitions. Word has length 160 [2019-10-14 23:43:38,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:38,210 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 121 transitions. [2019-10-14 23:43:38,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 23:43:38,210 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 121 transitions. [2019-10-14 23:43:38,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-14 23:43:38,211 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:38,211 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 27, 24, 24, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:38,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:38,419 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:38,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:38,420 INFO L82 PathProgramCache]: Analyzing trace with hash -617570183, now seen corresponding path program 24 times [2019-10-14 23:43:38,420 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:38,420 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366720910] [2019-10-14 23:43:38,420 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:38,421 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:38,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1174 trivial. 0 not checked. [2019-10-14 23:43:39,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366720910] [2019-10-14 23:43:39,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866838653] [2019-10-14 23:43:39,190 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 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 [2019-10-14 23:43:39,697 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 23:43:39,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:39,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:43:39,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 532 proven. 25 refuted. 0 times theorem prover too weak. 1193 trivial. 0 not checked. [2019-10-14 23:43:39,825 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:39,825 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 8] total 34 [2019-10-14 23:43:39,825 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789650393] [2019-10-14 23:43:39,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 23:43:39,826 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:39,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 23:43:39,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:43:39,827 INFO L87 Difference]: Start difference. First operand 108 states and 121 transitions. Second operand 34 states. [2019-10-14 23:43:40,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:40,152 INFO L93 Difference]: Finished difference Result 167 states and 194 transitions. [2019-10-14 23:43:40,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 23:43:40,153 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 171 [2019-10-14 23:43:40,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:40,154 INFO L225 Difference]: With dead ends: 167 [2019-10-14 23:43:40,155 INFO L226 Difference]: Without dead ends: 114 [2019-10-14 23:43:40,156 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:43:40,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-10-14 23:43:40,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2019-10-14 23:43:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-14 23:43:40,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 125 transitions. [2019-10-14 23:43:40,162 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 125 transitions. Word has length 171 [2019-10-14 23:43:40,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:40,162 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 125 transitions. [2019-10-14 23:43:40,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 23:43:40,162 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 125 transitions. [2019-10-14 23:43:40,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-14 23:43:40,163 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:40,163 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 27, 25, 25, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:40,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:40,368 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:40,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:40,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1435108249, now seen corresponding path program 25 times [2019-10-14 23:43:40,369 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:40,369 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370458683] [2019-10-14 23:43:40,370 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:40,370 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:40,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:40,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1810 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1185 trivial. 0 not checked. [2019-10-14 23:43:40,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370458683] [2019-10-14 23:43:40,995 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023043860] [2019-10-14 23:43:40,995 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 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 [2019-10-14 23:43:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:41,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 23:43:41,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1810 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1185 trivial. 0 not checked. [2019-10-14 23:43:41,155 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:41,156 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-14 23:43:41,156 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191371620] [2019-10-14 23:43:41,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 23:43:41,156 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:41,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 23:43:41,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:43:41,157 INFO L87 Difference]: Start difference. First operand 112 states and 125 transitions. Second operand 30 states. [2019-10-14 23:43:41,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:41,418 INFO L93 Difference]: Finished difference Result 170 states and 196 transitions. [2019-10-14 23:43:41,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 23:43:41,419 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 175 [2019-10-14 23:43:41,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:41,420 INFO L225 Difference]: With dead ends: 170 [2019-10-14 23:43:41,420 INFO L226 Difference]: Without dead ends: 115 [2019-10-14 23:43:41,421 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:43:41,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-14 23:43:41,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-10-14 23:43:41,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-10-14 23:43:41,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2019-10-14 23:43:41,429 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 175 [2019-10-14 23:43:41,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:41,430 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2019-10-14 23:43:41,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 23:43:41,430 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2019-10-14 23:43:41,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-14 23:43:41,431 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:41,431 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:41,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:41,633 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:41,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:41,633 INFO L82 PathProgramCache]: Analyzing trace with hash 912756663, now seen corresponding path program 26 times [2019-10-14 23:43:41,634 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:41,634 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620436853] [2019-10-14 23:43:41,634 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:41,634 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:41,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1185 trivial. 0 not checked. [2019-10-14 23:43:42,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620436853] [2019-10-14 23:43:42,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286359145] [2019-10-14 23:43:42,180 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 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 [2019-10-14 23:43:42,301 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:42,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:42,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 23:43:42,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1185 trivial. 0 not checked. [2019-10-14 23:43:42,348 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:42,348 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-14 23:43:42,349 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092406361] [2019-10-14 23:43:42,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 23:43:42,351 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:42,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 23:43:42,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:43:42,352 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand 31 states. [2019-10-14 23:43:42,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:42,584 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2019-10-14 23:43:42,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 23:43:42,585 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 177 [2019-10-14 23:43:42,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:42,586 INFO L225 Difference]: With dead ends: 172 [2019-10-14 23:43:42,586 INFO L226 Difference]: Without dead ends: 117 [2019-10-14 23:43:42,587 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:43:42,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-14 23:43:42,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-10-14 23:43:42,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-10-14 23:43:42,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2019-10-14 23:43:42,593 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 177 [2019-10-14 23:43:42,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:42,593 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2019-10-14 23:43:42,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 23:43:42,594 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2019-10-14 23:43:42,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-14 23:43:42,595 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:42,595 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:42,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:42,799 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:42,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:42,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1444056149, now seen corresponding path program 27 times [2019-10-14 23:43:42,800 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:42,800 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098711326] [2019-10-14 23:43:42,801 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:42,801 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:42,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1185 trivial. 0 not checked. [2019-10-14 23:43:43,584 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098711326] [2019-10-14 23:43:43,585 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940756079] [2019-10-14 23:43:43,585 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 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 [2019-10-14 23:43:43,872 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-14 23:43:43,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:43,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:43:43,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 532 proven. 36 refuted. 0 times theorem prover too weak. 1346 trivial. 0 not checked. [2019-10-14 23:43:44,057 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:44,057 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 9] total 38 [2019-10-14 23:43:44,057 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396053208] [2019-10-14 23:43:44,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-14 23:43:44,058 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:44,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-14 23:43:44,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=934, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 23:43:44,059 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand 38 states. [2019-10-14 23:43:44,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:44,265 INFO L93 Difference]: Finished difference Result 177 states and 204 transitions. [2019-10-14 23:43:44,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-14 23:43:44,265 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 179 [2019-10-14 23:43:44,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:44,266 INFO L225 Difference]: With dead ends: 177 [2019-10-14 23:43:44,267 INFO L226 Difference]: Without dead ends: 122 [2019-10-14 23:43:44,268 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=472, Invalid=934, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 23:43:44,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-10-14 23:43:44,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2019-10-14 23:43:44,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-10-14 23:43:44,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 133 transitions. [2019-10-14 23:43:44,273 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 133 transitions. Word has length 179 [2019-10-14 23:43:44,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:44,273 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 133 transitions. [2019-10-14 23:43:44,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-14 23:43:44,274 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 133 transitions. [2019-10-14 23:43:44,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-14 23:43:44,275 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:44,275 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:44,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:44,480 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:44,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:44,481 INFO L82 PathProgramCache]: Analyzing trace with hash 2108811893, now seen corresponding path program 28 times [2019-10-14 23:43:44,481 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:44,481 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403415277] [2019-10-14 23:43:44,481 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:44,481 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:44,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1982 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1198 trivial. 0 not checked. [2019-10-14 23:43:45,092 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403415277] [2019-10-14 23:43:45,092 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574431124] [2019-10-14 23:43:45,092 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 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 [2019-10-14 23:43:45,231 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:45,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:45,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 23:43:45,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1982 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1198 trivial. 0 not checked. [2019-10-14 23:43:45,280 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:45,280 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-10-14 23:43:45,280 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062267077] [2019-10-14 23:43:45,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 23:43:45,282 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:45,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 23:43:45,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:43:45,283 INFO L87 Difference]: Start difference. First operand 120 states and 133 transitions. Second operand 33 states. [2019-10-14 23:43:45,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:45,525 INFO L93 Difference]: Finished difference Result 180 states and 206 transitions. [2019-10-14 23:43:45,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 23:43:45,525 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 183 [2019-10-14 23:43:45,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:45,526 INFO L225 Difference]: With dead ends: 180 [2019-10-14 23:43:45,526 INFO L226 Difference]: Without dead ends: 123 [2019-10-14 23:43:45,527 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:43:45,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-10-14 23:43:45,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2019-10-14 23:43:45,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-10-14 23:43:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 135 transitions. [2019-10-14 23:43:45,540 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 135 transitions. Word has length 183 [2019-10-14 23:43:45,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:45,541 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 135 transitions. [2019-10-14 23:43:45,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 23:43:45,541 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 135 transitions. [2019-10-14 23:43:45,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-10-14 23:43:45,542 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:45,542 INFO L380 BasicCegarLoop]: trace histogram [29, 29, 27, 27, 27, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:45,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:45,748 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:45,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:45,748 INFO L82 PathProgramCache]: Analyzing trace with hash -28804973, now seen corresponding path program 29 times [2019-10-14 23:43:45,748 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:45,748 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147129988] [2019-10-14 23:43:45,748 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:45,748 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:45,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2039 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1198 trivial. 0 not checked. [2019-10-14 23:43:46,441 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147129988] [2019-10-14 23:43:46,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568487957] [2019-10-14 23:43:46,442 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true