/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-examples/standard_copy3_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:22:02,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:22:02,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:22:02,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:22:02,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:22:02,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:22:02,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:22:02,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:22:02,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:22:02,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:22:02,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:22:02,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:22:02,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:22:02,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:22:02,969 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:22:02,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:22:02,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:22:02,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:22:02,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:22:02,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:22:02,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:22:02,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:22:02,988 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:22:02,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:22:02,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:22:02,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:22:02,994 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:22:02,995 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:22:02,996 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:22:02,996 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:22:02,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:22:02,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:22:02,997 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:22:02,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:22:02,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:22:02,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:22:03,000 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 20:22:03,013 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:22:03,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:22:03,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:22:03,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:22:03,015 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:22:03,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:22:03,015 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:22:03,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:22:03,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:22:03,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:22:03,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:22:03,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:22:03,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:22:03,016 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:22:03,017 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:22:03,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:22:03,017 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:22:03,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:22:03,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:22:03,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:22:03,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:22:03,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:22:03,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:22:03,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:22:03,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:22:03,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:22:03,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:22:03,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:22:03,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:22:03,019 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:22:03,322 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:22:03,339 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:22:03,345 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:22:03,347 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:22:03,347 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:22:03,348 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-2.i [2019-11-23 20:22:03,424 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d51293f9/ad6f55130df9473cb8087245b3374836/FLAG7132f7307 [2019-11-23 20:22:03,882 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:22:03,883 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy3_ground-2.i [2019-11-23 20:22:03,889 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d51293f9/ad6f55130df9473cb8087245b3374836/FLAG7132f7307 [2019-11-23 20:22:04,239 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d51293f9/ad6f55130df9473cb8087245b3374836 [2019-11-23 20:22:04,247 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:22:04,249 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:22:04,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:22:04,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:22:04,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:22:04,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:22:04" (1/1) ... [2019-11-23 20:22:04,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50d8116d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:04, skipping insertion in model container [2019-11-23 20:22:04,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:22:04" (1/1) ... [2019-11-23 20:22:04,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:22:04,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:22:04,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:22:04,471 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:22:04,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:22:04,510 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:22:04,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:04 WrapperNode [2019-11-23 20:22:04,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:22:04,512 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:22:04,512 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:22:04,512 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:22:04,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:04" (1/1) ... [2019-11-23 20:22:04,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:04" (1/1) ... [2019-11-23 20:22:04,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:22:04,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:22:04,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:22:04,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:22:04,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:04" (1/1) ... [2019-11-23 20:22:04,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:04" (1/1) ... [2019-11-23 20:22:04,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:04" (1/1) ... [2019-11-23 20:22:04,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:04" (1/1) ... [2019-11-23 20:22:04,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:04" (1/1) ... [2019-11-23 20:22:04,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:04" (1/1) ... [2019-11-23 20:22:04,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:04" (1/1) ... [2019-11-23 20:22:04,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:22:04,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:22:04,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:22:04,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:22:04,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:04" (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 20:22:04,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:22:04,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:22:04,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:22:04,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:22:04,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:22:04,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:22:04,983 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:22:04,984 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 20:22:04,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:22:04 BoogieIcfgContainer [2019-11-23 20:22:04,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:22:04,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:22:04,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:22:04,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:22:04,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:22:04" (1/3) ... [2019-11-23 20:22:04,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca63ff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:22:04, skipping insertion in model container [2019-11-23 20:22:04,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:04" (2/3) ... [2019-11-23 20:22:04,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca63ff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:22:04, skipping insertion in model container [2019-11-23 20:22:04,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:22:04" (3/3) ... [2019-11-23 20:22:04,993 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-2.i [2019-11-23 20:22:05,008 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:22:05,018 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:22:05,033 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:22:05,066 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:22:05,066 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:22:05,067 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:22:05,067 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:22:05,067 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:22:05,067 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:22:05,067 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:22:05,068 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:22:05,087 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-11-23 20:22:05,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:22:05,095 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:05,096 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:05,096 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:05,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:05,103 INFO L82 PathProgramCache]: Analyzing trace with hash -2053894623, now seen corresponding path program 1 times [2019-11-23 20:22:05,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:05,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369981096] [2019-11-23 20:22:05,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:05,277 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 20:22:05,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369981096] [2019-11-23 20:22:05,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:22:05,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:22:05,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412059167] [2019-11-23 20:22:05,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:22:05,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:05,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:22:05,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:22:05,310 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-11-23 20:22:05,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:05,356 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2019-11-23 20:22:05,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:22:05,358 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-23 20:22:05,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:05,370 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:22:05,370 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 20:22:05,374 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 20:22:05,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 20:22:05,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-11-23 20:22:05,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:22:05,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-23 20:22:05,407 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2019-11-23 20:22:05,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:05,408 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-23 20:22:05,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:22:05,408 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-23 20:22:05,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:22:05,409 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:05,410 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:05,410 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:05,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:05,411 INFO L82 PathProgramCache]: Analyzing trace with hash -418223009, now seen corresponding path program 1 times [2019-11-23 20:22:05,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:05,411 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22933380] [2019-11-23 20:22:05,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:05,487 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 20:22:05,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22933380] [2019-11-23 20:22:05,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:22:05,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:22:05,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138369908] [2019-11-23 20:22:05,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:22:05,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:05,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:22:05,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:22:05,492 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-11-23 20:22:05,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:05,541 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2019-11-23 20:22:05,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:22:05,542 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-23 20:22:05,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:05,543 INFO L225 Difference]: With dead ends: 40 [2019-11-23 20:22:05,543 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:22:05,545 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 20:22:05,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:22:05,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2019-11-23 20:22:05,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:22:05,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 20:22:05,551 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2019-11-23 20:22:05,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:05,551 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 20:22:05,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:22:05,551 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 20:22:05,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:22:05,552 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:05,552 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] [2019-11-23 20:22:05,553 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:05,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:05,553 INFO L82 PathProgramCache]: Analyzing trace with hash 241580185, now seen corresponding path program 1 times [2019-11-23 20:22:05,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:05,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595355692] [2019-11-23 20:22:05,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:22:05,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595355692] [2019-11-23 20:22:05,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739703012] [2019-11-23 20:22:05,654 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 20:22:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:05,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:22:05,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:22:05,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:05,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:22:05,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227317724] [2019-11-23 20:22:05,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:22:05,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:05,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:22:05,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:22:05,774 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 5 states. [2019-11-23 20:22:05,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:05,808 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-23 20:22:05,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:22:05,809 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-11-23 20:22:05,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:05,809 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:22:05,810 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:22:05,811 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 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 20:22:05,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:22:05,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-11-23 20:22:05,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:22:05,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-23 20:22:05,823 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2019-11-23 20:22:05,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:05,823 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-23 20:22:05,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:22:05,823 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-23 20:22:05,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:22:05,826 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:05,826 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] [2019-11-23 20:22:06,030 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:06,030 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:06,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:06,031 INFO L82 PathProgramCache]: Analyzing trace with hash 456751319, now seen corresponding path program 2 times [2019-11-23 20:22:06,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:06,031 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489546382] [2019-11-23 20:22:06,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:22:06,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489546382] [2019-11-23 20:22:06,142 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837639684] [2019-11-23 20:22:06,142 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 20:22:06,198 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:22:06,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:06,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:22:06,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:22:06,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:06,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:22:06,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736543007] [2019-11-23 20:22:06,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:22:06,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:06,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:22:06,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:22:06,226 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2019-11-23 20:22:06,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:06,353 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2019-11-23 20:22:06,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:22:06,354 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2019-11-23 20:22:06,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:06,355 INFO L225 Difference]: With dead ends: 57 [2019-11-23 20:22:06,355 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 20:22:06,356 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 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 20:22:06,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 20:22:06,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2019-11-23 20:22:06,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:22:06,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 20:22:06,362 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2019-11-23 20:22:06,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:06,363 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 20:22:06,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:22:06,363 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 20:22:06,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:22:06,364 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:06,364 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:06,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:06,565 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:06,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:06,566 INFO L82 PathProgramCache]: Analyzing trace with hash 391245135, now seen corresponding path program 3 times [2019-11-23 20:22:06,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:06,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408544773] [2019-11-23 20:22:06,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:22:06,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408544773] [2019-11-23 20:22:06,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951559137] [2019-11-23 20:22:06,665 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 20:22:06,724 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:22:06,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:06,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:22:06,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 20:22:06,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:06,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-11-23 20:22:06,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818458965] [2019-11-23 20:22:06,772 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:22:06,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:06,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:22:06,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:22:06,773 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2019-11-23 20:22:06,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:06,893 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 20:22:06,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:22:06,894 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2019-11-23 20:22:06,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:06,895 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:22:06,895 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:22:06,896 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:22:06,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:22:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 20:22:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:22:06,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 20:22:06,902 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 31 [2019-11-23 20:22:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:06,903 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 20:22:06,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:22:06,903 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 20:22:06,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:22:06,904 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:06,905 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:07,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:07,109 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:07,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:07,109 INFO L82 PathProgramCache]: Analyzing trace with hash -188495417, now seen corresponding path program 4 times [2019-11-23 20:22:07,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:07,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464889782] [2019-11-23 20:22:07,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-23 20:22:07,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464889782] [2019-11-23 20:22:07,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818762126] [2019-11-23 20:22:07,244 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 20:22:07,311 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:22:07,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:07,313 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:22:07,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-23 20:22:07,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:07,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-11-23 20:22:07,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489005846] [2019-11-23 20:22:07,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:22:07,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:07,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:22:07,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:22:07,378 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 11 states. [2019-11-23 20:22:07,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:07,531 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-11-23 20:22:07,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:22:07,531 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2019-11-23 20:22:07,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:07,532 INFO L225 Difference]: With dead ends: 85 [2019-11-23 20:22:07,532 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:22:07,533 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:22:07,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:22:07,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-11-23 20:22:07,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:22:07,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-23 20:22:07,540 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 39 [2019-11-23 20:22:07,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:07,541 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-23 20:22:07,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:22:07,541 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-23 20:22:07,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:22:07,542 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:07,542 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:07,743 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:07,743 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:07,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:07,744 INFO L82 PathProgramCache]: Analyzing trace with hash -688452033, now seen corresponding path program 5 times [2019-11-23 20:22:07,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:07,744 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734901617] [2019-11-23 20:22:07,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:22:07,909 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734901617] [2019-11-23 20:22:07,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332832538] [2019-11-23 20:22:07,910 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 20:22:11,571 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:22:11,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:11,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:22:11,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:11,668 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:22:11,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:11,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-11-23 20:22:11,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795980270] [2019-11-23 20:22:11,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:22:11,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:11,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:22:11,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:22:11,672 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 13 states. [2019-11-23 20:22:11,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:11,843 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2019-11-23 20:22:11,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:22:11,843 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2019-11-23 20:22:11,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:11,844 INFO L225 Difference]: With dead ends: 99 [2019-11-23 20:22:11,844 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:22:11,845 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:22:11,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:22:11,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 20:22:11,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:22:11,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 20:22:11,859 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 47 [2019-11-23 20:22:11,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:11,859 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 20:22:11,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:22:11,859 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 20:22:11,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:22:11,863 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:11,864 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:12,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:12,065 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:12,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:12,065 INFO L82 PathProgramCache]: Analyzing trace with hash -346834249, now seen corresponding path program 6 times [2019-11-23 20:22:12,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:12,066 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983159328] [2019-11-23 20:22:12,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 20:22:12,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983159328] [2019-11-23 20:22:12,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823861314] [2019-11-23 20:22:12,189 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 20:22:12,723 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:22:12,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:12,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:22:12,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-11-23 20:22:12,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:12,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-11-23 20:22:12,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114653640] [2019-11-23 20:22:12,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:22:12,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:12,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:22:12,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:22:12,805 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 15 states. [2019-11-23 20:22:12,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:12,958 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2019-11-23 20:22:12,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:22:12,958 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2019-11-23 20:22:12,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:12,959 INFO L225 Difference]: With dead ends: 113 [2019-11-23 20:22:12,959 INFO L226 Difference]: Without dead ends: 70 [2019-11-23 20:22:12,960 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:22:12,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-23 20:22:12,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2019-11-23 20:22:12,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:22:12,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 20:22:12,967 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 55 [2019-11-23 20:22:12,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:12,968 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 20:22:12,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:22:12,968 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 20:22:12,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:22:12,969 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:12,969 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:13,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:13,176 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:13,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:13,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1765920559, now seen corresponding path program 7 times [2019-11-23 20:22:13,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:13,177 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36272931] [2019-11-23 20:22:13,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-23 20:22:13,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36272931] [2019-11-23 20:22:13,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156336468] [2019-11-23 20:22:13,361 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 20:22:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:13,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:22:13,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-23 20:22:13,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:13,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:22:13,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732009517] [2019-11-23 20:22:13,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:22:13,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:13,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:22:13,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:22:13,457 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 11 states. [2019-11-23 20:22:13,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:13,493 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-11-23 20:22:13,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:22:13,494 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 63 [2019-11-23 20:22:13,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:13,495 INFO L225 Difference]: With dead ends: 118 [2019-11-23 20:22:13,495 INFO L226 Difference]: Without dead ends: 69 [2019-11-23 20:22:13,496 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 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 20:22:13,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-23 20:22:13,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-11-23 20:22:13,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 20:22:13,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2019-11-23 20:22:13,502 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 63 [2019-11-23 20:22:13,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:13,503 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2019-11-23 20:22:13,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:22:13,503 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2019-11-23 20:22:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:22:13,504 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:13,504 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:13,716 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:13,717 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:13,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:13,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1612848659, now seen corresponding path program 8 times [2019-11-23 20:22:13,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:13,718 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489818151] [2019-11-23 20:22:13,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-23 20:22:13,863 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489818151] [2019-11-23 20:22:13,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357741935] [2019-11-23 20:22:13,864 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 20:22:13,937 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:22:13,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:13,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:22:13,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-23 20:22:13,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:13,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:22:13,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660960221] [2019-11-23 20:22:13,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:22:13,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:13,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:22:13,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:22:13,988 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 12 states. [2019-11-23 20:22:14,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:14,034 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2019-11-23 20:22:14,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:22:14,037 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2019-11-23 20:22:14,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:14,038 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:22:14,038 INFO L226 Difference]: Without dead ends: 71 [2019-11-23 20:22:14,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 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 20:22:14,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-23 20:22:14,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2019-11-23 20:22:14,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:22:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-11-23 20:22:14,052 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 65 [2019-11-23 20:22:14,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:14,052 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-11-23 20:22:14,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:22:14,052 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-11-23 20:22:14,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 20:22:14,054 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:14,054 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:14,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:14,267 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:14,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:14,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1614791381, now seen corresponding path program 9 times [2019-11-23 20:22:14,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:14,268 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646887427] [2019-11-23 20:22:14,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-23 20:22:14,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646887427] [2019-11-23 20:22:14,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110669034] [2019-11-23 20:22:14,419 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 20:22:15,820 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 20:22:15,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:15,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:22:15,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2019-11-23 20:22:15,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:15,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2019-11-23 20:22:15,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692706417] [2019-11-23 20:22:15,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:22:15,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:15,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:22:15,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:22:15,972 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 21 states. [2019-11-23 20:22:16,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:16,232 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2019-11-23 20:22:16,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:22:16,233 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 67 [2019-11-23 20:22:16,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:16,234 INFO L225 Difference]: With dead ends: 134 [2019-11-23 20:22:16,234 INFO L226 Difference]: Without dead ends: 85 [2019-11-23 20:22:16,235 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:22:16,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-23 20:22:16,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2019-11-23 20:22:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:22:16,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2019-11-23 20:22:16,243 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 67 [2019-11-23 20:22:16,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:16,243 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2019-11-23 20:22:16,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:22:16,243 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2019-11-23 20:22:16,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:22:16,248 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:16,248 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:16,448 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:16,449 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:16,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:16,449 INFO L82 PathProgramCache]: Analyzing trace with hash -4389155, now seen corresponding path program 10 times [2019-11-23 20:22:16,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:16,450 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927807632] [2019-11-23 20:22:16,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-23 20:22:16,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927807632] [2019-11-23 20:22:16,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878781988] [2019-11-23 20:22:16,601 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 20:22:16,679 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:22:16,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:16,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:22:16,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2019-11-23 20:22:16,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:16,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2019-11-23 20:22:16,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961949388] [2019-11-23 20:22:16,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:22:16,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:16,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:22:16,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:22:16,824 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 22 states. [2019-11-23 20:22:17,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:17,042 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2019-11-23 20:22:17,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:22:17,043 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 81 [2019-11-23 20:22:17,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:17,044 INFO L225 Difference]: With dead ends: 157 [2019-11-23 20:22:17,044 INFO L226 Difference]: Without dead ends: 96 [2019-11-23 20:22:17,045 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:22:17,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-23 20:22:17,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2019-11-23 20:22:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 20:22:17,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2019-11-23 20:22:17,052 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 81 [2019-11-23 20:22:17,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:17,053 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2019-11-23 20:22:17,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:22:17,053 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2019-11-23 20:22:17,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-23 20:22:17,054 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:17,069 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:17,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:17,281 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:17,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:17,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1067207339, now seen corresponding path program 11 times [2019-11-23 20:22:17,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:17,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868453716] [2019-11-23 20:22:17,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-11-23 20:22:17,422 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868453716] [2019-11-23 20:22:17,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870089972] [2019-11-23 20:22:17,423 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