java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:46:52,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:46:52,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:46:52,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:46:52,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:46:52,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:46:52,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:46:52,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:46:52,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:46:52,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:46:52,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:46:52,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:46:52,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:46:52,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:46:52,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:46:52,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:46:52,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:46:52,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:46:52,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:46:52,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:46:52,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:46:52,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:46:52,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:46:52,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:46:52,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:46:52,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:46:52,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:46:52,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:46:52,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:46:52,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:46:52,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:46:52,270 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:46:52,271 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:46:52,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:46:52,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:46:52,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:46:52,276 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:46:52,297 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:46:52,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:46:52,299 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:46:52,299 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:46:52,299 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:46:52,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:46:52,300 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:46:52,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:46:52,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:46:52,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:46:52,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:46:52,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:46:52,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:46:52,302 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:46:52,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:46:52,303 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:46:52,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:46:52,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:46:52,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:46:52,304 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:46:52,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:46:52,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:46:52,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:46:52,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:46:52,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:46:52,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:46:52,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:46:52,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:46:52,306 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:46:52,665 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:46:52,684 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:46:52,688 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:46:52,689 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:46:52,689 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:46:52,690 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_02.i [2019-10-14 21:46:52,751 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3968581b3/972d53ba906a4e81a78f669afea37776/FLAGebb0b7405 [2019-10-14 21:46:53,161 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:46:53,161 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_02.i [2019-10-14 21:46:53,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3968581b3/972d53ba906a4e81a78f669afea37776/FLAGebb0b7405 [2019-10-14 21:46:53,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3968581b3/972d53ba906a4e81a78f669afea37776 [2019-10-14 21:46:53,580 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:46:53,581 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:46:53,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:53,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:46:53,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:46:53,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:53" (1/1) ... [2019-10-14 21:46:53,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a266f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53, skipping insertion in model container [2019-10-14 21:46:53,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:53" (1/1) ... [2019-10-14 21:46:53,597 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:46:53,614 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:46:53,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:53,864 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:46:53,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:53,921 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:46:53,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53 WrapperNode [2019-10-14 21:46:53,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:53,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:46:53,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:46:53,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:46:54,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53" (1/1) ... [2019-10-14 21:46:54,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53" (1/1) ... [2019-10-14 21:46:54,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53" (1/1) ... [2019-10-14 21:46:54,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53" (1/1) ... [2019-10-14 21:46:54,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53" (1/1) ... [2019-10-14 21:46:54,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53" (1/1) ... [2019-10-14 21:46:54,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53" (1/1) ... [2019-10-14 21:46:54,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:46:54,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:46:54,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:46:54,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:46:54,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:46:54,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:46:54,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:46:54,134 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:46:54,134 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:46:54,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:46:54,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:46:54,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:46:54,135 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:46:54,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:46:54,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:46:54,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:46:54,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:46:54,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:46:54,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:46:54,363 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:46:54,364 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:46:54,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:54 BoogieIcfgContainer [2019-10-14 21:46:54,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:46:54,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:46:54,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:46:54,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:46:54,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:46:53" (1/3) ... [2019-10-14 21:46:54,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ac69f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:54, skipping insertion in model container [2019-10-14 21:46:54,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:53" (2/3) ... [2019-10-14 21:46:54,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ac69f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:54, skipping insertion in model container [2019-10-14 21:46:54,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:54" (3/3) ... [2019-10-14 21:46:54,373 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_02.i [2019-10-14 21:46:54,384 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:46:54,399 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:46:54,417 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:46:54,451 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:46:54,451 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:46:54,452 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:46:54,452 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:46:54,455 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:46:54,456 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:46:54,456 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:46:54,456 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:46:54,503 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-14 21:46:54,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:46:54,511 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:54,512 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:54,515 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:54,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:54,522 INFO L82 PathProgramCache]: Analyzing trace with hash -2029643862, now seen corresponding path program 1 times [2019-10-14 21:46:54,541 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:54,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684095550] [2019-10-14 21:46:54,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:54,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:54,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:54,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:46:54,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684095550] [2019-10-14 21:46:54,709 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:54,709 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:46:54,710 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993189168] [2019-10-14 21:46:54,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:46:54,715 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:54,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:46:54,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:46:54,734 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-10-14 21:46:54,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:54,839 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2019-10-14 21:46:54,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:46:54,841 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-14 21:46:54,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:54,849 INFO L225 Difference]: With dead ends: 41 [2019-10-14 21:46:54,849 INFO L226 Difference]: Without dead ends: 19 [2019-10-14 21:46:54,853 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:46:54,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-14 21:46:54,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-14 21:46:54,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-14 21:46:54,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-10-14 21:46:54,891 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2019-10-14 21:46:54,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:54,891 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-10-14 21:46:54,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:46:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-10-14 21:46:54,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:46:54,893 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:54,893 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:54,893 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:54,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:54,894 INFO L82 PathProgramCache]: Analyzing trace with hash 905206694, now seen corresponding path program 1 times [2019-10-14 21:46:54,894 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:54,895 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105581872] [2019-10-14 21:46:54,895 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:54,895 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:54,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:46:54,983 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105581872] [2019-10-14 21:46:54,983 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:54,984 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:46:54,984 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920357073] [2019-10-14 21:46:54,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:46:54,986 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:54,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:46:54,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:54,987 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2019-10-14 21:46:55,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:55,092 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-10-14 21:46:55,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:46:55,093 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-14 21:46:55,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:55,094 INFO L225 Difference]: With dead ends: 32 [2019-10-14 21:46:55,094 INFO L226 Difference]: Without dead ends: 20 [2019-10-14 21:46:55,095 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:55,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-14 21:46:55,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-14 21:46:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-14 21:46:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-14 21:46:55,102 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2019-10-14 21:46:55,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:55,103 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-14 21:46:55,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:46:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-14 21:46:55,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:46:55,104 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:55,104 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:55,104 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:55,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:55,105 INFO L82 PathProgramCache]: Analyzing trace with hash -764882998, now seen corresponding path program 1 times [2019-10-14 21:46:55,105 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:55,105 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749597756] [2019-10-14 21:46:55,106 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:55,106 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:55,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:55,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749597756] [2019-10-14 21:46:55,180 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:55,180 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:46:55,180 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551197214] [2019-10-14 21:46:55,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:46:55,181 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:55,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:46:55,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:55,182 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2019-10-14 21:46:55,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:55,291 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-10-14 21:46:55,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:46:55,292 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-14 21:46:55,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:55,295 INFO L225 Difference]: With dead ends: 34 [2019-10-14 21:46:55,295 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 21:46:55,296 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:55,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 21:46:55,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-10-14 21:46:55,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 21:46:55,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-10-14 21:46:55,308 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2019-10-14 21:46:55,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:55,308 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-10-14 21:46:55,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:46:55,309 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-10-14 21:46:55,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:46:55,309 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:55,310 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:55,310 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:55,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:55,310 INFO L82 PathProgramCache]: Analyzing trace with hash -59429947, now seen corresponding path program 1 times [2019-10-14 21:46:55,311 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:55,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340444860] [2019-10-14 21:46:55,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:55,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:55,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:55,409 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340444860] [2019-10-14 21:46:55,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296442327] [2019-10-14 21:46:55,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:55,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:46:55,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:55,558 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:55,558 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:46:55,559 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102441208] [2019-10-14 21:46:55,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:46:55,560 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:55,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:46:55,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:55,562 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2019-10-14 21:46:55,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:55,690 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-10-14 21:46:55,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:46:55,691 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-10-14 21:46:55,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:55,692 INFO L225 Difference]: With dead ends: 43 [2019-10-14 21:46:55,692 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:46:55,693 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:55,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:46:55,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2019-10-14 21:46:55,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:46:55,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-14 21:46:55,715 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2019-10-14 21:46:55,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:55,716 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-14 21:46:55,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:46:55,716 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-14 21:46:55,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:46:55,717 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:55,717 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:55,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:55,924 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:55,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:55,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1897825622, now seen corresponding path program 2 times [2019-10-14 21:46:55,926 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:55,926 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240448980] [2019-10-14 21:46:55,927 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:55,927 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:55,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:55,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:46:56,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240448980] [2019-10-14 21:46:56,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144255759] [2019-10-14 21:46:56,047 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:56,098 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:56,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:56,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:46:56,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:46:56,136 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:56,136 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2019-10-14 21:46:56,136 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371878470] [2019-10-14 21:46:56,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:46:56,137 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:56,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:46:56,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:46:56,138 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 9 states. [2019-10-14 21:46:56,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:56,252 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2019-10-14 21:46:56,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:46:56,253 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-10-14 21:46:56,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:56,254 INFO L225 Difference]: With dead ends: 50 [2019-10-14 21:46:56,254 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 21:46:56,255 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:46:56,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 21:46:56,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2019-10-14 21:46:56,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:46:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-10-14 21:46:56,262 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2019-10-14 21:46:56,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:56,262 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-10-14 21:46:56,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:46:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-10-14 21:46:56,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:46:56,263 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:56,264 INFO L380 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:56,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:56,465 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:56,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:56,466 INFO L82 PathProgramCache]: Analyzing trace with hash -456457883, now seen corresponding path program 3 times [2019-10-14 21:46:56,466 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:56,467 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742869631] [2019-10-14 21:46:56,467 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:56,467 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:56,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:46:56,597 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742869631] [2019-10-14 21:46:56,597 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441686119] [2019-10-14 21:46:56,598 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:56,642 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:46:56,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:56,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:46:56,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:46:56,666 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:56,666 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:46:56,666 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571608081] [2019-10-14 21:46:56,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:46:56,667 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:56,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:46:56,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:46:56,668 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2019-10-14 21:46:56,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:56,787 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2019-10-14 21:46:56,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:46:56,788 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-10-14 21:46:56,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:56,789 INFO L225 Difference]: With dead ends: 50 [2019-10-14 21:46:56,789 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 21:46:56,790 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:46:56,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 21:46:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2019-10-14 21:46:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:46:56,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-10-14 21:46:56,796 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2019-10-14 21:46:56,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:56,796 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-10-14 21:46:56,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:46:56,797 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-10-14 21:46:56,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:46:56,798 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:56,798 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:56,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:56,999 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:56,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:56,999 INFO L82 PathProgramCache]: Analyzing trace with hash 911814026, now seen corresponding path program 4 times [2019-10-14 21:46:56,999 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:57,000 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921766865] [2019-10-14 21:46:57,000 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:57,000 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:57,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:57,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:46:57,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921766865] [2019-10-14 21:46:57,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367721430] [2019-10-14 21:46:57,088 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:57,133 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:57,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:57,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:46:57,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:46:57,182 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:57,183 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-10-14 21:46:57,183 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396506498] [2019-10-14 21:46:57,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:46:57,184 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:57,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:46:57,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:46:57,185 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 12 states. [2019-10-14 21:46:57,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:57,377 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2019-10-14 21:46:57,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:46:57,378 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2019-10-14 21:46:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:57,379 INFO L225 Difference]: With dead ends: 63 [2019-10-14 21:46:57,379 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 21:46:57,379 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:46:57,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 21:46:57,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2019-10-14 21:46:57,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:46:57,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-14 21:46:57,386 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 24 [2019-10-14 21:46:57,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:57,386 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-14 21:46:57,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:46:57,386 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-14 21:46:57,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 21:46:57,387 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:57,388 INFO L380 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:57,589 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:57,590 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:57,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:57,591 INFO L82 PathProgramCache]: Analyzing trace with hash 569821353, now seen corresponding path program 5 times [2019-10-14 21:46:57,591 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:57,592 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781738913] [2019-10-14 21:46:57,592 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:57,592 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:57,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:46:57,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781738913] [2019-10-14 21:46:57,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736272944] [2019-10-14 21:46:57,726 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:57,888 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-14 21:46:57,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:57,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:46:57,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:46:57,910 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:57,910 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:46:57,910 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427924029] [2019-10-14 21:46:57,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:46:57,911 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:57,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:46:57,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:46:57,912 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 10 states. [2019-10-14 21:46:58,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:58,067 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2019-10-14 21:46:58,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:46:58,071 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-10-14 21:46:58,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:58,072 INFO L225 Difference]: With dead ends: 61 [2019-10-14 21:46:58,073 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 21:46:58,073 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:46:58,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 21:46:58,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2019-10-14 21:46:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 21:46:58,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-10-14 21:46:58,080 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2019-10-14 21:46:58,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:58,080 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-10-14 21:46:58,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:46:58,080 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-10-14 21:46:58,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:46:58,081 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:58,081 INFO L380 BasicCegarLoop]: trace histogram [8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:58,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:58,282 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:58,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:58,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1633268026, now seen corresponding path program 6 times [2019-10-14 21:46:58,284 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:58,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469753967] [2019-10-14 21:46:58,285 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:58,285 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:58,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:58,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:46:58,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469753967] [2019-10-14 21:46:58,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452096769] [2019-10-14 21:46:58,380 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:58,482 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 21:46:58,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:58,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:46:58,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:46:58,497 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:58,498 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:46:58,498 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388630606] [2019-10-14 21:46:58,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:46:58,498 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:58,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:46:58,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:46:58,499 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2019-10-14 21:46:58,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:58,623 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2019-10-14 21:46:58,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:46:58,624 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2019-10-14 21:46:58,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:58,625 INFO L225 Difference]: With dead ends: 65 [2019-10-14 21:46:58,625 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 21:46:58,625 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:46:58,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 21:46:58,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2019-10-14 21:46:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:46:58,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-10-14 21:46:58,632 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2019-10-14 21:46:58,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:58,632 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-10-14 21:46:58,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:46:58,633 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-10-14 21:46:58,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:46:58,633 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:58,634 INFO L380 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:58,834 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:58,835 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:58,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:58,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1209562039, now seen corresponding path program 7 times [2019-10-14 21:46:58,836 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:58,836 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256877328] [2019-10-14 21:46:58,836 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:58,836 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:58,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,959 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:46:58,960 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256877328] [2019-10-14 21:46:58,960 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89424454] [2019-10-14 21:46:58,960 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:46:59,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-14 21:46:59,077 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:59,077 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2019-10-14 21:46:59,077 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057139669] [2019-10-14 21:46:59,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:46:59,078 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:59,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:46:59,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=151, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:46:59,079 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 17 states. [2019-10-14 21:46:59,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:59,409 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2019-10-14 21:46:59,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:46:59,409 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2019-10-14 21:46:59,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:59,411 INFO L225 Difference]: With dead ends: 83 [2019-10-14 21:46:59,411 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 21:46:59,412 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=151, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:46:59,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 21:46:59,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 40. [2019-10-14 21:46:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:46:59,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2019-10-14 21:46:59,419 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 30 [2019-10-14 21:46:59,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:59,419 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2019-10-14 21:46:59,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:46:59,419 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2019-10-14 21:46:59,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:46:59,420 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:59,420 INFO L380 BasicCegarLoop]: trace histogram [13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:59,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:59,636 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:59,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:59,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1251926602, now seen corresponding path program 8 times [2019-10-14 21:46:59,637 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:59,638 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819410602] [2019-10-14 21:46:59,638 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-14 21:46:59,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819410602] [2019-10-14 21:46:59,798 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550958245] [2019-10-14 21:46:59,798 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:59,856 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:59,856 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:59,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:46:59,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:46:59,938 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:59,938 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 20 [2019-10-14 21:46:59,938 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293534279] [2019-10-14 21:46:59,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:46:59,939 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:59,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:46:59,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=208, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:46:59,939 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 20 states. [2019-10-14 21:47:00,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:00,177 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2019-10-14 21:47:00,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:47:00,178 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2019-10-14 21:47:00,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:00,180 INFO L225 Difference]: With dead ends: 91 [2019-10-14 21:47:00,180 INFO L226 Difference]: Without dead ends: 71 [2019-10-14 21:47:00,181 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=208, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:47:00,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-14 21:47:00,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 44. [2019-10-14 21:47:00,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:47:00,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2019-10-14 21:47:00,193 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 36 [2019-10-14 21:47:00,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:00,193 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2019-10-14 21:47:00,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:47:00,193 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2019-10-14 21:47:00,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:47:00,196 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:00,196 INFO L380 BasicCegarLoop]: trace histogram [16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:00,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:00,398 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:00,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:00,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1090835945, now seen corresponding path program 9 times [2019-10-14 21:47:00,399 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:00,400 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115283967] [2019-10-14 21:47:00,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:00,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:00,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-10-14 21:47:00,527 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115283967] [2019-10-14 21:47:00,527 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638467015] [2019-10-14 21:47:00,527 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:01,069 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:47:01,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:01,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:47:01,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-10-14 21:47:01,096 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:01,096 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:47:01,096 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15604185] [2019-10-14 21:47:01,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:47:01,097 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:01,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:47:01,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:01,098 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 14 states. [2019-10-14 21:47:01,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:01,306 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2019-10-14 21:47:01,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:47:01,308 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2019-10-14 21:47:01,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:01,309 INFO L225 Difference]: With dead ends: 85 [2019-10-14 21:47:01,309 INFO L226 Difference]: Without dead ends: 75 [2019-10-14 21:47:01,309 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:01,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-14 21:47:01,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2019-10-14 21:47:01,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 21:47:01,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2019-10-14 21:47:01,317 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 40 [2019-10-14 21:47:01,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:01,317 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2019-10-14 21:47:01,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:47:01,318 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2019-10-14 21:47:01,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 21:47:01,318 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:01,319 INFO L380 BasicCegarLoop]: trace histogram [16, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:01,523 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:01,524 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:01,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:01,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1633282438, now seen corresponding path program 10 times [2019-10-14 21:47:01,525 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:01,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492198228] [2019-10-14 21:47:01,526 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:01,526 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:01,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-10-14 21:47:01,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492198228] [2019-10-14 21:47:01,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832293063] [2019-10-14 21:47:01,649 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 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 21:47:01,710 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:01,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:01,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:47:01,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:47:01,833 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:01,834 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 24 [2019-10-14 21:47:01,834 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704631276] [2019-10-14 21:47:01,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:47:01,835 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:01,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:47:01,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=298, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:47:01,836 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 24 states. [2019-10-14 21:47:02,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:02,133 INFO L93 Difference]: Finished difference Result 105 states and 124 transitions. [2019-10-14 21:47:02,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:47:02,134 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 41 [2019-10-14 21:47:02,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:02,136 INFO L225 Difference]: With dead ends: 105 [2019-10-14 21:47:02,136 INFO L226 Difference]: Without dead ends: 83 [2019-10-14 21:47:02,137 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=254, Invalid=298, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:47:02,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-14 21:47:02,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 50. [2019-10-14 21:47:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 21:47:02,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-10-14 21:47:02,147 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 41 [2019-10-14 21:47:02,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:02,148 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-10-14 21:47:02,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:47:02,148 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-10-14 21:47:02,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 21:47:02,149 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:02,150 INFO L380 BasicCegarLoop]: trace histogram [20, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:02,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:02,353 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:02,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:02,354 INFO L82 PathProgramCache]: Analyzing trace with hash 128958601, now seen corresponding path program 11 times [2019-10-14 21:47:02,354 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:02,354 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237988831] [2019-10-14 21:47:02,354 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:02,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:02,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:02,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:02,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-14 21:47:02,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237988831] [2019-10-14 21:47:02,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51870852] [2019-10-14 21:47:02,543 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 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 21:47:17,564 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-10-14 21:47:17,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:17,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:47:17,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-14 21:47:17,728 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:17,728 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 27 [2019-10-14 21:47:17,728 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613130070] [2019-10-14 21:47:17,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:47:17,729 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:17,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:47:17,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=376, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:47:17,730 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 27 states. [2019-10-14 21:47:17,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:17,975 INFO L93 Difference]: Finished difference Result 113 states and 132 transitions. [2019-10-14 21:47:17,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:47:17,975 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 46 [2019-10-14 21:47:17,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:17,976 INFO L225 Difference]: With dead ends: 113 [2019-10-14 21:47:17,976 INFO L226 Difference]: Without dead ends: 90 [2019-10-14 21:47:17,977 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=326, Invalid=376, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:47:17,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-14 21:47:17,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 54. [2019-10-14 21:47:17,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 21:47:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2019-10-14 21:47:17,985 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 46 [2019-10-14 21:47:17,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:17,985 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2019-10-14 21:47:17,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:47:17,985 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2019-10-14 21:47:17,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 21:47:17,986 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:17,987 INFO L380 BasicCegarLoop]: trace histogram [23, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:18,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:18,188 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:18,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:18,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1673837942, now seen corresponding path program 12 times [2019-10-14 21:47:18,188 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:18,189 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359572085] [2019-10-14 21:47:18,189 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:18,189 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:18,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-10-14 21:47:18,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359572085] [2019-10-14 21:47:18,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309382105] [2019-10-14 21:47:18,357 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 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