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_minInArray_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:46:48,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:46:48,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:46:48,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:46:48,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:46:48,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:46:48,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:46:48,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:46:48,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:46:48,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:46:48,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:46:48,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:46:48,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:46:48,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:46:48,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:46:48,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:46:48,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:46:48,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:46:48,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:46:48,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:46:48,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:46:48,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:46:48,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:46:48,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:46:48,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:46:48,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:46:48,267 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:46:48,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:46:48,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:46:48,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:46:48,274 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:46:48,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:46:48,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:46:48,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:46:48,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:46:48,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:46:48,284 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 17:46:48,301 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:46:48,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:46:48,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:46:48,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:46:48,303 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:46:48,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:46:48,304 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:46:48,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:46:48,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:46:48,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:46:48,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:46:48,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:46:48,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:46:48,305 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:46:48,305 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:46:48,306 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:46:48,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:46:48,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:46:48,306 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:46:48,306 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:46:48,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:46:48,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:46:48,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:46:48,307 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:46:48,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:46:48,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:46:48,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:46:48,308 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:46:48,308 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:46:48,609 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:46:48,630 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:46:48,634 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:46:48,635 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:46:48,636 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:46:48,637 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_minInArray_ground-1.i [2019-10-13 17:46:48,718 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a73950b1/a7ad6c5878184a25bdfae7f62ade89e9/FLAGff0dbfb38 [2019-10-13 17:46:49,189 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:46:49,191 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_minInArray_ground-1.i [2019-10-13 17:46:49,198 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a73950b1/a7ad6c5878184a25bdfae7f62ade89e9/FLAGff0dbfb38 [2019-10-13 17:46:49,550 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a73950b1/a7ad6c5878184a25bdfae7f62ade89e9 [2019-10-13 17:46:49,560 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:46:49,562 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:46:49,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:46:49,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:46:49,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:46:49,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:46:49" (1/1) ... [2019-10-13 17:46:49,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eb1ed1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:49, skipping insertion in model container [2019-10-13 17:46:49,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:46:49" (1/1) ... [2019-10-13 17:46:49,579 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:46:49,598 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:46:49,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:46:49,773 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:46:49,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:46:49,819 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:46:49,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:49 WrapperNode [2019-10-13 17:46:49,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:46:49,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:46:49,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:46:49,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:46:49,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:49" (1/1) ... [2019-10-13 17:46:49,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:49" (1/1) ... [2019-10-13 17:46:49,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:49" (1/1) ... [2019-10-13 17:46:49,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:49" (1/1) ... [2019-10-13 17:46:49,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:49" (1/1) ... [2019-10-13 17:46:49,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:49" (1/1) ... [2019-10-13 17:46:49,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:49" (1/1) ... [2019-10-13 17:46:49,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:46:49,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:46:49,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:46:49,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:46:49,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:46:50,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:46:50,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:46:50,022 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:46:50,022 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:46:50,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:46:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:46:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:46:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:46:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:46:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:46:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:46:50,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:46:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:46:50,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:46:50,322 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:46:50,323 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 17:46:50,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:46:50 BoogieIcfgContainer [2019-10-13 17:46:50,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:46:50,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:46:50,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:46:50,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:46:50,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:46:49" (1/3) ... [2019-10-13 17:46:50,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18505b6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:46:50, skipping insertion in model container [2019-10-13 17:46:50,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:49" (2/3) ... [2019-10-13 17:46:50,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18505b6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:46:50, skipping insertion in model container [2019-10-13 17:46:50,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:46:50" (3/3) ... [2019-10-13 17:46:50,344 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-1.i [2019-10-13 17:46:50,357 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:46:50,364 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:46:50,375 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:46:50,399 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:46:50,399 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:46:50,399 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:46:50,399 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:46:50,399 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:46:50,399 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:46:50,399 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:46:50,400 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:46:50,417 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-13 17:46:50,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 17:46:50,423 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:50,424 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:50,426 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:50,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:50,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1241254978, now seen corresponding path program 1 times [2019-10-13 17:46:50,439 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:50,440 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753174890] [2019-10-13 17:46:50,440 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:50,440 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:50,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:46:50,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753174890] [2019-10-13 17:46:50,611 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:46:50,612 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:46:50,612 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126943870] [2019-10-13 17:46:50,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:46:50,622 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:50,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:46:50,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:46:50,641 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-10-13 17:46:50,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:50,749 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2019-10-13 17:46:50,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:46:50,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-13 17:46:50,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:50,759 INFO L225 Difference]: With dead ends: 48 [2019-10-13 17:46:50,760 INFO L226 Difference]: Without dead ends: 23 [2019-10-13 17:46:50,764 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:46:50,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-13 17:46:50,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-13 17:46:50,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-13 17:46:50,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-10-13 17:46:50,807 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2019-10-13 17:46:50,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:50,808 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-10-13 17:46:50,808 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:46:50,808 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-10-13 17:46:50,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 17:46:50,809 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:50,810 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:50,810 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:50,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:50,811 INFO L82 PathProgramCache]: Analyzing trace with hash -159068691, now seen corresponding path program 1 times [2019-10-13 17:46:50,811 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:50,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001433685] [2019-10-13 17:46:50,812 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:50,812 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:50,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:50,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:46:50,885 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001433685] [2019-10-13 17:46:50,885 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:46:50,885 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:46:50,886 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162629136] [2019-10-13 17:46:50,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:46:50,888 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:50,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:46:50,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:46:50,889 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2019-10-13 17:46:50,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:50,990 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2019-10-13 17:46:50,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:46:50,990 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-13 17:46:50,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:50,992 INFO L225 Difference]: With dead ends: 40 [2019-10-13 17:46:50,992 INFO L226 Difference]: Without dead ends: 25 [2019-10-13 17:46:50,993 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:46:50,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-13 17:46:50,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-10-13 17:46:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-13 17:46:51,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-10-13 17:46:51,001 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2019-10-13 17:46:51,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:51,001 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-10-13 17:46:51,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:46:51,002 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-10-13 17:46:51,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 17:46:51,003 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:51,003 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:51,003 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:51,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:51,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1675123339, now seen corresponding path program 1 times [2019-10-13 17:46:51,004 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:51,005 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606240054] [2019-10-13 17:46:51,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:51,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:51,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:46:51,104 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606240054] [2019-10-13 17:46:51,104 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:46:51,111 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:46:51,111 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915596676] [2019-10-13 17:46:51,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:46:51,112 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:51,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:46:51,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:46:51,113 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2019-10-13 17:46:51,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:51,204 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-10-13 17:46:51,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:46:51,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-13 17:46:51,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:51,205 INFO L225 Difference]: With dead ends: 38 [2019-10-13 17:46:51,206 INFO L226 Difference]: Without dead ends: 27 [2019-10-13 17:46:51,206 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:46:51,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-13 17:46:51,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2019-10-13 17:46:51,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-13 17:46:51,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-13 17:46:51,213 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2019-10-13 17:46:51,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:51,213 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-13 17:46:51,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:46:51,213 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-13 17:46:51,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:46:51,214 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:51,214 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:51,215 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:51,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:51,215 INFO L82 PathProgramCache]: Analyzing trace with hash 99818017, now seen corresponding path program 1 times [2019-10-13 17:46:51,215 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:51,216 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561403086] [2019-10-13 17:46:51,216 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:51,216 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:51,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:46:51,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561403086] [2019-10-13 17:46:51,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325714901] [2019-10-13 17:46:51,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:51,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:46:51,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:46:51,380 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:51,380 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-13 17:46:51,381 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972356477] [2019-10-13 17:46:51,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:46:51,382 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:51,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:46:51,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:46:51,382 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2019-10-13 17:46:51,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:51,487 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-10-13 17:46:51,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:46:51,488 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-13 17:46:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:51,489 INFO L225 Difference]: With dead ends: 44 [2019-10-13 17:46:51,489 INFO L226 Difference]: Without dead ends: 28 [2019-10-13 17:46:51,490 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:46:51,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-13 17:46:51,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-13 17:46:51,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 17:46:51,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-13 17:46:51,497 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 20 [2019-10-13 17:46:51,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:51,497 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-13 17:46:51,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:46:51,497 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-13 17:46:51,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 17:46:51,499 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:51,499 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:51,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:51,704 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:51,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:51,705 INFO L82 PathProgramCache]: Analyzing trace with hash -392904637, now seen corresponding path program 2 times [2019-10-13 17:46:51,706 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:51,706 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581706834] [2019-10-13 17:46:51,706 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:51,706 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:51,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:46:51,832 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581706834] [2019-10-13 17:46:51,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710339901] [2019-10-13 17:46:51,833 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:51,885 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:46:51,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:51,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:46:51,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:46:51,912 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:51,912 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 17:46:51,914 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923585302] [2019-10-13 17:46:51,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:46:51,915 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:51,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:46:51,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:46:51,916 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2019-10-13 17:46:52,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:52,002 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2019-10-13 17:46:52,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:46:52,004 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2019-10-13 17:46:52,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:52,004 INFO L225 Difference]: With dead ends: 46 [2019-10-13 17:46:52,005 INFO L226 Difference]: Without dead ends: 30 [2019-10-13 17:46:52,009 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:46:52,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-13 17:46:52,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-13 17:46:52,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 17:46:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-10-13 17:46:52,019 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2019-10-13 17:46:52,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:52,020 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-10-13 17:46:52,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:46:52,021 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-10-13 17:46:52,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 17:46:52,022 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:52,023 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:52,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:52,224 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:52,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1452972571, now seen corresponding path program 3 times [2019-10-13 17:46:52,225 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:52,225 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826274338] [2019-10-13 17:46:52,226 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:52,226 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:52,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:46:52,350 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826274338] [2019-10-13 17:46:52,350 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530691865] [2019-10-13 17:46:52,350 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:52,396 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 17:46:52,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:52,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:46:52,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:46:52,435 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:52,435 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-13 17:46:52,435 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019682882] [2019-10-13 17:46:52,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:46:52,437 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:52,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:46:52,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:46:52,438 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2019-10-13 17:46:52,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:52,563 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2019-10-13 17:46:52,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:46:52,563 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-10-13 17:46:52,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:52,566 INFO L225 Difference]: With dead ends: 53 [2019-10-13 17:46:52,567 INFO L226 Difference]: Without dead ends: 37 [2019-10-13 17:46:52,568 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:46:52,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-13 17:46:52,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2019-10-13 17:46:52,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-13 17:46:52,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-10-13 17:46:52,578 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 24 [2019-10-13 17:46:52,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:52,578 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-10-13 17:46:52,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:46:52,579 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-10-13 17:46:52,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-13 17:46:52,580 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:52,583 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:52,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:52,787 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:52,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:52,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1548834779, now seen corresponding path program 4 times [2019-10-13 17:46:52,787 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:52,787 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066359037] [2019-10-13 17:46:52,788 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:52,788 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:52,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:52,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:52,892 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:46:52,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066359037] [2019-10-13 17:46:52,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771368258] [2019-10-13 17:46:52,893 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 [2019-10-13 17:46:52,944 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:46:52,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:52,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:46:52,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:46:52,963 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:52,970 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-13 17:46:52,971 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897708695] [2019-10-13 17:46:52,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:46:52,971 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:52,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:46:52,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:46:52,972 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2019-10-13 17:46:53,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:53,059 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2019-10-13 17:46:53,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:46:53,059 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2019-10-13 17:46:53,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:53,060 INFO L225 Difference]: With dead ends: 56 [2019-10-13 17:46:53,060 INFO L226 Difference]: Without dead ends: 37 [2019-10-13 17:46:53,061 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:46:53,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-13 17:46:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-10-13 17:46:53,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-13 17:46:53,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-13 17:46:53,067 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2019-10-13 17:46:53,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:53,067 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-13 17:46:53,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:46:53,067 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-13 17:46:53,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 17:46:53,068 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:53,068 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:53,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:53,277 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:53,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:53,278 INFO L82 PathProgramCache]: Analyzing trace with hash 927516739, now seen corresponding path program 5 times [2019-10-13 17:46:53,278 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:53,279 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627937104] [2019-10-13 17:46:53,279 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:53,279 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:53,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:46:53,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627937104] [2019-10-13 17:46:53,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124564618] [2019-10-13 17:46:53,382 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 [2019-10-13 17:46:53,440 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-13 17:46:53,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:53,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:46:53,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 17:46:53,481 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:53,481 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 17:46:53,482 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800963181] [2019-10-13 17:46:53,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:46:53,483 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:53,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:46:53,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:46:53,483 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 12 states. [2019-10-13 17:46:53,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:53,591 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2019-10-13 17:46:53,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:46:53,596 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2019-10-13 17:46:53,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:53,596 INFO L225 Difference]: With dead ends: 63 [2019-10-13 17:46:53,597 INFO L226 Difference]: Without dead ends: 44 [2019-10-13 17:46:53,597 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:46:53,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-13 17:46:53,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2019-10-13 17:46:53,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-13 17:46:53,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2019-10-13 17:46:53,604 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 31 [2019-10-13 17:46:53,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:53,604 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2019-10-13 17:46:53,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:46:53,605 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2019-10-13 17:46:53,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-13 17:46:53,606 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:53,606 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:53,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:53,811 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:53,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:53,811 INFO L82 PathProgramCache]: Analyzing trace with hash -649169909, now seen corresponding path program 6 times [2019-10-13 17:46:53,812 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:53,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529794694] [2019-10-13 17:46:53,813 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:53,813 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:53,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:46:53,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529794694] [2019-10-13 17:46:53,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106192051] [2019-10-13 17:46:53,974 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 [2019-10-13 17:46:54,040 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 17:46:54,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:54,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:46:54,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:54,087 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 17:46:54,089 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:54,089 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-10-13 17:46:54,089 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498765917] [2019-10-13 17:46:54,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:46:54,090 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:54,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:46:54,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:46:54,091 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 14 states. [2019-10-13 17:46:54,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:54,233 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2019-10-13 17:46:54,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:46:54,234 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-10-13 17:46:54,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:54,235 INFO L225 Difference]: With dead ends: 71 [2019-10-13 17:46:54,235 INFO L226 Difference]: Without dead ends: 49 [2019-10-13 17:46:54,236 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:46:54,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-13 17:46:54,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2019-10-13 17:46:54,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-13 17:46:54,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2019-10-13 17:46:54,242 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 36 [2019-10-13 17:46:54,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:54,243 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2019-10-13 17:46:54,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:46:54,243 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2019-10-13 17:46:54,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 17:46:54,244 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:54,244 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:54,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:54,456 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:54,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:54,456 INFO L82 PathProgramCache]: Analyzing trace with hash -2070699201, now seen corresponding path program 7 times [2019-10-13 17:46:54,456 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:54,457 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118087724] [2019-10-13 17:46:54,457 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:54,457 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:54,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:54,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 17:46:54,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118087724] [2019-10-13 17:46:54,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796978237] [2019-10-13 17:46:54,573 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 [2019-10-13 17:46:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:54,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:46:54,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 17:46:54,644 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:54,644 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 17:46:54,644 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318242892] [2019-10-13 17:46:54,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:46:54,645 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:54,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:46:54,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:46:54,646 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 12 states. [2019-10-13 17:46:54,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:54,763 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2019-10-13 17:46:54,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:46:54,764 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2019-10-13 17:46:54,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:54,765 INFO L225 Difference]: With dead ends: 74 [2019-10-13 17:46:54,765 INFO L226 Difference]: Without dead ends: 49 [2019-10-13 17:46:54,766 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:46:54,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-13 17:46:54,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-10-13 17:46:54,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-13 17:46:54,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2019-10-13 17:46:54,776 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 41 [2019-10-13 17:46:54,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:54,776 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2019-10-13 17:46:54,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:46:54,778 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2019-10-13 17:46:54,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-13 17:46:54,779 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:54,779 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:54,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:54,986 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:54,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:54,986 INFO L82 PathProgramCache]: Analyzing trace with hash -715618723, now seen corresponding path program 8 times [2019-10-13 17:46:54,987 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:54,987 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230870879] [2019-10-13 17:46:54,988 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:54,988 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:54,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 17:46:55,094 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230870879] [2019-10-13 17:46:55,094 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145101045] [2019-10-13 17:46:55,094 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 [2019-10-13 17:46:55,148 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:46:55,148 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:55,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:46:55,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 17:46:55,190 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:55,190 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 17:46:55,190 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120573164] [2019-10-13 17:46:55,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:46:55,191 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:55,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:46:55,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:46:55,192 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 13 states. [2019-10-13 17:46:55,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:55,315 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2019-10-13 17:46:55,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:46:55,315 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2019-10-13 17:46:55,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:55,316 INFO L225 Difference]: With dead ends: 76 [2019-10-13 17:46:55,316 INFO L226 Difference]: Without dead ends: 51 [2019-10-13 17:46:55,317 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:46:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-13 17:46:55,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-10-13 17:46:55,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-13 17:46:55,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2019-10-13 17:46:55,323 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 43 [2019-10-13 17:46:55,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:55,324 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2019-10-13 17:46:55,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:46:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2019-10-13 17:46:55,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-13 17:46:55,326 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:55,326 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:55,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:55,536 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:55,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:55,537 INFO L82 PathProgramCache]: Analyzing trace with hash 141629947, now seen corresponding path program 9 times [2019-10-13 17:46:55,537 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:55,537 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603700731] [2019-10-13 17:46:55,537 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:55,538 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:55,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 17:46:55,668 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603700731] [2019-10-13 17:46:55,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386033217] [2019-10-13 17:46:55,669 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 [2019-10-13 17:46:55,714 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-13 17:46:55,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:55,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:46:55,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-13 17:46:55,810 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:55,810 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2019-10-13 17:46:55,811 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637779576] [2019-10-13 17:46:55,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:46:55,811 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:55,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:46:55,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:46:55,812 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 18 states. [2019-10-13 17:46:55,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:55,926 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2019-10-13 17:46:55,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:46:55,927 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2019-10-13 17:46:55,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:55,928 INFO L225 Difference]: With dead ends: 83 [2019-10-13 17:46:55,928 INFO L226 Difference]: Without dead ends: 58 [2019-10-13 17:46:55,930 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:46:55,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-13 17:46:55,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2019-10-13 17:46:55,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-13 17:46:55,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2019-10-13 17:46:55,941 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 45 [2019-10-13 17:46:55,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:55,942 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2019-10-13 17:46:55,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:46:55,942 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2019-10-13 17:46:55,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-13 17:46:55,943 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:55,943 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:56,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:56,154 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:56,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:56,155 INFO L82 PathProgramCache]: Analyzing trace with hash 860480467, now seen corresponding path program 10 times [2019-10-13 17:46:56,156 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:56,156 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660918396] [2019-10-13 17:46:56,156 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:56,156 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:56,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 17:46:56,278 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660918396] [2019-10-13 17:46:56,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955579295] [2019-10-13 17:46:56,279 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 [2019-10-13 17:46:56,335 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:46:56,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:56,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:46:56,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 17:46:56,363 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:56,364 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-13 17:46:56,364 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831306465] [2019-10-13 17:46:56,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 17:46:56,364 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:56,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 17:46:56,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:46:56,365 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 15 states. [2019-10-13 17:46:56,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:56,496 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2019-10-13 17:46:56,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:46:56,497 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2019-10-13 17:46:56,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:56,498 INFO L225 Difference]: With dead ends: 86 [2019-10-13 17:46:56,498 INFO L226 Difference]: Without dead ends: 58 [2019-10-13 17:46:56,499 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:46:56,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-13 17:46:56,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-10-13 17:46:56,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-13 17:46:56,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2019-10-13 17:46:56,505 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 50 [2019-10-13 17:46:56,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:56,505 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2019-10-13 17:46:56,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 17:46:56,506 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2019-10-13 17:46:56,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 17:46:56,507 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:56,507 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:56,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:56,711 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:56,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:56,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1055892085, now seen corresponding path program 11 times [2019-10-13 17:46:56,712 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:56,712 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614919859] [2019-10-13 17:46:56,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:56,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:56,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 17:46:56,896 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614919859] [2019-10-13 17:46:56,897 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949282965] [2019-10-13 17:46:56,897 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 [2019-10-13 17:46:56,996 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-13 17:46:56,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:56,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 17:46:56,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 17:46:57,019 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:57,019 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-13 17:46:57,020 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398029793] [2019-10-13 17:46:57,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 17:46:57,020 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:57,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 17:46:57,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:46:57,021 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 16 states. [2019-10-13 17:46:57,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:57,158 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2019-10-13 17:46:57,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:46:57,159 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2019-10-13 17:46:57,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:57,160 INFO L225 Difference]: With dead ends: 88 [2019-10-13 17:46:57,160 INFO L226 Difference]: Without dead ends: 60 [2019-10-13 17:46:57,161 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:46:57,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-13 17:46:57,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-10-13 17:46:57,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-13 17:46:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2019-10-13 17:46:57,167 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 52 [2019-10-13 17:46:57,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:57,168 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2019-10-13 17:46:57,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 17:46:57,168 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2019-10-13 17:46:57,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-13 17:46:57,169 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:57,169 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:57,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:57,376 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:57,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:57,377 INFO L82 PathProgramCache]: Analyzing trace with hash -132104041, now seen corresponding path program 12 times [2019-10-13 17:46:57,378 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:57,378 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978621482] [2019-10-13 17:46:57,378 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:57,379 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:57,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 17:46:57,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978621482] [2019-10-13 17:46:57,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629654153] [2019-10-13 17:46:57,574 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 [2019-10-13 17:46:57,747 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-13 17:46:57,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:57,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:46:57,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-13 17:46:57,879 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:57,880 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2019-10-13 17:46:57,880 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370173234] [2019-10-13 17:46:57,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 17:46:57,882 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:57,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 17:46:57,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:46:57,883 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 22 states. [2019-10-13 17:46:58,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:58,089 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2019-10-13 17:46:58,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 17:46:58,090 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2019-10-13 17:46:58,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:58,091 INFO L225 Difference]: With dead ends: 95 [2019-10-13 17:46:58,091 INFO L226 Difference]: Without dead ends: 67 [2019-10-13 17:46:58,096 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:46:58,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-13 17:46:58,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2019-10-13 17:46:58,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-13 17:46:58,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2019-10-13 17:46:58,107 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 54 [2019-10-13 17:46:58,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:58,108 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2019-10-13 17:46:58,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 17:46:58,108 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2019-10-13 17:46:58,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-13 17:46:58,109 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:58,112 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:58,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:58,313 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:58,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:58,314 INFO L82 PathProgramCache]: Analyzing trace with hash -43659341, now seen corresponding path program 13 times [2019-10-13 17:46:58,314 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:58,315 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942123218] [2019-10-13 17:46:58,315 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:58,315 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:58,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:58,536 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 17:46:58,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942123218] [2019-10-13 17:46:58,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675992803] [2019-10-13 17:46:58,537 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:58,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:46:58,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 17:46:58,658 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:58,658 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-13 17:46:58,658 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504899415] [2019-10-13 17:46:58,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:46:58,659 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:58,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:46:58,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:46:58,660 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 18 states. [2019-10-13 17:46:58,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:58,758 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2019-10-13 17:46:58,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:46:58,759 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2019-10-13 17:46:58,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:58,760 INFO L225 Difference]: With dead ends: 98 [2019-10-13 17:46:58,760 INFO L226 Difference]: Without dead ends: 67 [2019-10-13 17:46:58,761 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:46:58,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-13 17:46:58,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-10-13 17:46:58,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-13 17:46:58,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2019-10-13 17:46:58,777 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 59 [2019-10-13 17:46:58,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:58,777 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2019-10-13 17:46:58,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:46:58,778 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2019-10-13 17:46:58,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-13 17:46:58,778 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:58,779 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:58,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:58,992 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:58,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:58,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1406101329, now seen corresponding path program 14 times [2019-10-13 17:46:58,993 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:58,994 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708553808] [2019-10-13 17:46:58,994 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:58,994 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:58,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:59,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 17:46:59,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708553808] [2019-10-13 17:46:59,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687963638] [2019-10-13 17:46:59,183 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:59,242 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:46:59,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:59,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 17:46:59,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:59,266 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 17:46:59,266 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:59,266 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-13 17:46:59,267 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338928269] [2019-10-13 17:46:59,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:46:59,267 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:59,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:46:59,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:46:59,268 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 19 states. [2019-10-13 17:46:59,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:59,416 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2019-10-13 17:46:59,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:46:59,417 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2019-10-13 17:46:59,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:59,418 INFO L225 Difference]: With dead ends: 100 [2019-10-13 17:46:59,418 INFO L226 Difference]: Without dead ends: 69 [2019-10-13 17:46:59,418 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:46:59,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-13 17:46:59,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-10-13 17:46:59,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-13 17:46:59,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2019-10-13 17:46:59,423 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 61 [2019-10-13 17:46:59,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:59,424 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2019-10-13 17:46:59,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:46:59,424 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2019-10-13 17:46:59,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 17:46:59,425 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:59,425 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:59,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:59,629 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:59,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:59,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1238266001, now seen corresponding path program 15 times [2019-10-13 17:46:59,630 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:59,631 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080227108] [2019-10-13 17:46:59,631 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:59,631 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:59,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:59,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 17:46:59,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080227108] [2019-10-13 17:46:59,822 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037507297] [2019-10-13 17:46:59,822 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:59,895 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-13 17:46:59,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:59,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:46:59,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-13 17:47:00,035 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:00,035 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 26 [2019-10-13 17:47:00,035 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34814897] [2019-10-13 17:47:00,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-13 17:47:00,036 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:00,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-13 17:47:00,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:47:00,037 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 26 states. [2019-10-13 17:47:00,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:00,208 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2019-10-13 17:47:00,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-13 17:47:00,209 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2019-10-13 17:47:00,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:00,210 INFO L225 Difference]: With dead ends: 107 [2019-10-13 17:47:00,210 INFO L226 Difference]: Without dead ends: 76 [2019-10-13 17:47:00,211 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:47:00,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-13 17:47:00,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2019-10-13 17:47:00,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-13 17:47:00,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2019-10-13 17:47:00,223 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 63 [2019-10-13 17:47:00,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:00,224 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2019-10-13 17:47:00,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-13 17:47:00,224 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2019-10-13 17:47:00,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-13 17:47:00,227 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:00,228 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:00,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:00,428 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:00,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:00,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1089291615, now seen corresponding path program 16 times [2019-10-13 17:47:00,429 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:00,430 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24630373] [2019-10-13 17:47:00,430 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:00,430 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:00,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 17:47:00,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24630373] [2019-10-13 17:47:00,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954608076] [2019-10-13 17:47:00,693 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:00,757 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:47:00,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:00,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:47:00,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 17:47:00,784 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:00,784 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-13 17:47:00,784 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048376241] [2019-10-13 17:47:00,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:47:00,785 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:00,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:47:00,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:47:00,786 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 21 states. [2019-10-13 17:47:00,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:00,957 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2019-10-13 17:47:00,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:47:00,957 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2019-10-13 17:47:00,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:00,958 INFO L225 Difference]: With dead ends: 110 [2019-10-13 17:47:00,959 INFO L226 Difference]: Without dead ends: 76 [2019-10-13 17:47:00,959 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:47:00,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-13 17:47:00,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-10-13 17:47:00,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-13 17:47:00,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2019-10-13 17:47:00,965 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 68 [2019-10-13 17:47:00,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:00,965 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2019-10-13 17:47:00,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:47:00,965 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2019-10-13 17:47:00,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-13 17:47:00,966 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:00,966 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:01,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:01,171 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:01,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:01,172 INFO L82 PathProgramCache]: Analyzing trace with hash 665935745, now seen corresponding path program 17 times [2019-10-13 17:47:01,172 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:01,172 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768570618] [2019-10-13 17:47:01,172 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:01,173 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:01,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 17:47:01,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768570618] [2019-10-13 17:47:01,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167720382] [2019-10-13 17:47:01,419 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:01,635 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-13 17:47:01,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:01,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 17:47:01,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 17:47:01,685 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:01,685 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-10-13 17:47:01,685 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710247679] [2019-10-13 17:47:01,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 17:47:01,686 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:01,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 17:47:01,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:47:01,687 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand 22 states. [2019-10-13 17:47:01,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:01,795 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2019-10-13 17:47:01,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:47:01,795 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 70 [2019-10-13 17:47:01,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:01,796 INFO L225 Difference]: With dead ends: 112 [2019-10-13 17:47:01,796 INFO L226 Difference]: Without dead ends: 78 [2019-10-13 17:47:01,797 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:47:01,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-13 17:47:01,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-10-13 17:47:01,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-13 17:47:01,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2019-10-13 17:47:01,800 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 70 [2019-10-13 17:47:01,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:01,800 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2019-10-13 17:47:01,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 17:47:01,801 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2019-10-13 17:47:01,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-13 17:47:01,801 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:01,802 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:02,006 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:02,006 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:02,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:02,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1842837795, now seen corresponding path program 18 times [2019-10-13 17:47:02,007 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:02,007 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854817500] [2019-10-13 17:47:02,008 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:02,008 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:02,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 17:47:02,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854817500] [2019-10-13 17:47:02,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939108479] [2019-10-13 17:47:02,224 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:02,389 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-10-13 17:47:02,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:02,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:47:02,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-10-13 17:47:02,537 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:02,537 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 30 [2019-10-13 17:47:02,538 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72634013] [2019-10-13 17:47:02,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-13 17:47:02,538 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:02,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-13 17:47:02,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=614, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:47:02,539 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 30 states. [2019-10-13 17:47:02,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:02,826 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2019-10-13 17:47:02,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 17:47:02,826 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 72 [2019-10-13 17:47:02,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:02,827 INFO L225 Difference]: With dead ends: 119 [2019-10-13 17:47:02,828 INFO L226 Difference]: Without dead ends: 85 [2019-10-13 17:47:02,829 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=256, Invalid=614, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:47:02,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-13 17:47:02,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2019-10-13 17:47:02,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-13 17:47:02,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2019-10-13 17:47:02,833 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 72 [2019-10-13 17:47:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:02,833 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2019-10-13 17:47:02,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-13 17:47:02,834 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2019-10-13 17:47:02,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-13 17:47:02,834 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:02,835 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:03,046 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:03,046 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:03,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:03,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1263603673, now seen corresponding path program 19 times [2019-10-13 17:47:03,047 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:03,048 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55460312] [2019-10-13 17:47:03,048 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:03,048 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:03,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:03,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-13 17:47:03,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55460312] [2019-10-13 17:47:03,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9469415] [2019-10-13 17:47:03,327 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:03,390 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 17:47:03,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-13 17:47:03,408 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:03,409 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-13 17:47:03,409 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640914405] [2019-10-13 17:47:03,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 17:47:03,409 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:03,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 17:47:03,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:47:03,410 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand 24 states. [2019-10-13 17:47:03,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:03,539 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2019-10-13 17:47:03,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 17:47:03,542 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 77 [2019-10-13 17:47:03,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:03,543 INFO L225 Difference]: With dead ends: 122 [2019-10-13 17:47:03,543 INFO L226 Difference]: Without dead ends: 85 [2019-10-13 17:47:03,543 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:47:03,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-13 17:47:03,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2019-10-13 17:47:03,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-13 17:47:03,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2019-10-13 17:47:03,548 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 77 [2019-10-13 17:47:03,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:03,548 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2019-10-13 17:47:03,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 17:47:03,548 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2019-10-13 17:47:03,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-13 17:47:03,549 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:03,549 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:03,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:03,754 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:03,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:03,754 INFO L82 PathProgramCache]: Analyzing trace with hash 296295493, now seen corresponding path program 20 times [2019-10-13 17:47:03,755 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:03,755 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881518773] [2019-10-13 17:47:03,755 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:03,755 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:03,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-13 17:47:04,060 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881518773] [2019-10-13 17:47:04,060 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449283021] [2019-10-13 17:47:04,060 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:04,129 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:04,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:04,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 17:47:04,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-13 17:47:04,151 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:04,151 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-13 17:47:04,151 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155427441] [2019-10-13 17:47:04,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 17:47:04,152 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:04,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 17:47:04,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:47:04,153 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 25 states. [2019-10-13 17:47:04,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:04,330 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2019-10-13 17:47:04,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 17:47:04,330 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 79 [2019-10-13 17:47:04,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:04,331 INFO L225 Difference]: With dead ends: 124 [2019-10-13 17:47:04,331 INFO L226 Difference]: Without dead ends: 87 [2019-10-13 17:47:04,332 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:47:04,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-13 17:47:04,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-10-13 17:47:04,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-13 17:47:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2019-10-13 17:47:04,337 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 79 [2019-10-13 17:47:04,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:04,337 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2019-10-13 17:47:04,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 17:47:04,337 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2019-10-13 17:47:04,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-13 17:47:04,339 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:04,339 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:04,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:04,543 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:04,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:04,543 INFO L82 PathProgramCache]: Analyzing trace with hash 415807715, now seen corresponding path program 21 times [2019-10-13 17:47:04,544 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:04,544 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648215879] [2019-10-13 17:47:04,544 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:04,544 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:04,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-13 17:47:04,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648215879] [2019-10-13 17:47:04,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832177103] [2019-10-13 17:47:04,856 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:04,936 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-13 17:47:04,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:04,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:47:04,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-10-13 17:47:05,121 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:05,121 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 11] total 34 [2019-10-13 17:47:05,122 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630221281] [2019-10-13 17:47:05,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-13 17:47:05,122 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:05,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-13 17:47:05,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 17:47:05,123 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand 34 states. [2019-10-13 17:47:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:05,320 INFO L93 Difference]: Finished difference Result 131 states and 154 transitions. [2019-10-13 17:47:05,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-13 17:47:05,320 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 81 [2019-10-13 17:47:05,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:05,321 INFO L225 Difference]: With dead ends: 131 [2019-10-13 17:47:05,321 INFO L226 Difference]: Without dead ends: 94 [2019-10-13 17:47:05,323 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 17:47:05,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-13 17:47:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2019-10-13 17:47:05,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-13 17:47:05,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2019-10-13 17:47:05,327 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 81 [2019-10-13 17:47:05,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:05,327 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2019-10-13 17:47:05,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-13 17:47:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2019-10-13 17:47:05,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-13 17:47:05,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:05,328 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:05,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:05,533 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:05,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:05,534 INFO L82 PathProgramCache]: Analyzing trace with hash -339373333, now seen corresponding path program 22 times [2019-10-13 17:47:05,534 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:05,534 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619874386] [2019-10-13 17:47:05,535 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:05,535 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:05,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-13 17:47:05,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619874386] [2019-10-13 17:47:05,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944685193] [2019-10-13 17:47:05,890 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:05,961 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:47:05,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:05,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-13 17:47:05,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-13 17:47:05,995 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:05,995 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-13 17:47:05,995 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648204072] [2019-10-13 17:47:05,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-13 17:47:05,995 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:05,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-13 17:47:05,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:47:05,996 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand 27 states. [2019-10-13 17:47:06,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:06,145 INFO L93 Difference]: Finished difference Result 134 states and 156 transitions. [2019-10-13 17:47:06,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-13 17:47:06,146 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 86 [2019-10-13 17:47:06,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:06,147 INFO L225 Difference]: With dead ends: 134 [2019-10-13 17:47:06,147 INFO L226 Difference]: Without dead ends: 94 [2019-10-13 17:47:06,148 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:47:06,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-13 17:47:06,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-10-13 17:47:06,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-13 17:47:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2019-10-13 17:47:06,154 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 86 [2019-10-13 17:47:06,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:06,154 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2019-10-13 17:47:06,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-13 17:47:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2019-10-13 17:47:06,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-13 17:47:06,155 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:06,155 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:06,359 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:06,359 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:06,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:06,360 INFO L82 PathProgramCache]: Analyzing trace with hash -937940851, now seen corresponding path program 23 times [2019-10-13 17:47:06,360 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:06,360 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831364102] [2019-10-13 17:47:06,360 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:06,361 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:06,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-13 17:47:06,729 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831364102] [2019-10-13 17:47:06,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135895227] [2019-10-13 17:47:06,730 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:07,133 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-10-13 17:47:07,134 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:07,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:47:07,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-10-13 17:47:07,306 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:07,307 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 12] total 37 [2019-10-13 17:47:07,307 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955895362] [2019-10-13 17:47:07,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-13 17:47:07,307 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:07,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-13 17:47:07,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 17:47:07,309 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand 37 states. [2019-10-13 17:47:07,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:07,637 INFO L93 Difference]: Finished difference Result 141 states and 166 transitions. [2019-10-13 17:47:07,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-13 17:47:07,638 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 88 [2019-10-13 17:47:07,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:07,639 INFO L225 Difference]: With dead ends: 141 [2019-10-13 17:47:07,639 INFO L226 Difference]: Without dead ends: 101 [2019-10-13 17:47:07,641 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 17:47:07,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-13 17:47:07,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2019-10-13 17:47:07,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-13 17:47:07,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 110 transitions. [2019-10-13 17:47:07,646 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 110 transitions. Word has length 88 [2019-10-13 17:47:07,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:07,646 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 110 transitions. [2019-10-13 17:47:07,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-13 17:47:07,647 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 110 transitions. [2019-10-13 17:47:07,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-13 17:47:07,647 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:07,648 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:07,853 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:07,853 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:07,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:07,854 INFO L82 PathProgramCache]: Analyzing trace with hash -2140334979, now seen corresponding path program 24 times [2019-10-13 17:47:07,854 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:07,854 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063947585] [2019-10-13 17:47:07,855 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:07,855 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:07,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-10-13 17:47:08,207 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063947585] [2019-10-13 17:47:08,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240304939] [2019-10-13 17:47:08,208 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:08,701 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-10-13 17:47:08,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:08,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:47:08,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-10-13 17:47:08,908 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:08,909 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 13] total 39 [2019-10-13 17:47:08,909 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127767813] [2019-10-13 17:47:08,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-13 17:47:08,909 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:08,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-13 17:47:08,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=1052, Unknown=0, NotChecked=0, Total=1482 [2019-10-13 17:47:08,910 INFO L87 Difference]: Start difference. First operand 98 states and 110 transitions. Second operand 39 states. [2019-10-13 17:47:09,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:09,232 INFO L93 Difference]: Finished difference Result 149 states and 176 transitions. [2019-10-13 17:47:09,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-13 17:47:09,232 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 93 [2019-10-13 17:47:09,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:09,233 INFO L225 Difference]: With dead ends: 149 [2019-10-13 17:47:09,234 INFO L226 Difference]: Without dead ends: 106 [2019-10-13 17:47:09,235 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=430, Invalid=1052, Unknown=0, NotChecked=0, Total=1482 [2019-10-13 17:47:09,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-13 17:47:09,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2019-10-13 17:47:09,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-13 17:47:09,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 116 transitions. [2019-10-13 17:47:09,239 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 116 transitions. Word has length 93 [2019-10-13 17:47:09,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:09,239 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 116 transitions. [2019-10-13 17:47:09,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-13 17:47:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 116 transitions. [2019-10-13 17:47:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 17:47:09,240 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:09,240 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:09,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:09,441 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:09,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:09,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2012952081, now seen corresponding path program 25 times [2019-10-13 17:47:09,442 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:09,442 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779413570] [2019-10-13 17:47:09,443 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:09,443 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:09,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-13 17:47:09,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779413570] [2019-10-13 17:47:09,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974122054] [2019-10-13 17:47:09,810 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:09,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-13 17:47:09,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-13 17:47:09,916 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:09,916 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-13 17:47:09,916 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929475339] [2019-10-13 17:47:09,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-13 17:47:09,917 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:09,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-13 17:47:09,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:47:09,918 INFO L87 Difference]: Start difference. First operand 103 states and 116 transitions. Second operand 30 states. [2019-10-13 17:47:10,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:10,121 INFO L93 Difference]: Finished difference Result 152 states and 178 transitions. [2019-10-13 17:47:10,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-13 17:47:10,121 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 98 [2019-10-13 17:47:10,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:10,123 INFO L225 Difference]: With dead ends: 152 [2019-10-13 17:47:10,123 INFO L226 Difference]: Without dead ends: 106 [2019-10-13 17:47:10,124 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:47:10,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-13 17:47:10,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2019-10-13 17:47:10,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-13 17:47:10,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2019-10-13 17:47:10,129 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 98 [2019-10-13 17:47:10,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:10,129 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2019-10-13 17:47:10,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-13 17:47:10,129 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2019-10-13 17:47:10,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-13 17:47:10,130 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:10,130 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:10,334 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:10,334 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:10,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:10,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1694472013, now seen corresponding path program 26 times [2019-10-13 17:47:10,335 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:10,335 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214467141] [2019-10-13 17:47:10,336 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:10,336 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:10,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-13 17:47:10,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214467141] [2019-10-13 17:47:10,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811957760] [2019-10-13 17:47:10,773 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:10,871 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:10,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:10,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-13 17:47:10,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-13 17:47:10,904 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:10,904 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-13 17:47:10,904 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013423455] [2019-10-13 17:47:10,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-13 17:47:10,905 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:10,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-13 17:47:10,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:47:10,906 INFO L87 Difference]: Start difference. First operand 105 states and 118 transitions. Second operand 31 states. [2019-10-13 17:47:11,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:11,046 INFO L93 Difference]: Finished difference Result 154 states and 180 transitions. [2019-10-13 17:47:11,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 17:47:11,047 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 100 [2019-10-13 17:47:11,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:11,048 INFO L225 Difference]: With dead ends: 154 [2019-10-13 17:47:11,048 INFO L226 Difference]: Without dead ends: 108 [2019-10-13 17:47:11,049 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:47:11,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-13 17:47:11,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-10-13 17:47:11,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-13 17:47:11,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 120 transitions. [2019-10-13 17:47:11,057 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 120 transitions. Word has length 100 [2019-10-13 17:47:11,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:11,057 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 120 transitions. [2019-10-13 17:47:11,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-13 17:47:11,057 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 120 transitions. [2019-10-13 17:47:11,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-13 17:47:11,058 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:11,058 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:11,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:11,263 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:11,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:11,264 INFO L82 PathProgramCache]: Analyzing trace with hash 293829333, now seen corresponding path program 27 times [2019-10-13 17:47:11,264 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:11,264 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388872775] [2019-10-13 17:47:11,265 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:11,265 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:11,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-13 17:47:11,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388872775] [2019-10-13 17:47:11,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165783712] [2019-10-13 17:47:11,704 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:11,831 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-13 17:47:11,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:11,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 17:47:11,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-10-13 17:47:12,043 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:12,043 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 14] total 43 [2019-10-13 17:47:12,043 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157545477] [2019-10-13 17:47:12,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-10-13 17:47:12,044 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:12,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-10-13 17:47:12,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=1279, Unknown=0, NotChecked=0, Total=1806 [2019-10-13 17:47:12,045 INFO L87 Difference]: Start difference. First operand 107 states and 120 transitions. Second operand 43 states. [2019-10-13 17:47:12,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:12,294 INFO L93 Difference]: Finished difference Result 161 states and 190 transitions. [2019-10-13 17:47:12,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-10-13 17:47:12,295 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 102 [2019-10-13 17:47:12,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:12,296 INFO L225 Difference]: With dead ends: 161 [2019-10-13 17:47:12,296 INFO L226 Difference]: Without dead ends: 115 [2019-10-13 17:47:12,297 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=527, Invalid=1279, Unknown=0, NotChecked=0, Total=1806 [2019-10-13 17:47:12,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-13 17:47:12,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2019-10-13 17:47:12,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-13 17:47:12,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2019-10-13 17:47:12,301 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 102 [2019-10-13 17:47:12,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:12,301 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2019-10-13 17:47:12,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-10-13 17:47:12,301 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2019-10-13 17:47:12,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-13 17:47:12,302 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:12,302 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:12,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:12,503 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:12,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:12,503 INFO L82 PathProgramCache]: Analyzing trace with hash 397578421, now seen corresponding path program 28 times [2019-10-13 17:47:12,504 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:12,504 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063141758] [2019-10-13 17:47:12,504 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:12,505 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:12,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-13 17:47:12,946 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063141758] [2019-10-13 17:47:12,946 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565962591] [2019-10-13 17:47:12,946 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:13,033 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:47:13,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:13,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-13 17:47:13,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-13 17:47:13,060 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:13,060 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-10-13 17:47:13,060 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721807919] [2019-10-13 17:47:13,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-13 17:47:13,061 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:13,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-13 17:47:13,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 17:47:13,062 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand 33 states. [2019-10-13 17:47:13,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:13,321 INFO L93 Difference]: Finished difference Result 164 states and 192 transitions. [2019-10-13 17:47:13,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-13 17:47:13,321 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 107 [2019-10-13 17:47:13,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:13,323 INFO L225 Difference]: With dead ends: 164 [2019-10-13 17:47:13,323 INFO L226 Difference]: Without dead ends: 115 [2019-10-13 17:47:13,324 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 17:47:13,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-13 17:47:13,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-10-13 17:47:13,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-10-13 17:47:13,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2019-10-13 17:47:13,328 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 107 [2019-10-13 17:47:13,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:13,328 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2019-10-13 17:47:13,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-13 17:47:13,329 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2019-10-13 17:47:13,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-13 17:47:13,329 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:13,329 INFO L380 BasicCegarLoop]: trace histogram [29, 29, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:13,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:13,534 INFO L410 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:13,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:13,534 INFO L82 PathProgramCache]: Analyzing trace with hash 2027893843, now seen corresponding path program 29 times [2019-10-13 17:47:13,535 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:13,535 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741499750] [2019-10-13 17:47:13,535 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:13,535 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:13,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-13 17:47:14,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741499750] [2019-10-13 17:47:14,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305053813] [2019-10-13 17:47:14,118 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:14,842 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-10-13 17:47:14,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:14,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-13 17:47:14,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-10-13 17:47:15,096 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:15,096 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 15] total 46 [2019-10-13 17:47:15,096 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106689981] [2019-10-13 17:47:15,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-10-13 17:47:15,097 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:15,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-10-13 17:47:15,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=602, Invalid=1468, Unknown=0, NotChecked=0, Total=2070 [2019-10-13 17:47:15,098 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand 46 states. [2019-10-13 17:47:15,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:15,435 INFO L93 Difference]: Finished difference Result 171 states and 202 transitions. [2019-10-13 17:47:15,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-10-13 17:47:15,435 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 109 [2019-10-13 17:47:15,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:15,436 INFO L225 Difference]: With dead ends: 171 [2019-10-13 17:47:15,436 INFO L226 Difference]: Without dead ends: 122 [2019-10-13 17:47:15,437 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=602, Invalid=1468, Unknown=0, NotChecked=0, Total=2070 [2019-10-13 17:47:15,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-10-13 17:47:15,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2019-10-13 17:47:15,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-13 17:47:15,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 134 transitions. [2019-10-13 17:47:15,444 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 134 transitions. Word has length 109 [2019-10-13 17:47:15,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:15,445 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 134 transitions. [2019-10-13 17:47:15,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-10-13 17:47:15,445 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 134 transitions. [2019-10-13 17:47:15,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-13 17:47:15,446 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:15,446 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:15,651 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:15,652 INFO L410 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:15,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:15,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1676969349, now seen corresponding path program 30 times [2019-10-13 17:47:15,653 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:15,653 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264473908] [2019-10-13 17:47:15,653 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:15,653 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:15,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1147 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-10-13 17:47:16,267 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264473908] [2019-10-13 17:47:16,268 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677154987] [2019-10-13 17:47:16,268 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:17,648 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2019-10-13 17:47:17,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:17,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:47:17,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1147 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-10-13 17:47:17,960 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:17,960 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 16] total 48 [2019-10-13 17:47:17,960 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459408096] [2019-10-13 17:47:17,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-10-13 17:47:17,961 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:17,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-10-13 17:47:17,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1607, Unknown=0, NotChecked=0, Total=2256 [2019-10-13 17:47:17,962 INFO L87 Difference]: Start difference. First operand 119 states and 134 transitions. Second operand 48 states. [2019-10-13 17:47:18,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:18,372 INFO L93 Difference]: Finished difference Result 179 states and 212 transitions. [2019-10-13 17:47:18,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-10-13 17:47:18,373 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 114 [2019-10-13 17:47:18,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:18,374 INFO L225 Difference]: With dead ends: 179 [2019-10-13 17:47:18,375 INFO L226 Difference]: Without dead ends: 127 [2019-10-13 17:47:18,376 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=649, Invalid=1607, Unknown=0, NotChecked=0, Total=2256 [2019-10-13 17:47:18,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-10-13 17:47:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2019-10-13 17:47:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-10-13 17:47:18,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 140 transitions. [2019-10-13 17:47:18,382 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 140 transitions. Word has length 114 [2019-10-13 17:47:18,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:18,383 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 140 transitions. [2019-10-13 17:47:18,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-10-13 17:47:18,383 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 140 transitions. [2019-10-13 17:47:18,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-13 17:47:18,385 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:18,385 INFO L380 BasicCegarLoop]: trace histogram [31, 31, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:18,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:18,591 INFO L410 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:18,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:18,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1753737807, now seen corresponding path program 31 times [2019-10-13 17:47:18,592 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:18,592 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255703809] [2019-10-13 17:47:18,592 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:18,593 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:18,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-10-13 17:47:19,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255703809] [2019-10-13 17:47:19,317 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865284583] [2019-10-13 17:47:19,317 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:19,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-13 17:47:19,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-10-13 17:47:19,462 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:19,462 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2019-10-13 17:47:19,462 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820538610] [2019-10-13 17:47:19,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-13 17:47:19,463 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:19,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-13 17:47:19,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:47:19,464 INFO L87 Difference]: Start difference. First operand 124 states and 140 transitions. Second operand 36 states. [2019-10-13 17:47:19,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:19,644 INFO L93 Difference]: Finished difference Result 182 states and 214 transitions. [2019-10-13 17:47:19,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-13 17:47:19,644 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 119 [2019-10-13 17:47:19,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:19,645 INFO L225 Difference]: With dead ends: 182 [2019-10-13 17:47:19,645 INFO L226 Difference]: Without dead ends: 127 [2019-10-13 17:47:19,646 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:47:19,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-10-13 17:47:19,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2019-10-13 17:47:19,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-10-13 17:47:19,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 142 transitions. [2019-10-13 17:47:19,651 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 142 transitions. Word has length 119 [2019-10-13 17:47:19,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:19,651 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 142 transitions. [2019-10-13 17:47:19,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-13 17:47:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 142 transitions. [2019-10-13 17:47:19,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-13 17:47:19,652 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:19,652 INFO L380 BasicCegarLoop]: trace histogram [32, 32, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:19,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:19,857 INFO L410 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:19,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:19,857 INFO L82 PathProgramCache]: Analyzing trace with hash 162926829, now seen corresponding path program 32 times [2019-10-13 17:47:19,858 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:19,858 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723568216] [2019-10-13 17:47:19,858 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:19,858 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:19,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-10-13 17:47:20,718 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723568216] [2019-10-13 17:47:20,718 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957846212] [2019-10-13 17:47:20,718 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:20,816 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:20,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:20,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-13 17:47:20,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-10-13 17:47:20,849 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:20,849 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2019-10-13 17:47:20,849 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691037869] [2019-10-13 17:47:20,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-13 17:47:20,850 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:20,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-13 17:47:20,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 17:47:20,853 INFO L87 Difference]: Start difference. First operand 126 states and 142 transitions. Second operand 37 states. [2019-10-13 17:47:21,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:21,037 INFO L93 Difference]: Finished difference Result 184 states and 216 transitions. [2019-10-13 17:47:21,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-13 17:47:21,037 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 121 [2019-10-13 17:47:21,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:21,039 INFO L225 Difference]: With dead ends: 184 [2019-10-13 17:47:21,039 INFO L226 Difference]: Without dead ends: 129 [2019-10-13 17:47:21,040 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 17:47:21,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-10-13 17:47:21,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2019-10-13 17:47:21,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-10-13 17:47:21,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 144 transitions. [2019-10-13 17:47:21,048 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 144 transitions. Word has length 121 [2019-10-13 17:47:21,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:21,048 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 144 transitions. [2019-10-13 17:47:21,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-13 17:47:21,048 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 144 transitions. [2019-10-13 17:47:21,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 17:47:21,049 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:21,049 INFO L380 BasicCegarLoop]: trace histogram [33, 33, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:21,252 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:21,252 INFO L410 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:21,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:21,253 INFO L82 PathProgramCache]: Analyzing trace with hash 401934347, now seen corresponding path program 33 times [2019-10-13 17:47:21,253 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:21,254 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076132576] [2019-10-13 17:47:21,254 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:21,254 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:21,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-10-13 17:47:22,038 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076132576] [2019-10-13 17:47:22,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524581379] [2019-10-13 17:47:22,039 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:22,377 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-13 17:47:22,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:22,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 17:47:22,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2019-10-13 17:47:22,792 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:22,792 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 17] total 52 [2019-10-13 17:47:22,792 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771280174] [2019-10-13 17:47:22,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-10-13 17:47:22,793 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:22,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-10-13 17:47:22,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=767, Invalid=1885, Unknown=0, NotChecked=0, Total=2652 [2019-10-13 17:47:22,794 INFO L87 Difference]: Start difference. First operand 128 states and 144 transitions. Second operand 52 states. [2019-10-13 17:47:23,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:23,212 INFO L93 Difference]: Finished difference Result 191 states and 226 transitions. [2019-10-13 17:47:23,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-10-13 17:47:23,212 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 123 [2019-10-13 17:47:23,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:23,214 INFO L225 Difference]: With dead ends: 191 [2019-10-13 17:47:23,214 INFO L226 Difference]: Without dead ends: 136 [2019-10-13 17:47:23,215 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=767, Invalid=1885, Unknown=0, NotChecked=0, Total=2652 [2019-10-13 17:47:23,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-10-13 17:47:23,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2019-10-13 17:47:23,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-10-13 17:47:23,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 150 transitions. [2019-10-13 17:47:23,221 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 150 transitions. Word has length 123 [2019-10-13 17:47:23,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:23,221 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 150 transitions. [2019-10-13 17:47:23,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-10-13 17:47:23,222 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 150 transitions. [2019-10-13 17:47:23,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-13 17:47:23,222 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:23,223 INFO L380 BasicCegarLoop]: trace histogram [34, 34, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:23,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:23,427 INFO L410 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:23,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:23,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1276491709, now seen corresponding path program 34 times [2019-10-13 17:47:23,428 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:23,428 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63180169] [2019-10-13 17:47:23,428 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:23,428 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:23,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:23,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1486 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-10-13 17:47:24,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63180169] [2019-10-13 17:47:24,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642126493] [2019-10-13 17:47:24,199 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:24,302 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:47:24,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:24,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-13 17:47:24,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1486 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-10-13 17:47:24,331 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:24,331 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2019-10-13 17:47:24,331 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333764740] [2019-10-13 17:47:24,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-13 17:47:24,333 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:24,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-13 17:47:24,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2019-10-13 17:47:24,334 INFO L87 Difference]: Start difference. First operand 133 states and 150 transitions. Second operand 39 states. [2019-10-13 17:47:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:24,517 INFO L93 Difference]: Finished difference Result 194 states and 228 transitions. [2019-10-13 17:47:24,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-13 17:47:24,518 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 128 [2019-10-13 17:47:24,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:24,519 INFO L225 Difference]: With dead ends: 194 [2019-10-13 17:47:24,519 INFO L226 Difference]: Without dead ends: 136 [2019-10-13 17:47:24,520 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2019-10-13 17:47:24,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-10-13 17:47:24,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2019-10-13 17:47:24,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-10-13 17:47:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 152 transitions. [2019-10-13 17:47:24,525 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 152 transitions. Word has length 128 [2019-10-13 17:47:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:24,526 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 152 transitions. [2019-10-13 17:47:24,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-13 17:47:24,526 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 152 transitions. [2019-10-13 17:47:24,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 17:47:24,527 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:24,527 INFO L380 BasicCegarLoop]: trace histogram [35, 35, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:24,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:24,731 INFO L410 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:24,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:24,731 INFO L82 PathProgramCache]: Analyzing trace with hash 848999269, now seen corresponding path program 35 times [2019-10-13 17:47:24,732 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:24,732 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730735075] [2019-10-13 17:47:24,732 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:24,732 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:24,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1555 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-10-13 17:47:25,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730735075] [2019-10-13 17:47:25,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829688661] [2019-10-13 17:47:25,334 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:26,981 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-10-13 17:47:26,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:26,988 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 17:47:26,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1555 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2019-10-13 17:47:27,360 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:27,360 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 18] total 55 [2019-10-13 17:47:27,360 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447738710] [2019-10-13 17:47:27,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-10-13 17:47:27,361 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:27,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-10-13 17:47:27,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=2113, Unknown=0, NotChecked=0, Total=2970 [2019-10-13 17:47:27,362 INFO L87 Difference]: Start difference. First operand 135 states and 152 transitions. Second operand 55 states. [2019-10-13 17:47:27,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:27,686 INFO L93 Difference]: Finished difference Result 201 states and 238 transitions. [2019-10-13 17:47:27,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-10-13 17:47:27,687 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 130 [2019-10-13 17:47:27,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:27,688 INFO L225 Difference]: With dead ends: 201 [2019-10-13 17:47:27,688 INFO L226 Difference]: Without dead ends: 143 [2019-10-13 17:47:27,690 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=857, Invalid=2113, Unknown=0, NotChecked=0, Total=2970 [2019-10-13 17:47:27,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-10-13 17:47:27,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2019-10-13 17:47:27,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-10-13 17:47:27,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 158 transitions. [2019-10-13 17:47:27,698 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 158 transitions. Word has length 130 [2019-10-13 17:47:27,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:27,698 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 158 transitions. [2019-10-13 17:47:27,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-10-13 17:47:27,699 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 158 transitions. [2019-10-13 17:47:27,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-13 17:47:27,700 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:27,700 INFO L380 BasicCegarLoop]: trace histogram [36, 36, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:47:27,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:27,909 INFO L410 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:27,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:27,910 INFO L82 PathProgramCache]: Analyzing trace with hash -801893083, now seen corresponding path program 36 times [2019-10-13 17:47:27,910 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:27,911 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108192573] [2019-10-13 17:47:27,911 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:27,911 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:27,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:28,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-10-13 17:47:28,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108192573] [2019-10-13 17:47:28,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261047967] [2019-10-13 17:47:28,583 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true