/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_running-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:33:17,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:33:17,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:33:17,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:33:17,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:33:17,926 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:33:17,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:33:17,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:33:17,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:33:17,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:33:17,938 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:33:17,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:33:17,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:33:17,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:33:17,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:33:17,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:33:17,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:33:17,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:33:17,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:33:17,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:33:17,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:33:17,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:33:17,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:33:17,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:33:17,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 20:33:17,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 20:33:17,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 20:33:17,961 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 20:33:17,961 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 20:33:17,962 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 20:33:17,962 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:33:17,963 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:33:17,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:33:17,965 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:33:17,966 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:33:17,966 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:33:17,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:33:17,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:33:17,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:33:17,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:33:17,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:33:17,970 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 20:33:17,983 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:33:17,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:33:17,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:33:17,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:33:17,985 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:33:17,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:33:17,986 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:33:17,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:33:17,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:33:17,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:33:17,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:33:17,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:33:17,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:33:17,987 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:33:17,987 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:33:17,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:33:17,988 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:33:17,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:33:17,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:33:17,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:33:17,988 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:33:17,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:33:17,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:33:17,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:33:17,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:33:17,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:33:17,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:33:17,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:33:17,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:33:17,990 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:33:18,253 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:33:18,263 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:33:18,267 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:33:18,268 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:33:18,268 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:33:18,270 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_running-1.i [2019-11-23 20:33:18,349 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65a1efcd2/895fb15dce2740d5be645dec34f5733e/FLAGcdd6135b2 [2019-11-23 20:33:18,850 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:33:18,851 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_running-1.i [2019-11-23 20:33:18,858 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65a1efcd2/895fb15dce2740d5be645dec34f5733e/FLAGcdd6135b2 [2019-11-23 20:33:19,199 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65a1efcd2/895fb15dce2740d5be645dec34f5733e [2019-11-23 20:33:19,210 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:33:19,211 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:33:19,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:33:19,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:33:19,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:33:19,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:19" (1/1) ... [2019-11-23 20:33:19,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e7419ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:19, skipping insertion in model container [2019-11-23 20:33:19,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:19" (1/1) ... [2019-11-23 20:33:19,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:33:19,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:33:19,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:33:19,451 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:33:19,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:33:19,492 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:33:19,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:19 WrapperNode [2019-11-23 20:33:19,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:33:19,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:33:19,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:33:19,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:33:19,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:19" (1/1) ... [2019-11-23 20:33:19,585 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:19" (1/1) ... [2019-11-23 20:33:19,607 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:33:19,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:33:19,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:33:19,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:33:19,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:19" (1/1) ... [2019-11-23 20:33:19,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:19" (1/1) ... [2019-11-23 20:33:19,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:19" (1/1) ... [2019-11-23 20:33:19,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:19" (1/1) ... [2019-11-23 20:33:19,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:19" (1/1) ... [2019-11-23 20:33:19,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:19" (1/1) ... [2019-11-23 20:33:19,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:19" (1/1) ... [2019-11-23 20:33:19,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:33:19,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:33:19,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:33:19,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:33:19,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:19" (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 20:33:19,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:33:19,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:33:19,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:33:19,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:33:19,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:33:19,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:33:20,011 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:33:20,012 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:33:20,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:20 BoogieIcfgContainer [2019-11-23 20:33:20,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:33:20,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:33:20,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:33:20,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:33:20,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:33:19" (1/3) ... [2019-11-23 20:33:20,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b92580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:20, skipping insertion in model container [2019-11-23 20:33:20,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:19" (2/3) ... [2019-11-23 20:33:20,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b92580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:20, skipping insertion in model container [2019-11-23 20:33:20,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:20" (3/3) ... [2019-11-23 20:33:20,021 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_running-1.i [2019-11-23 20:33:20,032 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:33:20,040 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:33:20,052 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:33:20,079 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:33:20,080 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:33:20,080 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:33:20,080 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:33:20,080 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:33:20,080 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:33:20,080 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:33:20,081 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:33:20,098 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-11-23 20:33:20,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:33:20,105 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:20,106 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:20,106 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:20,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:20,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2030235279, now seen corresponding path program 1 times [2019-11-23 20:33:20,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:20,123 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879236887] [2019-11-23 20:33:20,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:20,286 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 20:33:20,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879236887] [2019-11-23 20:33:20,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:33:20,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:33:20,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786959183] [2019-11-23 20:33:20,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:33:20,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:20,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:33:20,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:33:20,316 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2019-11-23 20:33:20,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:20,342 INFO L93 Difference]: Finished difference Result 44 states and 64 transitions. [2019-11-23 20:33:20,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:33:20,344 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-23 20:33:20,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:20,357 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:33:20,358 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:33:20,366 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:33:20,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:33:20,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-23 20:33:20,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:33:20,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2019-11-23 20:33:20,417 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 10 [2019-11-23 20:33:20,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:20,418 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2019-11-23 20:33:20,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:33:20,420 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2019-11-23 20:33:20,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:33:20,421 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:20,421 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:20,421 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:20,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:20,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1948917626, now seen corresponding path program 1 times [2019-11-23 20:33:20,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:20,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491477119] [2019-11-23 20:33:20,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:20,496 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 20:33:20,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491477119] [2019-11-23 20:33:20,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:33:20,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:33:20,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082295291] [2019-11-23 20:33:20,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:33:20,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:20,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:33:20,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:33:20,501 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand 3 states. [2019-11-23 20:33:20,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:20,604 INFO L93 Difference]: Finished difference Result 48 states and 69 transitions. [2019-11-23 20:33:20,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:33:20,604 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:33:20,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:20,605 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:33:20,606 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 20:33:20,607 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 20:33:20,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 20:33:20,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2019-11-23 20:33:20,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:33:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2019-11-23 20:33:20,614 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 10 [2019-11-23 20:33:20,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:20,614 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2019-11-23 20:33:20,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:33:20,615 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2019-11-23 20:33:20,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 20:33:20,616 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:20,616 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] [2019-11-23 20:33:20,616 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:20,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:20,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1221461665, now seen corresponding path program 1 times [2019-11-23 20:33:20,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:20,617 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694558300] [2019-11-23 20:33:20,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:33:20,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694558300] [2019-11-23 20:33:20,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:33:20,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 20:33:20,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083649652] [2019-11-23 20:33:20,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:33:20,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:20,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:33:20,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:33:20,732 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 5 states. [2019-11-23 20:33:20,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:20,852 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2019-11-23 20:33:20,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:33:20,852 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-11-23 20:33:20,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:20,854 INFO L225 Difference]: With dead ends: 40 [2019-11-23 20:33:20,854 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:33:20,854 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:33:20,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:33:20,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2019-11-23 20:33:20,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:33:20,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2019-11-23 20:33:20,865 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 22 [2019-11-23 20:33:20,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:20,866 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2019-11-23 20:33:20,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:33:20,866 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2019-11-23 20:33:20,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 20:33:20,868 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:20,868 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] [2019-11-23 20:33:20,868 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:20,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:20,869 INFO L82 PathProgramCache]: Analyzing trace with hash 610803999, now seen corresponding path program 1 times [2019-11-23 20:33:20,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:20,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722182930] [2019-11-23 20:33:20,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:33:20,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722182930] [2019-11-23 20:33:20,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026403607] [2019-11-23 20:33:20,957 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 20:33:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:21,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:33:21,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:33:21,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:21,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:33:21,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086846890] [2019-11-23 20:33:21,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:33:21,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:21,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:33:21,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:33:21,052 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 5 states. [2019-11-23 20:33:21,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:21,166 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2019-11-23 20:33:21,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:33:21,167 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-11-23 20:33:21,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:21,168 INFO L225 Difference]: With dead ends: 78 [2019-11-23 20:33:21,168 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:33:21,169 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 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 20:33:21,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:33:21,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 43. [2019-11-23 20:33:21,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 20:33:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2019-11-23 20:33:21,177 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 22 [2019-11-23 20:33:21,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:21,177 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2019-11-23 20:33:21,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:33:21,177 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2019-11-23 20:33:21,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 20:33:21,178 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:21,179 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:21,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:21,382 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:21,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:21,383 INFO L82 PathProgramCache]: Analyzing trace with hash 271130974, now seen corresponding path program 2 times [2019-11-23 20:33:21,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:21,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338828779] [2019-11-23 20:33:21,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 20:33:21,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338828779] [2019-11-23 20:33:21,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875109356] [2019-11-23 20:33:21,472 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 20:33:21,529 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:33:21,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:21,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:33:21,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:21,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 20:33:21,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:21,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:33:21,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613496207] [2019-11-23 20:33:21,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:33:21,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:21,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:33:21,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:33:21,554 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand 6 states. [2019-11-23 20:33:21,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:21,651 INFO L93 Difference]: Finished difference Result 108 states and 150 transitions. [2019-11-23 20:33:21,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:33:21,651 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2019-11-23 20:33:21,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:21,653 INFO L225 Difference]: With dead ends: 108 [2019-11-23 20:33:21,653 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:33:21,653 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 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 20:33:21,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:33:21,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2019-11-23 20:33:21,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:33:21,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2019-11-23 20:33:21,662 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 34 [2019-11-23 20:33:21,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:21,662 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2019-11-23 20:33:21,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:33:21,663 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2019-11-23 20:33:21,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 20:33:21,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:21,664 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] [2019-11-23 20:33:21,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:21,874 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:21,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:21,875 INFO L82 PathProgramCache]: Analyzing trace with hash 984188611, now seen corresponding path program 3 times [2019-11-23 20:33:21,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:21,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629255931] [2019-11-23 20:33:21,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:33:21,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629255931] [2019-11-23 20:33:21,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790631392] [2019-11-23 20:33:21,997 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 20:33:22,047 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:33:22,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:22,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:33:22,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:22,112 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:33:22,112 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:22,119 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:22,119 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:33:22,119 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-11-23 20:33:22,271 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:33:22,305 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:22,305 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2019-11-23 20:33:22,307 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:22,325 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:22,326 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2019-11-23 20:33:22,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:33:22,329 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:22,379 INFO L567 ElimStorePlain]: treesize reduction 1, result has 96.9 percent of original size [2019-11-23 20:33:22,381 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-23 20:33:22,381 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:69, output treesize:18 [2019-11-23 20:33:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-23 20:33:22,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:22,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2019-11-23 20:33:22,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324790588] [2019-11-23 20:33:22,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:33:22,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:22,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:33:22,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:33:22,459 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand 13 states. [2019-11-23 20:33:23,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:23,321 INFO L93 Difference]: Finished difference Result 246 states and 354 transitions. [2019-11-23 20:33:23,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:33:23,322 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2019-11-23 20:33:23,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:23,325 INFO L225 Difference]: With dead ends: 246 [2019-11-23 20:33:23,325 INFO L226 Difference]: Without dead ends: 196 [2019-11-23 20:33:23,327 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:33:23,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-11-23 20:33:23,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 177. [2019-11-23 20:33:23,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-11-23 20:33:23,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 247 transitions. [2019-11-23 20:33:23,346 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 247 transitions. Word has length 46 [2019-11-23 20:33:23,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:23,346 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 247 transitions. [2019-11-23 20:33:23,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:33:23,346 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 247 transitions. [2019-11-23 20:33:23,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-23 20:33:23,349 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:23,349 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:23,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:23,565 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:23,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:23,565 INFO L82 PathProgramCache]: Analyzing trace with hash 852556072, now seen corresponding path program 1 times [2019-11-23 20:33:23,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:23,567 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212367066] [2019-11-23 20:33:23,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-23 20:33:23,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212367066] [2019-11-23 20:33:23,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659438740] [2019-11-23 20:33:23,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:33:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:23,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:33:23,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-23 20:33:23,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:23,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:33:23,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340666110] [2019-11-23 20:33:23,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:33:23,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:23,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:33:23,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:33:23,832 INFO L87 Difference]: Start difference. First operand 177 states and 247 transitions. Second operand 10 states. [2019-11-23 20:33:24,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:24,019 INFO L93 Difference]: Finished difference Result 420 states and 586 transitions. [2019-11-23 20:33:24,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:33:24,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2019-11-23 20:33:24,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:24,022 INFO L225 Difference]: With dead ends: 420 [2019-11-23 20:33:24,023 INFO L226 Difference]: Without dead ends: 258 [2019-11-23 20:33:24,025 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:33:24,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-11-23 20:33:24,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 204. [2019-11-23 20:33:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-11-23 20:33:24,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 285 transitions. [2019-11-23 20:33:24,069 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 285 transitions. Word has length 82 [2019-11-23 20:33:24,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:24,073 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 285 transitions. [2019-11-23 20:33:24,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:33:24,073 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 285 transitions. [2019-11-23 20:33:24,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-23 20:33:24,078 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:24,078 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:24,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:24,279 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:24,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:24,280 INFO L82 PathProgramCache]: Analyzing trace with hash -937413107, now seen corresponding path program 2 times [2019-11-23 20:33:24,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:24,280 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94794704] [2019-11-23 20:33:24,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2019-11-23 20:33:24,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94794704] [2019-11-23 20:33:24,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993310729] [2019-11-23 20:33:24,480 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 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 20:33:24,561 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:33:24,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:24,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:33:24,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2019-11-23 20:33:24,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:24,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:33:24,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69865543] [2019-11-23 20:33:24,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:33:24,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:24,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:33:24,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:33:24,599 INFO L87 Difference]: Start difference. First operand 204 states and 285 transitions. Second operand 11 states. [2019-11-23 20:33:24,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:24,778 INFO L93 Difference]: Finished difference Result 472 states and 660 transitions. [2019-11-23 20:33:24,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:33:24,778 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 94 [2019-11-23 20:33:24,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:24,780 INFO L225 Difference]: With dead ends: 472 [2019-11-23 20:33:24,780 INFO L226 Difference]: Without dead ends: 285 [2019-11-23 20:33:24,781 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 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 20:33:24,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2019-11-23 20:33:24,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 231. [2019-11-23 20:33:24,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2019-11-23 20:33:24,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 323 transitions. [2019-11-23 20:33:24,806 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 323 transitions. Word has length 94 [2019-11-23 20:33:24,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:24,806 INFO L462 AbstractCegarLoop]: Abstraction has 231 states and 323 transitions. [2019-11-23 20:33:24,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:33:24,808 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 323 transitions. [2019-11-23 20:33:24,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-23 20:33:24,810 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:24,810 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:25,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:25,019 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:25,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:25,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1234891020, now seen corresponding path program 3 times [2019-11-23 20:33:25,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:25,020 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73179286] [2019-11-23 20:33:25,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2019-11-23 20:33:25,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73179286] [2019-11-23 20:33:25,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925349537] [2019-11-23 20:33:25,159 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 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 20:33:25,219 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:33:25,219 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:25,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:33:25,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:25,236 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:33:25,237 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:25,241 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:25,242 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:33:25,242 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 20:33:25,308 INFO L343 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2019-11-23 20:33:25,309 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2019-11-23 20:33:25,309 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:25,316 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:25,316 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:33:25,317 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2019-11-23 20:33:25,476 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:33:25,485 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:33:25,501 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:25,501 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 52 [2019-11-23 20:33:25,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:33:25,503 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:33:25,504 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:25,538 INFO L343 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2019-11-23 20:33:25,539 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 50 [2019-11-23 20:33:25,540 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:25,573 INFO L567 ElimStorePlain]: treesize reduction 1, result has 97.2 percent of original size [2019-11-23 20:33:25,574 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-11-23 20:33:25,575 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:87, output treesize:17 [2019-11-23 20:33:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 34 proven. 88 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2019-11-23 20:33:25,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:25,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2019-11-23 20:33:25,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268957544] [2019-11-23 20:33:25,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:33:25,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:25,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:33:25,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:33:25,736 INFO L87 Difference]: Start difference. First operand 231 states and 323 transitions. Second operand 22 states. [2019-11-23 20:33:53,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:53,040 INFO L93 Difference]: Finished difference Result 820 states and 1157 transitions. [2019-11-23 20:33:53,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-11-23 20:33:53,041 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2019-11-23 20:33:53,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:53,046 INFO L225 Difference]: With dead ends: 820 [2019-11-23 20:33:53,046 INFO L226 Difference]: Without dead ends: 608 [2019-11-23 20:33:53,050 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=1619, Invalid=5518, Unknown=3, NotChecked=0, Total=7140 [2019-11-23 20:33:53,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2019-11-23 20:33:53,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 478. [2019-11-23 20:33:53,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2019-11-23 20:33:53,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 677 transitions. [2019-11-23 20:33:53,069 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 677 transitions. Word has length 106 [2019-11-23 20:33:53,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:53,069 INFO L462 AbstractCegarLoop]: Abstraction has 478 states and 677 transitions. [2019-11-23 20:33:53,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:33:53,069 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 677 transitions. [2019-11-23 20:33:53,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-23 20:33:53,072 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:53,072 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:53,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:53,273 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:53,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:53,274 INFO L82 PathProgramCache]: Analyzing trace with hash 267424402, now seen corresponding path program 4 times [2019-11-23 20:33:53,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:53,275 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745453495] [2019-11-23 20:33:53,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2019-11-23 20:33:53,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745453495] [2019-11-23 20:33:53,464 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804162729] [2019-11-23 20:33:53,464 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 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 20:33:53,534 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:33:53,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:53,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 59 conjunts are in the unsatisfiable core [2019-11-23 20:33:53,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:53,626 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:33:53,626 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:53,632 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:53,632 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:33:53,633 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-11-23 20:33:53,689 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:53,690 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2019-11-23 20:33:53,691 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:53,707 INFO L567 ElimStorePlain]: treesize reduction 30, result has 44.4 percent of original size [2019-11-23 20:33:53,707 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:33:53,708 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2019-11-23 20:33:53,785 INFO L343 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2019-11-23 20:33:53,786 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2019-11-23 20:33:53,786 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:53,796 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:53,796 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:33:53,797 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2019-11-23 20:33:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 178 proven. 489 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2019-11-23 20:33:54,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:54,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 28] total 40 [2019-11-23 20:33:54,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406392521] [2019-11-23 20:33:54,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:33:54,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:54,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:33:54,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=1206, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:33:54,295 INFO L87 Difference]: Start difference. First operand 478 states and 677 transitions. Second operand 40 states. [2019-11-23 20:33:56,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:56,181 INFO L93 Difference]: Finished difference Result 1386 states and 1961 transitions. [2019-11-23 20:33:56,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:33:56,182 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 154 [2019-11-23 20:33:56,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:56,188 INFO L225 Difference]: With dead ends: 1386 [2019-11-23 20:33:56,188 INFO L226 Difference]: Without dead ends: 935 [2019-11-23 20:33:56,190 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=385, Invalid=1421, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:33:56,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2019-11-23 20:33:56,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 631. [2019-11-23 20:33:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2019-11-23 20:33:56,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 896 transitions. [2019-11-23 20:33:56,224 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 896 transitions. Word has length 154 [2019-11-23 20:33:56,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:56,224 INFO L462 AbstractCegarLoop]: Abstraction has 631 states and 896 transitions. [2019-11-23 20:33:56,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:33:56,225 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 896 transitions. [2019-11-23 20:33:56,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-23 20:33:56,228 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:56,229 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:56,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:56,443 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:56,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:56,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1067675147, now seen corresponding path program 5 times [2019-11-23 20:33:56,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:56,446 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61614661] [2019-11-23 20:33:56,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 806 trivial. 0 not checked. [2019-11-23 20:33:56,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61614661] [2019-11-23 20:33:56,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174130750] [2019-11-23 20:33:56,772 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 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 20:34:17,600 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-11-23 20:34:17,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:17,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:34:17,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2019-11-23 20:34:17,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:17,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:34:17,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388637250] [2019-11-23 20:34:17,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:34:17,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:17,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:34:17,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:34:17,672 INFO L87 Difference]: Start difference. First operand 631 states and 896 transitions. Second operand 17 states. [2019-11-23 20:34:17,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:17,926 INFO L93 Difference]: Finished difference Result 1470 states and 2088 transitions. [2019-11-23 20:34:17,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:34:17,927 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 166 [2019-11-23 20:34:17,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:17,932 INFO L225 Difference]: With dead ends: 1470 [2019-11-23 20:34:17,933 INFO L226 Difference]: Without dead ends: 868 [2019-11-23 20:34:17,935 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:34:17,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2019-11-23 20:34:17,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 672. [2019-11-23 20:34:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 672 states. [2019-11-23 20:34:17,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 954 transitions. [2019-11-23 20:34:17,967 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 954 transitions. Word has length 166 [2019-11-23 20:34:17,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:17,967 INFO L462 AbstractCegarLoop]: Abstraction has 672 states and 954 transitions. [2019-11-23 20:34:17,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:34:17,968 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 954 transitions. [2019-11-23 20:34:17,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-23 20:34:17,971 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:17,971 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:18,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:18,185 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:18,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:18,186 INFO L82 PathProgramCache]: Analyzing trace with hash -430823560, now seen corresponding path program 6 times [2019-11-23 20:34:18,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:18,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071967238] [2019-11-23 20:34:18,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 938 trivial. 0 not checked. [2019-11-23 20:34:18,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071967238] [2019-11-23 20:34:18,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715771413] [2019-11-23 20:34:18,417 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 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 20:34:18,889 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 20:34:18,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:18,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:34:18,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:18,906 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:34:18,907 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:34:18,909 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:34:18,909 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:34:18,909 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 20:34:18,952 INFO L343 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2019-11-23 20:34:18,953 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2019-11-23 20:34:18,953 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:34:18,959 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:34:18,959 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:34:18,960 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2019-11-23 20:34:19,051 INFO L343 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2019-11-23 20:34:19,052 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 42 [2019-11-23 20:34:19,053 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:34:19,067 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:34:19,068 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:34:19,068 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:39 [2019-11-23 20:34:23,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:34:23,257 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:34:23,258 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:34:23,259 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:34:23,286 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:34:23,287 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 72 [2019-11-23 20:34:23,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:34:23,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:34:23,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:34:23,290 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:34:23,334 INFO L343 Elim1Store]: treesize reduction 52, result has 49.5 percent of original size [2019-11-23 20:34:23,334 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 70 [2019-11-23 20:34:23,336 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:34:23,378 INFO L567 ElimStorePlain]: treesize reduction 1, result has 97.8 percent of original size [2019-11-23 20:34:23,381 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-11-23 20:34:23,381 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:111, output treesize:23 [2019-11-23 20:34:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 98 proven. 246 refuted. 0 times theorem prover too weak. 790 trivial. 0 not checked. [2019-11-23 20:34:23,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:23,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2019-11-23 20:34:23,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901603018] [2019-11-23 20:34:23,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:34:23,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:23,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:34:23,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=658, Unknown=2, NotChecked=0, Total=930 [2019-11-23 20:34:23,683 INFO L87 Difference]: Start difference. First operand 672 states and 954 transitions. Second operand 31 states. [2019-11-23 20:34:40,216 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2019-11-23 20:34:59,729 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 36 DAG size of output: 35