/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_copy5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:23:46,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:23:46,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:23:46,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:23:46,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:23:46,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:23:46,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:23:46,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:23:46,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:23:46,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:23:46,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:23:46,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:23:46,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:23:46,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:23:46,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:23:46,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:23:46,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:23:46,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:23:46,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:23:46,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:23:46,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:23:46,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:23:46,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:23:46,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:23:46,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:23:46,957 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:23:46,958 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:23:46,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:23:46,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:23:46,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:23:46,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:23:46,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:23:46,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:23:46,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:23:46,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:23:46,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:23:46,965 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 20:23:46,979 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:23:46,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:23:46,980 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:23:46,981 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:23:46,981 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:23:46,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:23:46,981 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:23:46,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:23:46,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:23:46,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:23:46,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:23:46,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:23:46,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:23:46,983 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:23:46,983 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:23:46,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:23:46,983 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:23:46,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:23:46,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:23:46,984 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:23:46,984 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:23:46,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:23:46,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:23:46,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:23:46,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:23:46,985 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:23:46,985 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:23:46,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:23:46,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:23:46,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:23:47,254 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:23:47,269 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:23:47,273 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:23:47,275 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:23:47,275 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:23:47,277 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2019-11-23 20:23:47,360 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60a7fda62/8501f96c05b1473692cc28d14765a051/FLAG5bbe35459 [2019-11-23 20:23:47,830 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:23:47,831 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2019-11-23 20:23:47,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60a7fda62/8501f96c05b1473692cc28d14765a051/FLAG5bbe35459 [2019-11-23 20:23:48,231 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60a7fda62/8501f96c05b1473692cc28d14765a051 [2019-11-23 20:23:48,241 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:23:48,243 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:23:48,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:23:48,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:23:48,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:23:48,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:23:48" (1/1) ... [2019-11-23 20:23:48,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cddf010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:48, skipping insertion in model container [2019-11-23 20:23:48,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:23:48" (1/1) ... [2019-11-23 20:23:48,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:23:48,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:23:48,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:23:48,487 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:23:48,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:23:48,533 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:23:48,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:48 WrapperNode [2019-11-23 20:23:48,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:23:48,535 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:23:48,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:23:48,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:23:48,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:48" (1/1) ... [2019-11-23 20:23:48,635 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:48" (1/1) ... [2019-11-23 20:23:48,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:23:48,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:23:48,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:23:48,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:23:48,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:48" (1/1) ... [2019-11-23 20:23:48,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:48" (1/1) ... [2019-11-23 20:23:48,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:48" (1/1) ... [2019-11-23 20:23:48,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:48" (1/1) ... [2019-11-23 20:23:48,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:48" (1/1) ... [2019-11-23 20:23:48,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:48" (1/1) ... [2019-11-23 20:23:48,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:48" (1/1) ... [2019-11-23 20:23:48,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:23:48,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:23:48,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:23:48,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:23:48,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:48" (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 20:23:48,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:23:48,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:23:48,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:23:48,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:23:48,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:23:48,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:23:49,137 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:23:49,137 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-23 20:23:49,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:23:49 BoogieIcfgContainer [2019-11-23 20:23:49,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:23:49,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:23:49,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:23:49,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:23:49,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:23:48" (1/3) ... [2019-11-23 20:23:49,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@199bea8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:23:49, skipping insertion in model container [2019-11-23 20:23:49,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:23:48" (2/3) ... [2019-11-23 20:23:49,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@199bea8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:23:49, skipping insertion in model container [2019-11-23 20:23:49,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:23:49" (3/3) ... [2019-11-23 20:23:49,147 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.i [2019-11-23 20:23:49,160 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:23:49,167 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:23:49,192 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:23:49,213 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:23:49,214 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:23:49,214 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:23:49,214 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:23:49,214 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:23:49,214 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:23:49,215 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:23:49,215 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:23:49,231 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-11-23 20:23:49,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:23:49,237 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:49,238 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 20:23:49,239 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:49,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:49,248 INFO L82 PathProgramCache]: Analyzing trace with hash -18882701, now seen corresponding path program 1 times [2019-11-23 20:23:49,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:49,258 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121847390] [2019-11-23 20:23:49,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:49,430 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 20:23:49,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121847390] [2019-11-23 20:23:49,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:23:49,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:23:49,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428554904] [2019-11-23 20:23:49,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:23:49,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:49,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:23:49,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:23:49,451 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2019-11-23 20:23:49,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:49,493 INFO L93 Difference]: Finished difference Result 58 states and 86 transitions. [2019-11-23 20:23:49,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:23:49,495 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 20:23:49,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:49,503 INFO L225 Difference]: With dead ends: 58 [2019-11-23 20:23:49,503 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:23:49,507 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 20:23:49,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:23:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-23 20:23:49,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:23:49,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2019-11-23 20:23:49,546 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2019-11-23 20:23:49,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:49,546 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2019-11-23 20:23:49,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:23:49,547 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2019-11-23 20:23:49,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:23:49,548 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:49,548 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 20:23:49,549 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:49,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:49,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1592499797, now seen corresponding path program 1 times [2019-11-23 20:23:49,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:49,550 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399726723] [2019-11-23 20:23:49,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:49,605 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 20:23:49,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399726723] [2019-11-23 20:23:49,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:23:49,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:23:49,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367777497] [2019-11-23 20:23:49,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:23:49,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:49,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:23:49,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:23:49,610 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 3 states. [2019-11-23 20:23:49,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:49,739 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2019-11-23 20:23:49,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:23:49,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 20:23:49,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:49,741 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:23:49,741 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 20:23:49,743 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 20:23:49,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 20:23:49,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2019-11-23 20:23:49,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:23:49,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-11-23 20:23:49,750 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2019-11-23 20:23:49,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:49,751 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-11-23 20:23:49,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:23:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-11-23 20:23:49,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:23:49,752 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:49,752 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, 1, 1] [2019-11-23 20:23:49,753 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:49,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:49,753 INFO L82 PathProgramCache]: Analyzing trace with hash 722749857, now seen corresponding path program 1 times [2019-11-23 20:23:49,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:49,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498985007] [2019-11-23 20:23:49,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:49,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:23:49,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498985007] [2019-11-23 20:23:49,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552555962] [2019-11-23 20:23:49,900 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 20:23:49,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:49,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:23:49,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:23:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:23:50,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:23:50,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:23:50,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45068157] [2019-11-23 20:23:50,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:23:50,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:50,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:23:50,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:23:50,031 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 5 states. [2019-11-23 20:23:50,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:50,063 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2019-11-23 20:23:50,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:23:50,064 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2019-11-23 20:23:50,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:50,066 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:23:50,073 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:23:50,074 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 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 20:23:50,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:23:50,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-11-23 20:23:50,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:23:50,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-11-23 20:23:50,086 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 29 [2019-11-23 20:23:50,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:50,087 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-11-23 20:23:50,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:23:50,087 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-11-23 20:23:50,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:23:50,089 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:50,090 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, 1, 1] [2019-11-23 20:23:50,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:23:50,295 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:50,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:50,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1187353633, now seen corresponding path program 2 times [2019-11-23 20:23:50,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:50,297 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733182998] [2019-11-23 20:23:50,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:23:50,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733182998] [2019-11-23 20:23:50,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17160464] [2019-11-23 20:23:50,437 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 20:23:50,525 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:23:50,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:23:50,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:23:50,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:23:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:23:50,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:23:50,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2019-11-23 20:23:50,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520201575] [2019-11-23 20:23:50,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:23:50,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:50,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:23:50,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:23:50,569 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 7 states. [2019-11-23 20:23:50,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:50,720 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2019-11-23 20:23:50,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:23:50,720 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-11-23 20:23:50,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:50,721 INFO L225 Difference]: With dead ends: 79 [2019-11-23 20:23:50,721 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:23:50,722 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:23:50,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:23:50,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2019-11-23 20:23:50,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:23:50,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2019-11-23 20:23:50,730 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 31 [2019-11-23 20:23:50,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:50,730 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2019-11-23 20:23:50,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:23:50,730 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2019-11-23 20:23:50,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:23:50,732 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:50,732 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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 20:23:50,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:23:50,937 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:50,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:50,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1347184621, now seen corresponding path program 3 times [2019-11-23 20:23:50,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:50,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066130780] [2019-11-23 20:23:50,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:23:51,088 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066130780] [2019-11-23 20:23:51,088 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162167801] [2019-11-23 20:23:51,089 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 20:23:51,158 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:23:51,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:23:51,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:23:51,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:23:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:23:51,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:23:51,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:23:51,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044798694] [2019-11-23 20:23:51,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:23:51,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:51,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:23:51,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:23:51,179 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 6 states. [2019-11-23 20:23:51,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:51,287 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2019-11-23 20:23:51,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:23:51,288 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2019-11-23 20:23:51,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:51,289 INFO L225 Difference]: With dead ends: 92 [2019-11-23 20:23:51,289 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:23:51,290 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:23:51,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:23:51,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2019-11-23 20:23:51,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:23:51,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2019-11-23 20:23:51,298 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 43 [2019-11-23 20:23:51,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:51,298 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2019-11-23 20:23:51,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:23:51,299 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2019-11-23 20:23:51,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:23:51,300 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:51,300 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:23:51,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:23:51,513 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:51,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:51,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1175577079, now seen corresponding path program 4 times [2019-11-23 20:23:51,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:51,514 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729844971] [2019-11-23 20:23:51,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-23 20:23:51,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729844971] [2019-11-23 20:23:51,695 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565395093] [2019-11-23 20:23:51,695 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 20:23:51,775 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:23:51,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:23:51,777 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:23:51,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:23:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-23 20:23:51,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:23:51,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-23 20:23:51,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659150258] [2019-11-23 20:23:51,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:23:51,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:23:51,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:23:51,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:23:51,829 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 10 states. [2019-11-23 20:23:52,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:23:52,045 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2019-11-23 20:23:52,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:23:52,046 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2019-11-23 20:23:52,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:23:52,047 INFO L225 Difference]: With dead ends: 121 [2019-11-23 20:23:52,047 INFO L226 Difference]: Without dead ends: 74 [2019-11-23 20:23:52,048 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:23:52,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-23 20:23:52,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2019-11-23 20:23:52,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 20:23:52,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2019-11-23 20:23:52,070 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 53 [2019-11-23 20:23:52,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:23:52,071 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2019-11-23 20:23:52,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:23:52,071 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2019-11-23 20:23:52,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:23:52,074 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:23:52,080 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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 20:23:52,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:23:52,284 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:23:52,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:23:52,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1497430845, now seen corresponding path program 5 times [2019-11-23 20:23:52,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:23:52,285 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538051514] [2019-11-23 20:23:52,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:23:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:23:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-23 20:23:52,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538051514] [2019-11-23 20:23:52,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274997974] [2019-11-23 20:23:52,496 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