/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/bor3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:10:08,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:10:08,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:10:08,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:10:08,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:10:08,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:10:08,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:10:08,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:10:08,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:10:08,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:10:08,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:10:08,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:10:08,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:10:08,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:10:08,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:10:08,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:10:08,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:10:08,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:10:08,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:10:08,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:10:08,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:10:08,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:10:08,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:10:08,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:10:08,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:10:08,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:10:08,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:10:08,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:10:08,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:10:08,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:10:08,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:10:08,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:10:08,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:10:08,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:10:08,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:10:08,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:10:08,944 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 [2019-11-23 20:10:08,960 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:10:08,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:10:08,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:10:08,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:10:08,962 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:10:08,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:10:08,962 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:10:08,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:10:08,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:10:08,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:10:08,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:10:08,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:10:08,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:10:08,964 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:10:08,964 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:10:08,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:10:08,964 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:10:08,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:10:08,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:10:08,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:10:08,965 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:10:08,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:10:08,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:10:08,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:10:08,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:10:08,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:10:08,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:10:08,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:10:08,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:10:08,967 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:10:09,233 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:10:09,253 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:10:09,259 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:10:09,260 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:10:09,260 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:10:09,261 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bor3.i [2019-11-23 20:10:09,334 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/797041d44/0c4c4904a2964229a056fb89f7c0bb70/FLAG9e1c1b187 [2019-11-23 20:10:09,761 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:10:09,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bor3.i [2019-11-23 20:10:09,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/797041d44/0c4c4904a2964229a056fb89f7c0bb70/FLAG9e1c1b187 [2019-11-23 20:10:10,157 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/797041d44/0c4c4904a2964229a056fb89f7c0bb70 [2019-11-23 20:10:10,168 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:10:10,170 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:10:10,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:10:10,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:10:10,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:10:10,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bfcce74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10, skipping insertion in model container [2019-11-23 20:10:10,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:10:10,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:10:10,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:10:10,399 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:10:10,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:10:10,435 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:10:10,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10 WrapperNode [2019-11-23 20:10:10,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:10:10,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:10:10,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:10:10,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:10:10,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,565 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:10:10,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:10:10,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:10:10,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:10:10,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (1/1) ... [2019-11-23 20:10:10,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:10:10,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:10:10,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:10:10,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:10:10,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (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 [2019-11-23 20:10:10,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:10:10,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:10:10,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:10:10,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:10:10,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:10:10,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:10:10,949 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:10:10,949 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:10:10,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:10:10 BoogieIcfgContainer [2019-11-23 20:10:10,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:10:10,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:10:10,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:10:10,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:10:10,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:10:10" (1/3) ... [2019-11-23 20:10:10,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377ad7d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:10:10, skipping insertion in model container [2019-11-23 20:10:10,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:10:10" (2/3) ... [2019-11-23 20:10:10,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377ad7d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:10:10, skipping insertion in model container [2019-11-23 20:10:10,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:10:10" (3/3) ... [2019-11-23 20:10:10,959 INFO L109 eAbstractionObserver]: Analyzing ICFG bor3.i [2019-11-23 20:10:10,973 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:10:10,994 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:10:11,026 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:10:11,062 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:10:11,063 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:10:11,063 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:10:11,063 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:10:11,063 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:10:11,063 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:10:11,064 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:10:11,064 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:10:11,082 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 20:10:11,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:10:11,090 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:11,091 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:11,091 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:11,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:11,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2019-11-23 20:10:11,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:11,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972448313] [2019-11-23 20:10:11,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:10:11,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972448313] [2019-11-23 20:10:11,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:10:11,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:10:11,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461440215] [2019-11-23 20:10:11,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:10:11,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:11,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:10:11,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:10:11,292 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 20:10:11,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:11,335 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-23 20:10:11,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:10:11,340 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 20:10:11,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:11,356 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:10:11,357 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:10:11,365 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:10:11,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:10:11,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 20:10:11,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:10:11,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 20:10:11,420 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2019-11-23 20:10:11,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:11,421 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 20:10:11,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:10:11,422 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 20:10:11,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:10:11,424 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:11,424 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:11,425 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:11,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:11,426 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2019-11-23 20:10:11,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:11,428 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265947164] [2019-11-23 20:10:11,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:10:11,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265947164] [2019-11-23 20:10:11,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:10:11,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:10:11,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779531700] [2019-11-23 20:10:11,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:10:11,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:11,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:10:11,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:10:11,534 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-23 20:10:11,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:11,590 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 20:10:11,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:10:11,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 20:10:11,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:11,592 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:10:11,592 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:10:11,593 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:10:11,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:10:11,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 20:10:11,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:10:11,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 20:10:11,600 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-11-23 20:10:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:11,600 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 20:10:11,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:10:11,601 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 20:10:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:10:11,602 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:11,602 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:11,602 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:11,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:11,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2019-11-23 20:10:11,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:11,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062548781] [2019-11-23 20:10:11,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:10:11,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062548781] [2019-11-23 20:10:11,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:10:11,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:10:11,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933028266] [2019-11-23 20:10:11,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:10:11,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:11,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:10:11,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:10:11,673 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-23 20:10:11,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:11,702 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 20:10:11,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:10:11,703 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 20:10:11,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:11,704 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:10:11,704 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:10:11,706 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:10:11,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:10:11,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:10:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:10:11,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 20:10:11,720 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 20:10:11,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:11,722 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 20:10:11,722 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:10:11,722 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 20:10:11,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:10:11,723 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:11,723 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:11,724 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:11,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:11,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2019-11-23 20:10:11,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:11,726 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818030701] [2019-11-23 20:10:11,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:10:11,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818030701] [2019-11-23 20:10:11,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667704504] [2019-11-23 20:10:11,805 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 [2019-11-23 20:10:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:11,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:10:11,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:10:11,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:11,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:10:11,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623090924] [2019-11-23 20:10:11,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:10:11,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:11,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:10:11,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:10:11,909 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-11-23 20:10:11,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:11,945 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-11-23 20:10:11,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:10:11,947 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-23 20:10:11,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:11,948 INFO L225 Difference]: With dead ends: 54 [2019-11-23 20:10:11,948 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:10:11,951 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:10:11,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:10:11,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 20:10:11,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:10:11,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-23 20:10:11,963 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-23 20:10:11,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:11,963 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-23 20:10:11,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:10:11,964 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-23 20:10:11,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:10:11,965 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:11,965 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:12,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:12,170 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:12,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:12,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2019-11-23 20:10:12,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:12,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438262984] [2019-11-23 20:10:12,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:12,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:10:12,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438262984] [2019-11-23 20:10:12,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992465863] [2019-11-23 20:10:12,288 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 [2019-11-23 20:10:12,383 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:10:12,385 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:12,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:10:12,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:10:12,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:12,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:10:12,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854371053] [2019-11-23 20:10:12,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:10:12,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:12,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:10:12,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:10:12,420 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-11-23 20:10:12,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:12,473 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-11-23 20:10:12,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:10:12,475 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 20:10:12,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:12,476 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:10:12,476 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:10:12,477 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:10:12,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:10:12,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 20:10:12,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:10:12,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 20:10:12,484 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2019-11-23 20:10:12,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:12,485 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 20:10:12,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:10:12,485 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 20:10:12,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:10:12,486 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:12,486 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:12,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:12,690 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:12,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:12,691 INFO L82 PathProgramCache]: Analyzing trace with hash -137911400, now seen corresponding path program 3 times [2019-11-23 20:10:12,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:12,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019168505] [2019-11-23 20:10:12,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:10:12,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019168505] [2019-11-23 20:10:12,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422266509] [2019-11-23 20:10:12,780 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 [2019-11-23 20:10:12,837 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:10:12,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:12,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:10:12,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:10:12,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:12,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:10:12,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086034398] [2019-11-23 20:10:12,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:10:12,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:12,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:10:12,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:10:12,865 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-11-23 20:10:12,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:12,966 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 20:10:12,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:10:12,967 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 20:10:12,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:12,968 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:10:12,968 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:10:12,968 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:10:12,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:10:12,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 20:10:12,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:10:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 20:10:12,985 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2019-11-23 20:10:12,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:12,985 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 20:10:12,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:10:12,986 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 20:10:12,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:10:12,987 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:12,987 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:13,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:13,188 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:13,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:13,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1281406804, now seen corresponding path program 4 times [2019-11-23 20:10:13,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:13,190 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127195117] [2019-11-23 20:10:13,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:10:13,321 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127195117] [2019-11-23 20:10:13,321 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437351188] [2019-11-23 20:10:13,322 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 [2019-11-23 20:10:13,379 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:10:13,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:13,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:10:13,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:10:13,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:13,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 20:10:13,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456495470] [2019-11-23 20:10:13,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:10:13,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:13,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:10:13,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:10:13,427 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-11-23 20:10:13,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:13,548 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-11-23 20:10:13,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:10:13,549 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 20:10:13,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:13,549 INFO L225 Difference]: With dead ends: 85 [2019-11-23 20:10:13,550 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:10:13,550 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:10:13,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:10:13,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-11-23 20:10:13,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:10:13,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-23 20:10:13,557 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2019-11-23 20:10:13,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:13,558 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-23 20:10:13,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:10:13,558 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-23 20:10:13,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:10:13,559 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:13,559 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:13,771 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:13,772 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:13,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:13,772 INFO L82 PathProgramCache]: Analyzing trace with hash 719163408, now seen corresponding path program 5 times [2019-11-23 20:10:13,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:13,773 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352428951] [2019-11-23 20:10:13,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:10:13,880 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352428951] [2019-11-23 20:10:13,880 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68990461] [2019-11-23 20:10:13,880 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 [2019-11-23 20:10:13,967 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:10:13,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:13,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:10:13,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 20:10:14,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:14,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 20:10:14,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707142938] [2019-11-23 20:10:14,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:10:14,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:14,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:10:14,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:10:14,036 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2019-11-23 20:10:14,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:14,131 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2019-11-23 20:10:14,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:10:14,132 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-23 20:10:14,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:14,133 INFO L225 Difference]: With dead ends: 99 [2019-11-23 20:10:14,133 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:10:14,134 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:10:14,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:10:14,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 20:10:14,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:10:14,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 20:10:14,141 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2019-11-23 20:10:14,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:14,141 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 20:10:14,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:10:14,141 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 20:10:14,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:10:14,143 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:14,143 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:14,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:14,355 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:14,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:14,356 INFO L82 PathProgramCache]: Analyzing trace with hash 25423308, now seen corresponding path program 6 times [2019-11-23 20:10:14,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:14,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134240196] [2019-11-23 20:10:14,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 20:10:14,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134240196] [2019-11-23 20:10:14,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305069125] [2019-11-23 20:10:14,491 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 [2019-11-23 20:10:14,568 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:10:14,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:14,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:10:14,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 20:10:14,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:14,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-23 20:10:14,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489215030] [2019-11-23 20:10:14,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:10:14,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:14,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:10:14,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:10:14,615 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2019-11-23 20:10:14,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:14,688 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2019-11-23 20:10:14,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:10:14,689 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-11-23 20:10:14,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:14,690 INFO L225 Difference]: With dead ends: 107 [2019-11-23 20:10:14,690 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:10:14,691 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:10:14,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:10:14,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-23 20:10:14,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:10:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-11-23 20:10:14,704 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 57 [2019-11-23 20:10:14,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:14,705 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-11-23 20:10:14,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:10:14,705 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-11-23 20:10:14,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:10:14,707 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:14,707 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:14,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:14,918 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:14,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:14,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 7 times [2019-11-23 20:10:14,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:14,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135018991] [2019-11-23 20:10:14,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:14,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:10:15,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135018991] [2019-11-23 20:10:15,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119693651] [2019-11-23 20:10:15,029 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 [2019-11-23 20:10:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:15,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:10:15,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:10:15,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:15,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:10:15,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775319826] [2019-11-23 20:10:15,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:10:15,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:15,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:10:15,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:10:15,138 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2019-11-23 20:10:15,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:15,184 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-23 20:10:15,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:10:15,185 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-11-23 20:10:15,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:15,186 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:10:15,186 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:10:15,188 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:10:15,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:10:15,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-23 20:10:15,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:10:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-23 20:10:15,203 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2019-11-23 20:10:15,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:15,204 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-23 20:10:15,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:10:15,204 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-23 20:10:15,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:10:15,207 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:15,207 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:15,408 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:15,408 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:15,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:15,408 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 8 times [2019-11-23 20:10:15,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:15,409 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467301768] [2019-11-23 20:10:15,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:10:15,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467301768] [2019-11-23 20:10:15,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651081251] [2019-11-23 20:10:15,517 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 [2019-11-23 20:10:15,585 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:10:15,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:15,586 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:10:15,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:10:15,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:15,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:10:15,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96816385] [2019-11-23 20:10:15,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:10:15,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:15,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:10:15,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:10:15,632 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2019-11-23 20:10:15,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:15,681 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2019-11-23 20:10:15,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:10:15,682 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2019-11-23 20:10:15,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:15,683 INFO L225 Difference]: With dead ends: 112 [2019-11-23 20:10:15,683 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:10:15,684 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:10:15,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:10:15,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 20:10:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:10:15,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 20:10:15,693 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2019-11-23 20:10:15,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:15,693 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 20:10:15,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:10:15,693 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 20:10:15,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:10:15,695 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:15,695 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:15,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:15,909 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:15,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:15,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1307453444, now seen corresponding path program 9 times [2019-11-23 20:10:15,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:15,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288558966] [2019-11-23 20:10:15,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:16,022 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:10:16,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288558966] [2019-11-23 20:10:16,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654939287] [2019-11-23 20:10:16,023 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 [2019-11-23 20:10:16,085 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:10:16,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:16,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:10:16,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:16,132 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-11-23 20:10:16,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:16,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-11-23 20:10:16,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635290012] [2019-11-23 20:10:16,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:10:16,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:16,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:10:16,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:10:16,134 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 16 states. [2019-11-23 20:10:16,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:16,211 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2019-11-23 20:10:16,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:10:16,212 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-11-23 20:10:16,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:16,213 INFO L225 Difference]: With dead ends: 117 [2019-11-23 20:10:16,213 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:10:16,213 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:10:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:10:16,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-23 20:10:16,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:10:16,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-11-23 20:10:16,220 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 65 [2019-11-23 20:10:16,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:16,220 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-11-23 20:10:16,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:10:16,220 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-11-23 20:10:16,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:10:16,222 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:16,222 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:16,425 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:16,426 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:16,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:16,426 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 10 times [2019-11-23 20:10:16,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:16,427 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118973167] [2019-11-23 20:10:16,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:10:16,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118973167] [2019-11-23 20:10:16,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651067231] [2019-11-23 20:10:16,546 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 [2019-11-23 20:10:16,613 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:10:16,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:16,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:10:16,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:10:16,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:16,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:10:16,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711631798] [2019-11-23 20:10:16,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:10:16,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:16,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:10:16,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:10:16,645 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2019-11-23 20:10:16,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:16,689 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2019-11-23 20:10:16,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:10:16,689 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2019-11-23 20:10:16,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:16,690 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:10:16,690 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:10:16,691 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:10:16,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:10:16,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 20:10:16,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:10:16,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-11-23 20:10:16,696 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2019-11-23 20:10:16,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:16,696 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-11-23 20:10:16,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:10:16,697 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-11-23 20:10:16,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:10:16,698 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:16,698 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:16,901 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:16,902 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:16,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:16,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 11 times [2019-11-23 20:10:16,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:16,903 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293472157] [2019-11-23 20:10:16,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:10:17,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293472157] [2019-11-23 20:10:17,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292119010] [2019-11-23 20:10:17,053 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 [2019-11-23 20:10:17,295 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:10:17,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:17,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:10:17,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:10:17,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:17,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:10:17,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886252863] [2019-11-23 20:10:17,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:10:17,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:17,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:10:17,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:10:17,345 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 15 states. [2019-11-23 20:10:17,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:17,386 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2019-11-23 20:10:17,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:10:17,386 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2019-11-23 20:10:17,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:17,387 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:10:17,387 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 20:10:17,388 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:10:17,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 20:10:17,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-11-23 20:10:17,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 20:10:17,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2019-11-23 20:10:17,392 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 71 [2019-11-23 20:10:17,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:17,393 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2019-11-23 20:10:17,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:10:17,393 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2019-11-23 20:10:17,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-23 20:10:17,394 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:17,394 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:17,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:17,599 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:17,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:17,599 INFO L82 PathProgramCache]: Analyzing trace with hash 581786172, now seen corresponding path program 12 times [2019-11-23 20:10:17,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:17,600 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104853664] [2019-11-23 20:10:17,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:10:17,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104853664] [2019-11-23 20:10:17,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089547974] [2019-11-23 20:10:17,740 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 [2019-11-23 20:10:17,933 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 20:10:17,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:17,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:10:17,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-23 20:10:18,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:18,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 20:10:18,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991967327] [2019-11-23 20:10:18,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:10:18,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:18,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:10:18,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:10:18,025 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 20 states. [2019-11-23 20:10:18,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:18,116 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2019-11-23 20:10:18,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:10:18,117 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 73 [2019-11-23 20:10:18,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:18,117 INFO L225 Difference]: With dead ends: 127 [2019-11-23 20:10:18,117 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:10:18,118 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:10:18,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:10:18,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2019-11-23 20:10:18,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 20:10:18,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2019-11-23 20:10:18,123 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 73 [2019-11-23 20:10:18,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:18,123 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2019-11-23 20:10:18,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:10:18,123 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2019-11-23 20:10:18,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:10:18,124 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:18,124 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:18,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:18,328 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:18,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:18,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1574617224, now seen corresponding path program 13 times [2019-11-23 20:10:18,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:18,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385198960] [2019-11-23 20:10:18,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:18,496 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 20:10:18,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385198960] [2019-11-23 20:10:18,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621164212] [2019-11-23 20:10:18,497 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 [2019-11-23 20:10:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:18,561 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:10:18,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 20:10:18,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:18,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:10:18,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918812857] [2019-11-23 20:10:18,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:10:18,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:18,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:10:18,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:10:18,602 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 17 states. [2019-11-23 20:10:18,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:18,649 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2019-11-23 20:10:18,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:10:18,649 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2019-11-23 20:10:18,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:18,650 INFO L225 Difference]: With dead ends: 130 [2019-11-23 20:10:18,650 INFO L226 Difference]: Without dead ends: 81 [2019-11-23 20:10:18,650 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:10:18,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-23 20:10:18,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2019-11-23 20:10:18,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:10:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-11-23 20:10:18,654 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2019-11-23 20:10:18,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:18,655 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-11-23 20:10:18,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:10:18,655 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-11-23 20:10:18,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:10:18,656 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:18,656 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:18,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:18,859 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:18,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:18,859 INFO L82 PathProgramCache]: Analyzing trace with hash 907193782, now seen corresponding path program 14 times [2019-11-23 20:10:18,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:18,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684180705] [2019-11-23 20:10:18,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 20:10:19,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684180705] [2019-11-23 20:10:19,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420872803] [2019-11-23 20:10:19,033 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 [2019-11-23 20:10:19,122 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:10:19,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:19,123 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:10:19,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 20:10:19,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:19,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:10:19,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336735461] [2019-11-23 20:10:19,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:10:19,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:19,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:10:19,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:10:19,170 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 18 states. [2019-11-23 20:10:19,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:19,229 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2019-11-23 20:10:19,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:10:19,230 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2019-11-23 20:10:19,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:19,231 INFO L225 Difference]: With dead ends: 132 [2019-11-23 20:10:19,231 INFO L226 Difference]: Without dead ends: 83 [2019-11-23 20:10:19,231 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:10:19,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-23 20:10:19,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2019-11-23 20:10:19,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-23 20:10:19,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2019-11-23 20:10:19,236 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 79 [2019-11-23 20:10:19,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:19,236 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2019-11-23 20:10:19,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:10:19,236 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2019-11-23 20:10:19,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:10:19,237 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:19,237 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:19,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:19,447 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:19,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:19,448 INFO L82 PathProgramCache]: Analyzing trace with hash -2074246028, now seen corresponding path program 15 times [2019-11-23 20:10:19,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:19,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444096871] [2019-11-23 20:10:19,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 20:10:19,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444096871] [2019-11-23 20:10:19,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972537685] [2019-11-23 20:10:19,632 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 [2019-11-23 20:10:19,690 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:10:19,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:19,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:10:19,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2019-11-23 20:10:19,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:19,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7] total 23 [2019-11-23 20:10:19,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270930468] [2019-11-23 20:10:19,772 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:10:19,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:19,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:10:19,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:10:19,773 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 23 states. [2019-11-23 20:10:19,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:19,931 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2019-11-23 20:10:19,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:10:19,932 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 81 [2019-11-23 20:10:19,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:19,933 INFO L225 Difference]: With dead ends: 143 [2019-11-23 20:10:19,933 INFO L226 Difference]: Without dead ends: 94 [2019-11-23 20:10:19,934 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:10:19,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-23 20:10:19,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2019-11-23 20:10:19,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-23 20:10:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2019-11-23 20:10:19,939 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 81 [2019-11-23 20:10:19,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:19,940 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2019-11-23 20:10:19,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:10:19,940 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2019-11-23 20:10:19,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-23 20:10:19,941 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:19,941 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:20,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:20,145 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:20,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:20,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2002949072, now seen corresponding path program 16 times [2019-11-23 20:10:20,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:20,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124869496] [2019-11-23 20:10:20,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:20,368 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:10:20,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124869496] [2019-11-23 20:10:20,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983276530] [2019-11-23 20:10:20,369 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 [2019-11-23 20:10:20,432 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:10:20,432 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:20,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:10:20,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-11-23 20:10:20,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:20,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2019-11-23 20:10:20,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317336755] [2019-11-23 20:10:20,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:10:20,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:20,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:10:20,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:10:20,516 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 25 states. [2019-11-23 20:10:20,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:20,711 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2019-11-23 20:10:20,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:10:20,711 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 89 [2019-11-23 20:10:20,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:20,712 INFO L225 Difference]: With dead ends: 157 [2019-11-23 20:10:20,713 INFO L226 Difference]: Without dead ends: 102 [2019-11-23 20:10:20,714 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:10:20,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-23 20:10:20,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2019-11-23 20:10:20,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-23 20:10:20,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2019-11-23 20:10:20,718 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 89 [2019-11-23 20:10:20,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:20,718 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2019-11-23 20:10:20,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:10:20,719 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2019-11-23 20:10:20,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-23 20:10:20,719 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:20,719 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:20,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:20,923 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:20,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:20,924 INFO L82 PathProgramCache]: Analyzing trace with hash 740595948, now seen corresponding path program 17 times [2019-11-23 20:10:20,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:20,925 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661213497] [2019-11-23 20:10:20,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2019-11-23 20:10:21,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661213497] [2019-11-23 20:10:21,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013924223] [2019-11-23 20:10:21,145 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 [2019-11-23 20:10:21,877 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:10:21,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:21,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:10:21,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2019-11-23 20:10:22,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:22,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 27 [2019-11-23 20:10:22,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80023466] [2019-11-23 20:10:22,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:10:22,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:22,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:10:22,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:10:22,018 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 27 states. [2019-11-23 20:10:22,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:22,217 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2019-11-23 20:10:22,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:10:22,218 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 97 [2019-11-23 20:10:22,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:22,220 INFO L225 Difference]: With dead ends: 171 [2019-11-23 20:10:22,220 INFO L226 Difference]: Without dead ends: 110 [2019-11-23 20:10:22,221 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:10:22,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-23 20:10:22,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2019-11-23 20:10:22,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-23 20:10:22,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2019-11-23 20:10:22,225 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 97 [2019-11-23 20:10:22,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:22,225 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2019-11-23 20:10:22,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:10:22,225 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2019-11-23 20:10:22,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-23 20:10:22,226 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:22,226 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:22,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:22,428 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:22,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:22,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1947781800, now seen corresponding path program 18 times [2019-11-23 20:10:22,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:22,429 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786792373] [2019-11-23 20:10:22,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2019-11-23 20:10:22,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786792373] [2019-11-23 20:10:22,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647337697] [2019-11-23 20:10:22,655 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 [2019-11-23 20:10:22,820 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-23 20:10:22,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:22,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:10:22,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2019-11-23 20:10:22,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:22,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8] total 27 [2019-11-23 20:10:22,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016388754] [2019-11-23 20:10:22,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:10:22,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:22,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:10:22,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:10:22,941 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 27 states. [2019-11-23 20:10:23,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:23,064 INFO L93 Difference]: Finished difference Result 179 states and 188 transitions. [2019-11-23 20:10:23,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:10:23,064 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2019-11-23 20:10:23,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:23,065 INFO L225 Difference]: With dead ends: 179 [2019-11-23 20:10:23,065 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 20:10:23,066 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:10:23,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 20:10:23,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2019-11-23 20:10:23,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-11-23 20:10:23,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2019-11-23 20:10:23,071 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 105 [2019-11-23 20:10:23,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:23,071 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2019-11-23 20:10:23,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:10:23,072 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2019-11-23 20:10:23,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-23 20:10:23,073 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:23,073 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:23,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:23,278 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:23,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:23,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1518428956, now seen corresponding path program 19 times [2019-11-23 20:10:23,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:23,279 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407586937] [2019-11-23 20:10:23,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 20:10:23,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407586937] [2019-11-23 20:10:23,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644734176] [2019-11-23 20:10:23,548 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 [2019-11-23 20:10:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:23,617 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:10:23,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 20:10:23,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:23,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:10:23,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124027084] [2019-11-23 20:10:23,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:10:23,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:23,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:10:23,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:10:23,651 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 23 states. [2019-11-23 20:10:23,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:23,725 INFO L93 Difference]: Finished difference Result 182 states and 190 transitions. [2019-11-23 20:10:23,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:10:23,727 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2019-11-23 20:10:23,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:23,728 INFO L225 Difference]: With dead ends: 182 [2019-11-23 20:10:23,728 INFO L226 Difference]: Without dead ends: 113 [2019-11-23 20:10:23,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:10:23,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-11-23 20:10:23,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2019-11-23 20:10:23,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 20:10:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2019-11-23 20:10:23,733 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 109 [2019-11-23 20:10:23,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:23,733 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2019-11-23 20:10:23,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:10:23,733 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2019-11-23 20:10:23,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 20:10:23,734 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:23,734 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:23,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:23,937 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:23,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:23,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1920176930, now seen corresponding path program 20 times [2019-11-23 20:10:23,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:23,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47953192] [2019-11-23 20:10:23,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 20:10:24,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47953192] [2019-11-23 20:10:24,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558245463] [2019-11-23 20:10:24,213 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 [2019-11-23 20:10:24,308 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:10:24,309 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:24,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:10:24,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 20:10:24,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:24,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:10:24,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886871754] [2019-11-23 20:10:24,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:10:24,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:24,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:10:24,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:10:24,338 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 24 states. [2019-11-23 20:10:24,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:24,410 INFO L93 Difference]: Finished difference Result 184 states and 192 transitions. [2019-11-23 20:10:24,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:10:24,410 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 111 [2019-11-23 20:10:24,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:24,411 INFO L225 Difference]: With dead ends: 184 [2019-11-23 20:10:24,411 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 20:10:24,412 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:10:24,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 20:10:24,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-11-23 20:10:24,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 20:10:24,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2019-11-23 20:10:24,418 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2019-11-23 20:10:24,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:24,418 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2019-11-23 20:10:24,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:10:24,418 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2019-11-23 20:10:24,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 20:10:24,419 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:24,419 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:24,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:24,624 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:24,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:24,625 INFO L82 PathProgramCache]: Analyzing trace with hash -704384544, now seen corresponding path program 21 times [2019-11-23 20:10:24,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:24,626 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421627645] [2019-11-23 20:10:24,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 20:10:24,883 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421627645] [2019-11-23 20:10:24,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192170882] [2019-11-23 20:10:24,885 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 [2019-11-23 20:10:24,978 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 20:10:24,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:24,979 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:10:24,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-11-23 20:10:25,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:25,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 9] total 31 [2019-11-23 20:10:25,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779845069] [2019-11-23 20:10:25,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:10:25,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:25,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:10:25,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:10:25,086 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 31 states. [2019-11-23 20:10:25,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:25,240 INFO L93 Difference]: Finished difference Result 189 states and 198 transitions. [2019-11-23 20:10:25,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:10:25,242 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 113 [2019-11-23 20:10:25,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:25,243 INFO L225 Difference]: With dead ends: 189 [2019-11-23 20:10:25,243 INFO L226 Difference]: Without dead ends: 120 [2019-11-23 20:10:25,244 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:10:25,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-11-23 20:10:25,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2019-11-23 20:10:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-11-23 20:10:25,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2019-11-23 20:10:25,248 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 113 [2019-11-23 20:10:25,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:25,248 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2019-11-23 20:10:25,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:10:25,249 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2019-11-23 20:10:25,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-23 20:10:25,249 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:25,250 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:25,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:25,454 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:25,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:25,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1102432228, now seen corresponding path program 22 times [2019-11-23 20:10:25,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:25,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696377174] [2019-11-23 20:10:25,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:10:25,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696377174] [2019-11-23 20:10:25,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859547270] [2019-11-23 20:10:25,851 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 [2019-11-23 20:10:25,962 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:10:25,963 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:25,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:10:25,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:10:26,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:26,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:10:26,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820328307] [2019-11-23 20:10:26,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:10:26,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:26,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:10:26,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:10:26,021 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 26 states. [2019-11-23 20:10:26,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:26,143 INFO L93 Difference]: Finished difference Result 192 states and 200 transitions. [2019-11-23 20:10:26,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:10:26,144 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 117 [2019-11-23 20:10:26,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:26,145 INFO L225 Difference]: With dead ends: 192 [2019-11-23 20:10:26,146 INFO L226 Difference]: Without dead ends: 121 [2019-11-23 20:10:26,147 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:10:26,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-23 20:10:26,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2019-11-23 20:10:26,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-11-23 20:10:26,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2019-11-23 20:10:26,153 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 117 [2019-11-23 20:10:26,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:26,153 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2019-11-23 20:10:26,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:10:26,154 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2019-11-23 20:10:26,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-23 20:10:26,155 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:26,155 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:26,360 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:26,361 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:26,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:26,361 INFO L82 PathProgramCache]: Analyzing trace with hash 41685082, now seen corresponding path program 23 times [2019-11-23 20:10:26,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:26,361 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137901662] [2019-11-23 20:10:26,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:26,695 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:10:26,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137901662] [2019-11-23 20:10:26,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703825586] [2019-11-23 20:10:26,696 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 [2019-11-23 20:10:27,912 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 20:10:27,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:27,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:10:27,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-11-23 20:10:28,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:28,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2019-11-23 20:10:28,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730323861] [2019-11-23 20:10:28,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 20:10:28,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:28,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 20:10:28,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:10:28,128 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 34 states. [2019-11-23 20:10:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:28,385 INFO L93 Difference]: Finished difference Result 203 states and 214 transitions. [2019-11-23 20:10:28,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:10:28,386 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 119 [2019-11-23 20:10:28,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:28,387 INFO L225 Difference]: With dead ends: 203 [2019-11-23 20:10:28,387 INFO L226 Difference]: Without dead ends: 132 [2019-11-23 20:10:28,388 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:10:28,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-11-23 20:10:28,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2019-11-23 20:10:28,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-11-23 20:10:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2019-11-23 20:10:28,393 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 119 [2019-11-23 20:10:28,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:28,394 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2019-11-23 20:10:28,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 20:10:28,394 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2019-11-23 20:10:28,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-23 20:10:28,395 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:28,395 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:28,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:28,600 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:28,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:28,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1061851926, now seen corresponding path program 24 times [2019-11-23 20:10:28,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:28,601 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476417707] [2019-11-23 20:10:28,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:10:28,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476417707] [2019-11-23 20:10:28,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552589851] [2019-11-23 20:10:28,974 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 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 [2019-11-23 20:10:30,808 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-23 20:10:30,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:30,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:10:30,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2019-11-23 20:10:30,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:30,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-11-23 20:10:30,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237005172] [2019-11-23 20:10:30,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:10:30,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:30,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:10:30,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:10:30,992 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 35 states. [2019-11-23 20:10:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:31,107 INFO L93 Difference]: Finished difference Result 211 states and 220 transitions. [2019-11-23 20:10:31,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:10:31,108 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 127 [2019-11-23 20:10:31,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:31,109 INFO L225 Difference]: With dead ends: 211 [2019-11-23 20:10:31,109 INFO L226 Difference]: Without dead ends: 134 [2019-11-23 20:10:31,110 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:10:31,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-11-23 20:10:31,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2019-11-23 20:10:31,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-11-23 20:10:31,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2019-11-23 20:10:31,114 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 127 [2019-11-23 20:10:31,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:31,115 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2019-11-23 20:10:31,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:10:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2019-11-23 20:10:31,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-23 20:10:31,116 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:31,116 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:31,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:31,321 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:31,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:31,322 INFO L82 PathProgramCache]: Analyzing trace with hash 21819218, now seen corresponding path program 25 times [2019-11-23 20:10:31,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:31,322 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643488066] [2019-11-23 20:10:31,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 881 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:10:31,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643488066] [2019-11-23 20:10:31,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730944728] [2019-11-23 20:10:31,778 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 [2019-11-23 20:10:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:31,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:10:31,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 881 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:10:31,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:31,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:10:31,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53883663] [2019-11-23 20:10:31,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:10:31,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:31,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:10:31,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:10:31,888 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand 29 states. [2019-11-23 20:10:31,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:31,979 INFO L93 Difference]: Finished difference Result 214 states and 222 transitions. [2019-11-23 20:10:31,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:10:31,979 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 131 [2019-11-23 20:10:31,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:31,980 INFO L225 Difference]: With dead ends: 214 [2019-11-23 20:10:31,980 INFO L226 Difference]: Without dead ends: 135 [2019-11-23 20:10:31,981 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:10:31,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-11-23 20:10:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2019-11-23 20:10:31,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-23 20:10:31,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2019-11-23 20:10:31,986 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 131 [2019-11-23 20:10:31,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:31,986 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2019-11-23 20:10:31,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:10:31,986 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2019-11-23 20:10:31,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-23 20:10:31,987 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:31,987 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:32,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:32,191 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:32,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:32,192 INFO L82 PathProgramCache]: Analyzing trace with hash -2138537200, now seen corresponding path program 26 times [2019-11-23 20:10:32,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:32,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953266393] [2019-11-23 20:10:32,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:32,642 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:10:32,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953266393] [2019-11-23 20:10:32,643 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573523131] [2019-11-23 20:10:32,643 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 [2019-11-23 20:10:32,760 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:10:32,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:32,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:10:32,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:10:32,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:32,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:10:32,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123225164] [2019-11-23 20:10:32,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:10:32,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:32,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:10:32,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:10:32,820 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 30 states. [2019-11-23 20:10:32,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:32,906 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2019-11-23 20:10:32,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:10:32,907 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 133 [2019-11-23 20:10:32,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:32,908 INFO L225 Difference]: With dead ends: 216 [2019-11-23 20:10:32,908 INFO L226 Difference]: Without dead ends: 137 [2019-11-23 20:10:32,909 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:10:32,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-23 20:10:32,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2019-11-23 20:10:32,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-23 20:10:32,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2019-11-23 20:10:32,913 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 133 [2019-11-23 20:10:32,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:32,913 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2019-11-23 20:10:32,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:10:32,913 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2019-11-23 20:10:32,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-23 20:10:32,914 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:32,914 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:33,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:33,115 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:33,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:33,115 INFO L82 PathProgramCache]: Analyzing trace with hash 523116366, now seen corresponding path program 27 times [2019-11-23 20:10:33,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:33,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353035456] [2019-11-23 20:10:33,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:10:33,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353035456] [2019-11-23 20:10:33,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101752901] [2019-11-23 20:10:33,583 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 [2019-11-23 20:10:33,814 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:10:33,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:33,816 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:10:33,819 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:34,007 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 921 trivial. 0 not checked. [2019-11-23 20:10:34,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:34,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 11] total 39 [2019-11-23 20:10:34,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623932951] [2019-11-23 20:10:34,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:10:34,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:34,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:10:34,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:10:34,009 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 39 states. [2019-11-23 20:10:34,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:34,226 INFO L93 Difference]: Finished difference Result 227 states and 238 transitions. [2019-11-23 20:10:34,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:10:34,227 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 135 [2019-11-23 20:10:34,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:34,228 INFO L225 Difference]: With dead ends: 227 [2019-11-23 20:10:34,228 INFO L226 Difference]: Without dead ends: 148 [2019-11-23 20:10:34,229 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:10:34,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-11-23 20:10:34,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2019-11-23 20:10:34,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-11-23 20:10:34,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2019-11-23 20:10:34,233 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 135 [2019-11-23 20:10:34,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:34,234 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2019-11-23 20:10:34,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:10:34,234 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2019-11-23 20:10:34,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-23 20:10:34,235 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:34,235 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:34,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:34,439 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:34,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:34,439 INFO L82 PathProgramCache]: Analyzing trace with hash 191675914, now seen corresponding path program 28 times [2019-11-23 20:10:34,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:34,440 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886351455] [2019-11-23 20:10:34,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:10:34,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886351455] [2019-11-23 20:10:34,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045143853] [2019-11-23 20:10:34,860 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 [2019-11-23 20:10:34,956 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:10:34,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:34,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:10:34,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:10:34,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:34,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:10:34,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942032282] [2019-11-23 20:10:34,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:10:34,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:34,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:10:34,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:10:34,995 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand 32 states. [2019-11-23 20:10:35,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:35,092 INFO L93 Difference]: Finished difference Result 232 states and 240 transitions. [2019-11-23 20:10:35,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:10:35,093 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 143 [2019-11-23 20:10:35,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:35,094 INFO L225 Difference]: With dead ends: 232 [2019-11-23 20:10:35,094 INFO L226 Difference]: Without dead ends: 147 [2019-11-23 20:10:35,095 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:10:35,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-11-23 20:10:35,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2019-11-23 20:10:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-23 20:10:35,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2019-11-23 20:10:35,099 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 143 [2019-11-23 20:10:35,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:35,099 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2019-11-23 20:10:35,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:10:35,099 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2019-11-23 20:10:35,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-23 20:10:35,100 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:35,100 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:35,300 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:35,301 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:35,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:35,301 INFO L82 PathProgramCache]: Analyzing trace with hash -870144824, now seen corresponding path program 29 times [2019-11-23 20:10:35,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:35,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417615081] [2019-11-23 20:10:35,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:10:36,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417615081] [2019-11-23 20:10:36,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148797086] [2019-11-23 20:10:36,061 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 [2019-11-23 20:10:48,608 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-23 20:10:48,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:48,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:10:48,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:48,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1067 trivial. 0 not checked. [2019-11-23 20:10:48,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:48,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-11-23 20:10:48,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116467671] [2019-11-23 20:10:48,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:10:48,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:48,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:10:48,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:10:48,810 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand 42 states. [2019-11-23 20:10:49,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:49,165 INFO L93 Difference]: Finished difference Result 243 states and 254 transitions. [2019-11-23 20:10:49,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:10:49,165 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 145 [2019-11-23 20:10:49,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:49,167 INFO L225 Difference]: With dead ends: 243 [2019-11-23 20:10:49,167 INFO L226 Difference]: Without dead ends: 158 [2019-11-23 20:10:49,168 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:10:49,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-11-23 20:10:49,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2019-11-23 20:10:49,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-11-23 20:10:49,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2019-11-23 20:10:49,174 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 145 [2019-11-23 20:10:49,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:49,175 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2019-11-23 20:10:49,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:10:49,175 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2019-11-23 20:10:49,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-23 20:10:49,177 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:49,177 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 10, 10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:49,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:49,378 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:49,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:49,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1390925180, now seen corresponding path program 30 times [2019-11-23 20:10:49,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:49,379 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323573165] [2019-11-23 20:10:49,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2019-11-23 20:10:50,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323573165] [2019-11-23 20:10:50,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686659624] [2019-11-23 20:10:50,043 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 [2019-11-23 20:10:51,847 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-23 20:10:51,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:51,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:10:51,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2019-11-23 20:10:52,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:52,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 11] total 42 [2019-11-23 20:10:52,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662171605] [2019-11-23 20:10:52,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:10:52,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:52,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:10:52,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=582, Invalid=1140, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:10:52,072 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 42 states. [2019-11-23 20:10:52,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:52,245 INFO L93 Difference]: Finished difference Result 251 states and 260 transitions. [2019-11-23 20:10:52,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:10:52,246 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 153 [2019-11-23 20:10:52,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:52,248 INFO L225 Difference]: With dead ends: 251 [2019-11-23 20:10:52,248 INFO L226 Difference]: Without dead ends: 160 [2019-11-23 20:10:52,249 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=582, Invalid=1140, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:10:52,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-23 20:10:52,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2019-11-23 20:10:52,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-11-23 20:10:52,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2019-11-23 20:10:52,256 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 153 [2019-11-23 20:10:52,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:52,257 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2019-11-23 20:10:52,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:10:52,257 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2019-11-23 20:10:52,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-23 20:10:52,258 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:52,258 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:52,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:52,463 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:52,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:52,464 INFO L82 PathProgramCache]: Analyzing trace with hash 674927040, now seen corresponding path program 31 times [2019-11-23 20:10:52,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:52,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541518836] [2019-11-23 20:10:52,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1342 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:10:53,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541518836] [2019-11-23 20:10:53,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87963294] [2019-11-23 20:10:53,229 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 [2019-11-23 20:10:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:53,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:10:53,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1342 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:10:53,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:53,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 20:10:53,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97199920] [2019-11-23 20:10:53,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:10:53,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:53,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:10:53,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:10:53,366 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand 35 states. [2019-11-23 20:10:53,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:53,487 INFO L93 Difference]: Finished difference Result 254 states and 262 transitions. [2019-11-23 20:10:53,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:10:53,488 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 157 [2019-11-23 20:10:53,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:53,489 INFO L225 Difference]: With dead ends: 254 [2019-11-23 20:10:53,489 INFO L226 Difference]: Without dead ends: 161 [2019-11-23 20:10:53,490 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:10:53,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-23 20:10:53,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2019-11-23 20:10:53,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-23 20:10:53,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2019-11-23 20:10:53,494 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 157 [2019-11-23 20:10:53,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:53,495 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2019-11-23 20:10:53,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:10:53,495 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2019-11-23 20:10:53,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 20:10:53,496 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:53,496 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:53,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:53,700 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:53,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:53,700 INFO L82 PathProgramCache]: Analyzing trace with hash -629222402, now seen corresponding path program 32 times [2019-11-23 20:10:53,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:53,701 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551634972] [2019-11-23 20:10:53,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:10:54,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551634972] [2019-11-23 20:10:54,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576524450] [2019-11-23 20:10:54,208 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 [2019-11-23 20:10:54,297 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:10:54,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:54,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:10:54,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:10:54,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:54,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:10:54,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435852785] [2019-11-23 20:10:54,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:10:54,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:54,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:10:54,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:10:54,332 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 36 states. [2019-11-23 20:10:54,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:54,451 INFO L93 Difference]: Finished difference Result 256 states and 264 transitions. [2019-11-23 20:10:54,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:10:54,452 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 159 [2019-11-23 20:10:54,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:54,453 INFO L225 Difference]: With dead ends: 256 [2019-11-23 20:10:54,453 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:10:54,454 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:10:54,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:10:54,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2019-11-23 20:10:54,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-23 20:10:54,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2019-11-23 20:10:54,458 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 159 [2019-11-23 20:10:54,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:54,458 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2019-11-23 20:10:54,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:10:54,458 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2019-11-23 20:10:54,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-23 20:10:54,459 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:54,459 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:54,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:54,662 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:54,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:54,663 INFO L82 PathProgramCache]: Analyzing trace with hash 213614268, now seen corresponding path program 33 times [2019-11-23 20:10:54,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:54,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393802624] [2019-11-23 20:10:54,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:10:55,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393802624] [2019-11-23 20:10:55,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143710368] [2019-11-23 20:10:55,276 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 [2019-11-23 20:10:55,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 20:10:55,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:55,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:10:55,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:55,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1389 trivial. 0 not checked. [2019-11-23 20:10:55,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:55,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 12] total 46 [2019-11-23 20:10:55,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712358100] [2019-11-23 20:10:55,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 20:10:55,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:55,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 20:10:55,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=695, Invalid=1375, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:10:55,711 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 46 states. [2019-11-23 20:10:55,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:55,940 INFO L93 Difference]: Finished difference Result 261 states and 270 transitions. [2019-11-23 20:10:55,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-23 20:10:55,942 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 161 [2019-11-23 20:10:55,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:55,943 INFO L225 Difference]: With dead ends: 261 [2019-11-23 20:10:55,943 INFO L226 Difference]: Without dead ends: 168 [2019-11-23 20:10:55,944 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=695, Invalid=1375, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:10:55,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-11-23 20:10:55,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2019-11-23 20:10:55,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-11-23 20:10:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2019-11-23 20:10:55,949 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 161 [2019-11-23 20:10:55,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:55,949 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2019-11-23 20:10:55,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 20:10:55,949 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2019-11-23 20:10:55,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-23 20:10:55,950 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:55,950 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:56,151 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:56,151 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:56,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:56,152 INFO L82 PathProgramCache]: Analyzing trace with hash 811276792, now seen corresponding path program 34 times [2019-11-23 20:10:56,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:56,152 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673724875] [2019-11-23 20:10:56,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1556 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:10:56,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673724875] [2019-11-23 20:10:56,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506958175] [2019-11-23 20:10:56,860 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 [2019-11-23 20:10:56,964 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:10:56,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:10:56,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:10:56,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:10:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1556 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1456 trivial. 0 not checked. [2019-11-23 20:10:57,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:10:57,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 13] total 48 [2019-11-23 20:10:57,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201755689] [2019-11-23 20:10:57,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-23 20:10:57,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:10:57,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-23 20:10:57,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=1513, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:10:57,239 INFO L87 Difference]: Start difference. First operand 166 states and 170 transitions. Second operand 48 states. [2019-11-23 20:10:57,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:10:57,499 INFO L93 Difference]: Finished difference Result 273 states and 284 transitions. [2019-11-23 20:10:57,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-23 20:10:57,500 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 165 [2019-11-23 20:10:57,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:10:57,501 INFO L225 Difference]: With dead ends: 273 [2019-11-23 20:10:57,502 INFO L226 Difference]: Without dead ends: 178 [2019-11-23 20:10:57,503 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=1513, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:10:57,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-11-23 20:10:57,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2019-11-23 20:10:57,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-11-23 20:10:57,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2019-11-23 20:10:57,508 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 165 [2019-11-23 20:10:57,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:10:57,508 INFO L462 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2019-11-23 20:10:57,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-23 20:10:57,509 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2019-11-23 20:10:57,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-23 20:10:57,510 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:10:57,510 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:10:57,713 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:10:57,714 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:10:57,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:10:57,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1334735180, now seen corresponding path program 35 times [2019-11-23 20:10:57,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:10:57,715 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965193924] [2019-11-23 20:10:57,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:10:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:10:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1688 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2019-11-23 20:10:58,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965193924] [2019-11-23 20:10:58,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278804868] [2019-11-23 20:10:58,333 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