./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d7026bf672987d88e3a6ea48c2c5a690fd9a5f2 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 17:29:53,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:29:53,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:29:53,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:29:53,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:29:53,550 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:29:53,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:29:53,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:29:53,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:29:53,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:29:53,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:29:53,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:29:53,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:29:53,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:29:53,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:29:53,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:29:53,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:29:53,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:29:53,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:29:53,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:29:53,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:29:53,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:29:53,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:29:53,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:29:53,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:29:53,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:29:53,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:29:53,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:29:53,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:29:53,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:29:53,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:29:53,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:29:53,588 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:29:53,589 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:29:53,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:29:53,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:29:53,593 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:29:53,593 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:29:53,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:29:53,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:29:53,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:29:53,596 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:29:53,615 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:29:53,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:29:53,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:29:53,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:29:53,617 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:29:53,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:29:53,618 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:29:53,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:29:53,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:29:53,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:29:53,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:29:53,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:29:53,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:29:53,619 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:29:53,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:29:53,620 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:29:53,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:29:53,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:29:53,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:29:53,621 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:29:53,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:29:53,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:29:53,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:29:53,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:29:53,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:29:53,622 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:29:53,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:29:53,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:29:53,623 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:29:53,623 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d7026bf672987d88e3a6ea48c2c5a690fd9a5f2 [2019-11-28 17:29:53,978 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:29:53,999 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:29:54,003 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:29:54,007 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:29:54,008 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:29:54,009 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2019-11-28 17:29:54,076 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d541ac91e/c59a8cbb74a84969a53217702e95f49d/FLAG70a64adbc [2019-11-28 17:29:54,540 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:29:54,540 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2019-11-28 17:29:54,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d541ac91e/c59a8cbb74a84969a53217702e95f49d/FLAG70a64adbc [2019-11-28 17:29:54,898 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d541ac91e/c59a8cbb74a84969a53217702e95f49d [2019-11-28 17:29:54,902 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:29:54,904 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:29:54,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:29:54,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:29:54,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:29:54,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:29:54" (1/1) ... [2019-11-28 17:29:54,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a0c7b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:54, skipping insertion in model container [2019-11-28 17:29:54,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:29:54" (1/1) ... [2019-11-28 17:29:54,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:29:54,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:29:55,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:29:55,103 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:29:55,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:29:55,128 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:29:55,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:55 WrapperNode [2019-11-28 17:29:55,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:29:55,130 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:29:55,130 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:29:55,130 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:29:55,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:55" (1/1) ... [2019-11-28 17:29:55,142 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:55" (1/1) ... [2019-11-28 17:29:55,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:29:55,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:29:55,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:29:55,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:29:55,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:55" (1/1) ... [2019-11-28 17:29:55,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:55" (1/1) ... [2019-11-28 17:29:55,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:55" (1/1) ... [2019-11-28 17:29:55,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:55" (1/1) ... [2019-11-28 17:29:55,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:55" (1/1) ... [2019-11-28 17:29:55,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:55" (1/1) ... [2019-11-28 17:29:55,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:55" (1/1) ... [2019-11-28 17:29:55,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:29:55,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:29:55,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:29:55,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:29:55,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:55" (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 [2019-11-28 17:29:55,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:29:55,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:29:55,308 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-28 17:29:55,309 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-28 17:29:55,475 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:29:55,475 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 17:29:55,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:29:55 BoogieIcfgContainer [2019-11-28 17:29:55,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:29:55,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:29:55,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:29:55,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:29:55,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:29:54" (1/3) ... [2019-11-28 17:29:55,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab2838f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:29:55, skipping insertion in model container [2019-11-28 17:29:55,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:55" (2/3) ... [2019-11-28 17:29:55,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab2838f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:29:55, skipping insertion in model container [2019-11-28 17:29:55,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:29:55" (3/3) ... [2019-11-28 17:29:55,484 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2019-11-28 17:29:55,492 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:29:55,497 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:29:55,509 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 17:29:55,535 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:29:55,535 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:29:55,535 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:29:55,535 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:29:55,535 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:29:55,535 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:29:55,536 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:29:55,536 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:29:55,554 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-28 17:29:55,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 17:29:55,560 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:55,561 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:55,562 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:55,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:55,568 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-28 17:29:55,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:55,578 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068511499] [2019-11-28 17:29:55,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:29:55,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068511499] [2019-11-28 17:29:55,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:29:55,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 17:29:55,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586798479] [2019-11-28 17:29:55,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:29:55,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:55,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:29:55,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:29:55,917 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-11-28 17:29:56,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:56,033 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-28 17:29:56,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:29:56,036 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-28 17:29:56,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:56,046 INFO L225 Difference]: With dead ends: 24 [2019-11-28 17:29:56,047 INFO L226 Difference]: Without dead ends: 14 [2019-11-28 17:29:56,050 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 17:29:56,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-28 17:29:56,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-28 17:29:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-28 17:29:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-28 17:29:56,091 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-28 17:29:56,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:56,091 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-28 17:29:56,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:29:56,092 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-28 17:29:56,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 17:29:56,093 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:56,094 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:56,094 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:56,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:56,095 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-28 17:29:56,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:56,095 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548948298] [2019-11-28 17:29:56,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:56,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 17:29:56,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548948298] [2019-11-28 17:29:56,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11055109] [2019-11-28 17:29:56,227 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 [2019-11-28 17:29:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:56,276 INFO L264 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 17:29:56,282 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 17:29:56,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:56,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-11-28 17:29:56,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452452663] [2019-11-28 17:29:56,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 17:29:56,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:56,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 17:29:56,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:29:56,374 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2019-11-28 17:29:56,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:56,456 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-28 17:29:56,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 17:29:56,458 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-28 17:29:56,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:56,459 INFO L225 Difference]: With dead ends: 21 [2019-11-28 17:29:56,459 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 17:29:56,461 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:29:56,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 17:29:56,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-28 17:29:56,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 17:29:56,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-28 17:29:56,467 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-28 17:29:56,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:56,468 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-28 17:29:56,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 17:29:56,469 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-28 17:29:56,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 17:29:56,470 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:56,470 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:56,674 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:56,674 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:56,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:56,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-28 17:29:56,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:56,676 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510610501] [2019-11-28 17:29:56,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-28 17:29:56,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510610501] [2019-11-28 17:29:56,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292950299] [2019-11-28 17:29:56,851 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 [2019-11-28 17:29:56,893 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:29:56,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:29:56,895 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 17:29:56,898 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-28 17:29:56,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:56,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-28 17:29:56,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221624846] [2019-11-28 17:29:56,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 17:29:56,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:56,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 17:29:56,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:29:56,952 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2019-11-28 17:29:57,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:57,039 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-28 17:29:57,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 17:29:57,040 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-11-28 17:29:57,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:57,041 INFO L225 Difference]: With dead ends: 24 [2019-11-28 17:29:57,041 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 17:29:57,042 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2019-11-28 17:29:57,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 17:29:57,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-28 17:29:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 17:29:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-28 17:29:57,048 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-28 17:29:57,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:57,049 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-28 17:29:57,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 17:29:57,049 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-28 17:29:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-28 17:29:57,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:57,051 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:57,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:57,255 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:57,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:57,256 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-28 17:29:57,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:57,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566331791] [2019-11-28 17:29:57,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-28 17:29:57,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566331791] [2019-11-28 17:29:57,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68117556] [2019-11-28 17:29:57,455 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 [2019-11-28 17:29:57,492 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-28 17:29:57,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:29:57,494 INFO L264 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 17:29:57,496 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-28 17:29:57,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:57,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2019-11-28 17:29:57,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361885810] [2019-11-28 17:29:57,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 17:29:57,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:57,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 17:29:57,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:29:57,539 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2019-11-28 17:29:57,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:57,639 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-28 17:29:57,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 17:29:57,640 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2019-11-28 17:29:57,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:57,641 INFO L225 Difference]: With dead ends: 27 [2019-11-28 17:29:57,641 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 17:29:57,642 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-11-28 17:29:57,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 17:29:57,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 17:29:57,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 17:29:57,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-28 17:29:57,648 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-28 17:29:57,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:57,648 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-28 17:29:57,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 17:29:57,649 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-28 17:29:57,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-28 17:29:57,650 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:57,650 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:57,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:57,852 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:57,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:57,853 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-28 17:29:57,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:57,854 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612006159] [2019-11-28 17:29:57,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-28 17:29:58,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612006159] [2019-11-28 17:29:58,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104830315] [2019-11-28 17:29:58,065 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:58,105 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 17:29:58,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:29:58,107 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 17:29:58,116 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-28 17:29:58,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:58,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2019-11-28 17:29:58,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632580750] [2019-11-28 17:29:58,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 17:29:58,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:58,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 17:29:58,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-28 17:29:58,161 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 11 states. [2019-11-28 17:29:58,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:58,253 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-28 17:29:58,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 17:29:58,253 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2019-11-28 17:29:58,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:58,255 INFO L225 Difference]: With dead ends: 30 [2019-11-28 17:29:58,255 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 17:29:58,256 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-11-28 17:29:58,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 17:29:58,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-28 17:29:58,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 17:29:58,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-28 17:29:58,263 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-28 17:29:58,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:58,263 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-28 17:29:58,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 17:29:58,264 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-28 17:29:58,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-28 17:29:58,265 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:58,266 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:58,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:58,470 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:58,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:58,473 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-28 17:29:58,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:58,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829245972] [2019-11-28 17:29:58,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-28 17:29:58,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829245972] [2019-11-28 17:29:58,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205516365] [2019-11-28 17:29:58,730 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-28 17:29:58,781 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-28 17:29:58,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:29:58,782 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 17:29:58,785 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-28 17:29:58,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:58,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2019-11-28 17:29:58,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122207117] [2019-11-28 17:29:58,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-28 17:29:58,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:58,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 17:29:58,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-28 17:29:58,840 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 12 states. [2019-11-28 17:29:58,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:58,938 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-28 17:29:58,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 17:29:58,939 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2019-11-28 17:29:58,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:58,940 INFO L225 Difference]: With dead ends: 33 [2019-11-28 17:29:58,940 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 17:29:58,941 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-11-28 17:29:58,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 17:29:58,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-28 17:29:58,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-28 17:29:58,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-28 17:29:58,948 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-28 17:29:58,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:58,948 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-28 17:29:58,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-28 17:29:58,949 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-28 17:29:58,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-28 17:29:58,950 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:58,950 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:59,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:59,155 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:59,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:59,156 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-28 17:29:59,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:59,156 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93302648] [2019-11-28 17:29:59,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,357 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-28 17:29:59,357 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93302648] [2019-11-28 17:29:59,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882348068] [2019-11-28 17:29:59,358 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:59,410 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-28 17:29:59,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:29:59,411 INFO L264 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 17:29:59,415 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-28 17:29:59,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:59,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2019-11-28 17:29:59,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291780371] [2019-11-28 17:29:59,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-28 17:29:59,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:59,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-28 17:29:59,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-28 17:29:59,471 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 13 states. [2019-11-28 17:29:59,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:59,586 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-28 17:29:59,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 17:29:59,587 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2019-11-28 17:29:59,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:59,588 INFO L225 Difference]: With dead ends: 36 [2019-11-28 17:29:59,588 INFO L226 Difference]: Without dead ends: 32 [2019-11-28 17:29:59,589 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2019-11-28 17:29:59,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-28 17:29:59,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-28 17:29:59,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-28 17:29:59,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-28 17:29:59,595 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-28 17:29:59,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:59,596 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-28 17:29:59,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-28 17:29:59,596 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-28 17:29:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-28 17:29:59,598 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:59,598 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:59,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:59,803 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:59,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:59,804 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-28 17:29:59,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:59,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041787131] [2019-11-28 17:29:59,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-28 17:30:00,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041787131] [2019-11-28 17:30:00,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111091823] [2019-11-28 17:30:00,116 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,153 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 17:30:00,158 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-28 17:30:00,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:00,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2019-11-28 17:30:00,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442624718] [2019-11-28 17:30:00,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-28 17:30:00,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:00,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 17:30:00,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-11-28 17:30:00,221 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 14 states. [2019-11-28 17:30:00,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:00,372 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-28 17:30:00,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-28 17:30:00,373 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2019-11-28 17:30:00,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:00,374 INFO L225 Difference]: With dead ends: 39 [2019-11-28 17:30:00,375 INFO L226 Difference]: Without dead ends: 35 [2019-11-28 17:30:00,375 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2019-11-28 17:30:00,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-28 17:30:00,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-28 17:30:00,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-28 17:30:00,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-28 17:30:00,386 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-28 17:30:00,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:00,387 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-28 17:30:00,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-28 17:30:00,387 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-28 17:30:00,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-28 17:30:00,392 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:00,393 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:00,597 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:00,597 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:00,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:00,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-28 17:30:00,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:00,598 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257932339] [2019-11-28 17:30:00,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-28 17:30:00,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257932339] [2019-11-28 17:30:00,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955762469] [2019-11-28 17:30:00,865 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:00,923 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:30:00,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:00,926 INFO L264 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 17:30:00,937 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-28 17:30:01,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:01,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2019-11-28 17:30:01,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855232136] [2019-11-28 17:30:01,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-28 17:30:01,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:01,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-28 17:30:01,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-11-28 17:30:01,041 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 15 states. [2019-11-28 17:30:01,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:01,189 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-28 17:30:01,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 17:30:01,190 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2019-11-28 17:30:01,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:01,191 INFO L225 Difference]: With dead ends: 42 [2019-11-28 17:30:01,191 INFO L226 Difference]: Without dead ends: 38 [2019-11-28 17:30:01,194 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2019-11-28 17:30:01,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-28 17:30:01,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-28 17:30:01,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-28 17:30:01,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-28 17:30:01,203 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-28 17:30:01,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:01,204 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-28 17:30:01,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-28 17:30:01,204 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-28 17:30:01,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-28 17:30:01,206 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:01,206 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:01,410 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:01,410 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:01,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:01,411 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-28 17:30:01,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:01,411 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286016156] [2019-11-28 17:30:01,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-28 17:30:01,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286016156] [2019-11-28 17:30:01,698 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167644579] [2019-11-28 17:30:01,698 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:01,746 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-28 17:30:01,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:01,748 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-28 17:30:01,758 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-28 17:30:01,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:01,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2019-11-28 17:30:01,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952392423] [2019-11-28 17:30:01,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-28 17:30:01,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:01,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-28 17:30:01,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-11-28 17:30:01,823 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 16 states. [2019-11-28 17:30:01,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:01,956 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-28 17:30:01,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 17:30:01,957 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2019-11-28 17:30:01,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:01,958 INFO L225 Difference]: With dead ends: 45 [2019-11-28 17:30:01,958 INFO L226 Difference]: Without dead ends: 41 [2019-11-28 17:30:01,959 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2019-11-28 17:30:01,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-28 17:30:01,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-28 17:30:01,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-28 17:30:01,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-28 17:30:01,965 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-28 17:30:01,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:01,966 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-28 17:30:01,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-28 17:30:01,966 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-28 17:30:01,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-28 17:30:01,967 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:01,967 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:02,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:02,180 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:02,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:02,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-28 17:30:02,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:02,181 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185742618] [2019-11-28 17:30:02,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-28 17:30:02,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185742618] [2019-11-28 17:30:02,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828360462] [2019-11-28 17:30:02,486 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:02,541 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 17:30:02,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:02,543 INFO L264 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 17:30:02,558 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-28 17:30:02,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:02,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2019-11-28 17:30:02,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059137709] [2019-11-28 17:30:02,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-28 17:30:02,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:02,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-28 17:30:02,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-11-28 17:30:02,640 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 17 states. [2019-11-28 17:30:02,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:02,851 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-11-28 17:30:02,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-28 17:30:02,852 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2019-11-28 17:30:02,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:02,853 INFO L225 Difference]: With dead ends: 48 [2019-11-28 17:30:02,854 INFO L226 Difference]: Without dead ends: 44 [2019-11-28 17:30:02,855 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2019-11-28 17:30:02,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-28 17:30:02,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-28 17:30:02,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-28 17:30:02,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-28 17:30:02,861 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-11-28 17:30:02,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:02,862 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-28 17:30:02,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-28 17:30:02,862 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-28 17:30:02,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-28 17:30:02,863 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:02,864 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:03,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:03,068 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:03,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:03,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-11-28 17:30:03,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:03,069 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303329426] [2019-11-28 17:30:03,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,393 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-28 17:30:03,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303329426] [2019-11-28 17:30:03,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244653318] [2019-11-28 17:30:03,394 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:03,457 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-28 17:30:03,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:03,460 INFO L264 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-28 17:30:03,462 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-28 17:30:03,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:03,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2019-11-28 17:30:03,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067738190] [2019-11-28 17:30:03,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-28 17:30:03,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:03,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-28 17:30:03,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2019-11-28 17:30:03,532 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 18 states. [2019-11-28 17:30:03,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:03,704 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-11-28 17:30:03,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-28 17:30:03,705 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2019-11-28 17:30:03,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:03,706 INFO L225 Difference]: With dead ends: 51 [2019-11-28 17:30:03,706 INFO L226 Difference]: Without dead ends: 47 [2019-11-28 17:30:03,707 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2019-11-28 17:30:03,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-28 17:30:03,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-28 17:30:03,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-28 17:30:03,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-11-28 17:30:03,714 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-11-28 17:30:03,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:03,714 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-11-28 17:30:03,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-28 17:30:03,715 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-11-28 17:30:03,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-28 17:30:03,716 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:03,716 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:03,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:03,925 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:03,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:03,925 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-11-28 17:30:03,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:03,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626397719] [2019-11-28 17:30:03,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-28 17:30:04,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626397719] [2019-11-28 17:30:04,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692304577] [2019-11-28 17:30:04,293 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:04,343 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-28 17:30:04,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:04,345 INFO L264 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-28 17:30:04,347 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-28 17:30:04,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:04,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2019-11-28 17:30:04,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654157592] [2019-11-28 17:30:04,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-28 17:30:04,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:04,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-28 17:30:04,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2019-11-28 17:30:04,402 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 19 states. [2019-11-28 17:30:04,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:04,580 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-11-28 17:30:04,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-28 17:30:04,581 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2019-11-28 17:30:04,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:04,582 INFO L225 Difference]: With dead ends: 54 [2019-11-28 17:30:04,583 INFO L226 Difference]: Without dead ends: 50 [2019-11-28 17:30:04,584 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2019-11-28 17:30:04,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-28 17:30:04,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-28 17:30:04,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-28 17:30:04,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-28 17:30:04,590 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-11-28 17:30:04,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:04,591 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-28 17:30:04,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-28 17:30:04,591 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-28 17:30:04,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-28 17:30:04,592 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:04,593 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:04,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:04,797 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:04,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:04,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-11-28 17:30:04,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:04,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898386580] [2019-11-28 17:30:04,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-28 17:30:05,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898386580] [2019-11-28 17:30:05,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948255975] [2019-11-28 17:30:05,418 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:05,462 INFO L264 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-28 17:30:05,465 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-28 17:30:05,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:05,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2019-11-28 17:30:05,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061891158] [2019-11-28 17:30:05,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-28 17:30:05,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:05,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-28 17:30:05,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2019-11-28 17:30:05,523 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 20 states. [2019-11-28 17:30:05,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:05,761 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-11-28 17:30:05,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-28 17:30:05,763 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 87 [2019-11-28 17:30:05,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:05,764 INFO L225 Difference]: With dead ends: 57 [2019-11-28 17:30:05,765 INFO L226 Difference]: Without dead ends: 53 [2019-11-28 17:30:05,766 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2019-11-28 17:30:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-28 17:30:05,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-28 17:30:05,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-28 17:30:05,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-11-28 17:30:05,780 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-11-28 17:30:05,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:05,781 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-11-28 17:30:05,781 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-28 17:30:05,782 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-11-28 17:30:05,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-28 17:30:05,783 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:05,784 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:05,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:05,987 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:05,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:05,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-11-28 17:30:05,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:05,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422171847] [2019-11-28 17:30:05,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-28 17:30:06,422 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422171847] [2019-11-28 17:30:06,422 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617389598] [2019-11-28 17:30:06,423 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:06,483 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:30:06,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:06,485 INFO L264 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-28 17:30:06,487 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-28 17:30:06,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:06,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2019-11-28 17:30:06,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444944745] [2019-11-28 17:30:06,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-28 17:30:06,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:06,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-28 17:30:06,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2019-11-28 17:30:06,556 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 21 states. [2019-11-28 17:30:06,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:06,746 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-11-28 17:30:06,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-28 17:30:06,747 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2019-11-28 17:30:06,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:06,748 INFO L225 Difference]: With dead ends: 60 [2019-11-28 17:30:06,748 INFO L226 Difference]: Without dead ends: 56 [2019-11-28 17:30:06,750 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2019-11-28 17:30:06,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-28 17:30:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-28 17:30:06,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-28 17:30:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-11-28 17:30:06,756 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-11-28 17:30:06,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:06,756 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-11-28 17:30:06,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-28 17:30:06,757 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-11-28 17:30:06,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-28 17:30:06,758 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:06,758 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:06,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:06,964 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:06,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:06,964 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-11-28 17:30:06,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:06,965 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546809169] [2019-11-28 17:30:06,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-11-28 17:30:07,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546809169] [2019-11-28 17:30:07,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078438349] [2019-11-28 17:30:07,475 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:07,543 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-28 17:30:07,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:07,544 INFO L264 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-28 17:30:07,547 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-11-28 17:30:07,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:07,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2019-11-28 17:30:07,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136072789] [2019-11-28 17:30:07,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-28 17:30:07,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:07,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-28 17:30:07,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2019-11-28 17:30:07,606 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 22 states. [2019-11-28 17:30:07,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:07,839 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2019-11-28 17:30:07,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-28 17:30:07,840 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2019-11-28 17:30:07,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:07,841 INFO L225 Difference]: With dead ends: 63 [2019-11-28 17:30:07,841 INFO L226 Difference]: Without dead ends: 59 [2019-11-28 17:30:07,842 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2019-11-28 17:30:07,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-28 17:30:07,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-28 17:30:07,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-28 17:30:07,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-11-28 17:30:07,847 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2019-11-28 17:30:07,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:07,848 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-11-28 17:30:07,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-28 17:30:07,848 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-11-28 17:30:07,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-28 17:30:07,849 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:07,849 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:08,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:08,053 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:08,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:08,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2019-11-28 17:30:08,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:08,055 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105559939] [2019-11-28 17:30:08,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:08,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-28 17:30:08,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105559939] [2019-11-28 17:30:08,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317651447] [2019-11-28 17:30:08,629 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:08,692 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 17:30:08,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:08,694 INFO L264 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-28 17:30:08,696 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-28 17:30:08,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:08,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2019-11-28 17:30:08,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814114413] [2019-11-28 17:30:08,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-28 17:30:08,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:08,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-28 17:30:08,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2019-11-28 17:30:08,767 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 23 states. [2019-11-28 17:30:08,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:08,999 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2019-11-28 17:30:09,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-28 17:30:09,000 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 105 [2019-11-28 17:30:09,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:09,001 INFO L225 Difference]: With dead ends: 66 [2019-11-28 17:30:09,001 INFO L226 Difference]: Without dead ends: 62 [2019-11-28 17:30:09,002 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2019-11-28 17:30:09,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-28 17:30:09,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-28 17:30:09,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-28 17:30:09,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-11-28 17:30:09,008 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2019-11-28 17:30:09,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:09,009 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-11-28 17:30:09,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-28 17:30:09,009 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-11-28 17:30:09,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-28 17:30:09,010 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:09,010 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:09,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:09,215 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:09,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:09,216 INFO L82 PathProgramCache]: Analyzing trace with hash 2109441939, now seen corresponding path program 17 times [2019-11-28 17:30:09,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:09,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730865882] [2019-11-28 17:30:09,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-28 17:30:09,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730865882] [2019-11-28 17:30:09,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577422439] [2019-11-28 17:30:09,835 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:09,901 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-28 17:30:09,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:09,902 INFO L264 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-28 17:30:09,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-28 17:30:09,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:09,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2019-11-28 17:30:09,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126993425] [2019-11-28 17:30:09,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-28 17:30:09,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:09,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-28 17:30:09,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2019-11-28 17:30:09,976 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 24 states. [2019-11-28 17:30:10,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:10,232 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2019-11-28 17:30:10,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-28 17:30:10,233 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 111 [2019-11-28 17:30:10,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:10,234 INFO L225 Difference]: With dead ends: 69 [2019-11-28 17:30:10,235 INFO L226 Difference]: Without dead ends: 65 [2019-11-28 17:30:10,236 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=614, Invalid=1108, Unknown=0, NotChecked=0, Total=1722 [2019-11-28 17:30:10,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-28 17:30:10,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-11-28 17:30:10,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-28 17:30:10,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-11-28 17:30:10,240 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2019-11-28 17:30:10,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:10,241 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-11-28 17:30:10,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-28 17:30:10,241 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-11-28 17:30:10,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-28 17:30:10,242 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:10,242 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:10,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:10,446 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:10,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:10,447 INFO L82 PathProgramCache]: Analyzing trace with hash 450642089, now seen corresponding path program 18 times [2019-11-28 17:30:10,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:10,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619399865] [2019-11-28 17:30:10,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-28 17:30:11,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619399865] [2019-11-28 17:30:11,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022706266] [2019-11-28 17:30:11,027 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:11,089 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-28 17:30:11,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:11,091 INFO L264 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-28 17:30:11,093 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:11,150 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-28 17:30:11,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:11,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2019-11-28 17:30:11,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25741493] [2019-11-28 17:30:11,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-28 17:30:11,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:11,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-28 17:30:11,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2019-11-28 17:30:11,152 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 25 states. [2019-11-28 17:30:11,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:11,432 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2019-11-28 17:30:11,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-28 17:30:11,432 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 117 [2019-11-28 17:30:11,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:11,433 INFO L225 Difference]: With dead ends: 72 [2019-11-28 17:30:11,433 INFO L226 Difference]: Without dead ends: 68 [2019-11-28 17:30:11,435 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=676, Invalid=1216, Unknown=0, NotChecked=0, Total=1892 [2019-11-28 17:30:11,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-28 17:30:11,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-11-28 17:30:11,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-28 17:30:11,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2019-11-28 17:30:11,439 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2019-11-28 17:30:11,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:11,439 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2019-11-28 17:30:11,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-28 17:30:11,440 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2019-11-28 17:30:11,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-28 17:30:11,441 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:11,441 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:11,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:11,644 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:11,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:11,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1141244269, now seen corresponding path program 19 times [2019-11-28 17:30:11,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:11,645 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332524355] [2019-11-28 17:30:11,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-28 17:30:12,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332524355] [2019-11-28 17:30:12,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205705583] [2019-11-28 17:30:12,382 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,455 INFO L264 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-28 17:30:12,457 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-28 17:30:12,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:12,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2019-11-28 17:30:12,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362264346] [2019-11-28 17:30:12,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-28 17:30:12,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:12,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-28 17:30:12,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2019-11-28 17:30:12,533 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 26 states. [2019-11-28 17:30:12,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:12,793 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2019-11-28 17:30:12,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-28 17:30:12,794 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 123 [2019-11-28 17:30:12,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:12,795 INFO L225 Difference]: With dead ends: 75 [2019-11-28 17:30:12,795 INFO L226 Difference]: Without dead ends: 71 [2019-11-28 17:30:12,796 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2019-11-28 17:30:12,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-28 17:30:12,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-11-28 17:30:12,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-28 17:30:12,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2019-11-28 17:30:12,804 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2019-11-28 17:30:12,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:12,804 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2019-11-28 17:30:12,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-28 17:30:12,805 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2019-11-28 17:30:12,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-28 17:30:12,807 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:12,807 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:13,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:13,008 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:13,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:13,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1280276695, now seen corresponding path program 20 times [2019-11-28 17:30:13,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:13,009 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074133564] [2019-11-28 17:30:13,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-11-28 17:30:15,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074133564] [2019-11-28 17:30:15,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064446493] [2019-11-28 17:30:15,137 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:15,190 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:30:15,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:15,192 INFO L264 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 87 conjunts are in the unsatisfiable core [2019-11-28 17:30:15,195 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-11-28 17:30:15,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:15,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2019-11-28 17:30:15,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715482538] [2019-11-28 17:30:15,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-28 17:30:15,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:15,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-28 17:30:15,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2019-11-28 17:30:15,453 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 45 states. [2019-11-28 17:30:16,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:16,427 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2019-11-28 17:30:16,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-28 17:30:16,428 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 129 [2019-11-28 17:30:16,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:16,430 INFO L225 Difference]: With dead ends: 78 [2019-11-28 17:30:16,430 INFO L226 Difference]: Without dead ends: 74 [2019-11-28 17:30:16,431 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2019-11-28 17:30:16,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-28 17:30:16,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-11-28 17:30:16,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-28 17:30:16,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2019-11-28 17:30:16,436 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 129 [2019-11-28 17:30:16,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:16,437 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2019-11-28 17:30:16,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-28 17:30:16,437 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2019-11-28 17:30:16,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-28 17:30:16,438 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:16,438 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:16,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:16,643 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:16,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:16,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1463802477, now seen corresponding path program 21 times [2019-11-28 17:30:16,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:16,645 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18296560] [2019-11-28 17:30:16,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 630 proven. 42 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-11-28 17:30:17,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18296560] [2019-11-28 17:30:17,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328243365] [2019-11-28 17:30:17,675 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:17,756 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-28 17:30:17,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:17,758 INFO L264 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-28 17:30:17,761 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-11-28 17:30:17,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 17:30:17,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [26] total 28 [2019-11-28 17:30:17,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895589327] [2019-11-28 17:30:17,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-28 17:30:17,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:17,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-28 17:30:17,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=470, Unknown=0, NotChecked=0, Total=756 [2019-11-28 17:30:17,876 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 26 states. [2019-11-28 17:30:18,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:18,376 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2019-11-28 17:30:18,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-28 17:30:18,377 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 135 [2019-11-28 17:30:18,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:18,378 INFO L225 Difference]: With dead ends: 74 [2019-11-28 17:30:18,378 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 17:30:18,380 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=836, Invalid=1614, Unknown=0, NotChecked=0, Total=2450 [2019-11-28 17:30:18,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 17:30:18,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 17:30:18,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 17:30:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 17:30:18,381 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2019-11-28 17:30:18,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:18,381 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 17:30:18,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-28 17:30:18,381 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 17:30:18,382 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 17:30:18,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:18,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 17:30:18,608 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 17:30:18,608 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 17:30:18,608 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 17:30:18,608 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2019-11-28 17:30:18,608 INFO L246 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2019-11-28 17:30:18,608 INFO L246 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2019-11-28 17:30:18,608 INFO L242 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= 20 ULTIMATE.start_main_~input~0) (<= ULTIMATE.start_main_~input~0 20)) [2019-11-28 17:30:18,609 INFO L246 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2019-11-28 17:30:18,609 INFO L246 CegarLoopResult]: For program point L9(lines 9 15) no Hoare annotation was computed. [2019-11-28 17:30:18,609 INFO L246 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2019-11-28 17:30:18,609 INFO L246 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2019-11-28 17:30:18,609 INFO L249 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2019-11-28 17:30:18,609 INFO L242 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2019-11-28 17:30:18,609 INFO L246 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-28 17:30:18,609 INFO L246 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2019-11-28 17:30:18,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:30:18 BoogieIcfgContainer [2019-11-28 17:30:18,615 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:30:18,616 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:30:18,616 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:30:18,616 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:30:18,617 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:29:55" (3/4) ... [2019-11-28 17:30:18,620 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 17:30:18,627 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2019-11-28 17:30:18,631 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-28 17:30:18,632 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 17:30:18,670 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:30:18,670 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:30:18,672 INFO L168 Benchmark]: Toolchain (without parser) took 23768.70 ms. Allocated memory was 1.0 GB in the beginning and 1.6 GB in the end (delta: 544.7 MB). Free memory was 957.7 MB in the beginning and 1.2 GB in the end (delta: -199.3 MB). Peak memory consumption was 345.4 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:18,673 INFO L168 Benchmark]: CDTParser took 0.83 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:30:18,673 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.44 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:18,674 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.78 ms. Allocated memory is still 1.0 GB. Free memory is still 946.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:30:18,674 INFO L168 Benchmark]: Boogie Preprocessor took 80.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -177.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:18,675 INFO L168 Benchmark]: RCFGBuilder took 235.21 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:18,675 INFO L168 Benchmark]: TraceAbstraction took 23137.92 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 416.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -66.3 MB). Peak memory consumption was 350.0 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:18,675 INFO L168 Benchmark]: Witness Printer took 54.63 ms. Allocated memory is still 1.6 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:18,678 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.83 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 224.44 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.78 ms. Allocated memory is still 1.0 GB. Free memory is still 946.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 80.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -177.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 235.21 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 23137.92 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 416.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -66.3 MB). Peak memory consumption was 350.0 MB. Max. memory is 11.5 GB. * Witness Printer took 54.63 ms. Allocated memory is still 1.6 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: SAFE, OverallTime: 23.0s, OverallIterations: 22, TraceHistogramMax: 22, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 281 SDtfs, 766 SDslu, 2777 SDs, 0 SdLazy, 2222 SolverSat, 168 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2611 GetRequests, 2020 SyntacticMatches, 2 SemanticMatches, 589 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2891 ImplicationChecksByTransitivity, 8.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 11.6s InterpolantComputationTime, 3159 NumberOfCodeBlocks, 3159 NumberOfCodeBlocksAsserted, 167 NumberOfCheckSat, 3116 ConstructedInterpolants, 0 QuantifiedInterpolants, 786688 SizeOfPredicates, 252 NumberOfNonLiveVariables, 3717 ConjunctsInSsa, 589 ConjunctsInUnsatCore, 43 InterpolantComputations, 2 PerfectInterpolantSequences, 11466/20328 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...