./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test24-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 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/ldv-regression/test24-2.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 45294379b83c6b60e0b0199955cdf7244f057430 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-19 21:14:06,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 21:14:06,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 21:14:06,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 21:14:06,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 21:14:06,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 21:14:06,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 21:14:06,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 21:14:06,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 21:14:06,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 21:14:06,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 21:14:06,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 21:14:06,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 21:14:06,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 21:14:06,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 21:14:06,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 21:14:06,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 21:14:06,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 21:14:06,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 21:14:06,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 21:14:06,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 21:14:06,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 21:14:06,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 21:14:06,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 21:14:06,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 21:14:06,593 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 21:14:06,593 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 21:14:06,594 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 21:14:06,594 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 21:14:06,595 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 21:14:06,595 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 21:14:06,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 21:14:06,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 21:14:06,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 21:14:06,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 21:14:06,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 21:14:06,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 21:14:06,600 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 21:14:06,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 21:14:06,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 21:14:06,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 21:14:06,603 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 21:14:06,622 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 21:14:06,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 21:14:06,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 21:14:06,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 21:14:06,625 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 21:14:06,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 21:14:06,625 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 21:14:06,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 21:14:06,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 21:14:06,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 21:14:06,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 21:14:06,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 21:14:06,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 21:14:06,627 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 21:14:06,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 21:14:06,628 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 21:14:06,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 21:14:06,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 21:14:06,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 21:14:06,629 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 21:14:06,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 21:14:06,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 21:14:06,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 21:14:06,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 21:14:06,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 21:14:06,631 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 21:14:06,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 21:14:06,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 21:14:06,632 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 -> 45294379b83c6b60e0b0199955cdf7244f057430 [2019-11-19 21:14:06,980 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 21:14:06,994 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 21:14:06,997 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 21:14:06,999 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 21:14:06,999 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 21:14:07,001 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test24-2.c [2019-11-19 21:14:07,059 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9562e2d61/90391c28f5304d58a733015f6f893c90/FLAGf5b1a3a77 [2019-11-19 21:14:07,457 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 21:14:07,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test24-2.c [2019-11-19 21:14:07,464 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9562e2d61/90391c28f5304d58a733015f6f893c90/FLAGf5b1a3a77 [2019-11-19 21:14:07,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9562e2d61/90391c28f5304d58a733015f6f893c90 [2019-11-19 21:14:07,841 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 21:14:07,843 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 21:14:07,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 21:14:07,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 21:14:07,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 21:14:07,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:14:07" (1/1) ... [2019-11-19 21:14:07,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af5fd53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:14:07, skipping insertion in model container [2019-11-19 21:14:07,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:14:07" (1/1) ... [2019-11-19 21:14:07,861 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 21:14:07,887 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 21:14:08,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 21:14:08,137 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 21:14:08,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 21:14:08,249 INFO L192 MainTranslator]: Completed translation [2019-11-19 21:14:08,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:14:08 WrapperNode [2019-11-19 21:14:08,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 21:14:08,250 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 21:14:08,250 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 21:14:08,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 21:14:08,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:14:08" (1/1) ... [2019-11-19 21:14:08,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:14:08" (1/1) ... [2019-11-19 21:14:08,290 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 21:14:08,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 21:14:08,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 21:14:08,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 21:14:08,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:14:08" (1/1) ... [2019-11-19 21:14:08,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:14:08" (1/1) ... [2019-11-19 21:14:08,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:14:08" (1/1) ... [2019-11-19 21:14:08,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:14:08" (1/1) ... [2019-11-19 21:14:08,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:14:08" (1/1) ... [2019-11-19 21:14:08,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:14:08" (1/1) ... [2019-11-19 21:14:08,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:14:08" (1/1) ... [2019-11-19 21:14:08,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 21:14:08,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 21:14:08,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 21:14:08,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 21:14:08,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:14:08" (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 [2019-11-19 21:14:08,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-19 21:14:08,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 21:14:08,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 21:14:08,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-19 21:14:08,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-19 21:14:08,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-19 21:14:08,626 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 21:14:08,627 INFO L285 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-19 21:14:08,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:14:08 BoogieIcfgContainer [2019-11-19 21:14:08,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 21:14:08,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 21:14:08,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 21:14:08,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 21:14:08,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:14:07" (1/3) ... [2019-11-19 21:14:08,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccbd31b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:14:08, skipping insertion in model container [2019-11-19 21:14:08,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:14:08" (2/3) ... [2019-11-19 21:14:08,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccbd31b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:14:08, skipping insertion in model container [2019-11-19 21:14:08,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:14:08" (3/3) ... [2019-11-19 21:14:08,658 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2019-11-19 21:14:08,690 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 21:14:08,703 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 21:14:08,717 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 21:14:08,744 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 21:14:08,744 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 21:14:08,744 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 21:14:08,745 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 21:14:08,745 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 21:14:08,745 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 21:14:08,745 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 21:14:08,746 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 21:14:08,775 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-19 21:14:08,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-19 21:14:08,789 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:08,790 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:08,794 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:08,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:08,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1829445793, now seen corresponding path program 1 times [2019-11-19 21:14:08,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:08,824 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360781415] [2019-11-19 21:14:08,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:09,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360781415] [2019-11-19 21:14:09,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 21:14:09,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-19 21:14:09,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024053511] [2019-11-19 21:14:09,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-19 21:14:09,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:14:09,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-19 21:14:09,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 21:14:09,050 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-19 21:14:09,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:14:09,070 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2019-11-19 21:14:09,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-19 21:14:09,071 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-19 21:14:09,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:14:09,082 INFO L225 Difference]: With dead ends: 30 [2019-11-19 21:14:09,082 INFO L226 Difference]: Without dead ends: 13 [2019-11-19 21:14:09,086 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 21:14:09,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-19 21:14:09,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-19 21:14:09,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-19 21:14:09,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-19 21:14:09,117 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-11-19 21:14:09,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:14:09,118 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-19 21:14:09,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-19 21:14:09,118 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-19 21:14:09,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-19 21:14:09,119 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:09,119 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:09,120 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:09,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:09,120 INFO L82 PathProgramCache]: Analyzing trace with hash 672236885, now seen corresponding path program 1 times [2019-11-19 21:14:09,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:09,121 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200961767] [2019-11-19 21:14:09,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:09,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200961767] [2019-11-19 21:14:09,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 21:14:09,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-19 21:14:09,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746157296] [2019-11-19 21:14:09,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 21:14:09,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:14:09,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 21:14:09,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 21:14:09,182 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-11-19 21:14:09,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:14:09,209 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-11-19 21:14:09,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 21:14:09,211 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-19 21:14:09,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:14:09,212 INFO L225 Difference]: With dead ends: 24 [2019-11-19 21:14:09,212 INFO L226 Difference]: Without dead ends: 15 [2019-11-19 21:14:09,213 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 21:14:09,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-19 21:14:09,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-19 21:14:09,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-19 21:14:09,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-19 21:14:09,220 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2019-11-19 21:14:09,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:14:09,221 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-19 21:14:09,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 21:14:09,221 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-19 21:14:09,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-19 21:14:09,222 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:09,222 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:09,222 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:09,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:09,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1835948819, now seen corresponding path program 1 times [2019-11-19 21:14:09,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:09,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014778877] [2019-11-19 21:14:09,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:09,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:09,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014778877] [2019-11-19 21:14:09,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464879671] [2019-11-19 21:14:09,332 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 [2019-11-19 21:14:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:09,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 21:14:09,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:14:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:09,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:14:09,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-19 21:14:09,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918942878] [2019-11-19 21:14:09,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 21:14:09,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:14:09,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 21:14:09,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-19 21:14:09,430 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-11-19 21:14:09,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:14:09,465 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-11-19 21:14:09,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 21:14:09,466 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-19 21:14:09,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:14:09,467 INFO L225 Difference]: With dead ends: 26 [2019-11-19 21:14:09,467 INFO L226 Difference]: Without dead ends: 17 [2019-11-19 21:14:09,468 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-19 21:14:09,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-19 21:14:09,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-19 21:14:09,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-19 21:14:09,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-19 21:14:09,473 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2019-11-19 21:14:09,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:14:09,473 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-19 21:14:09,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 21:14:09,474 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-19 21:14:09,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-19 21:14:09,474 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:09,475 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:09,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:14:09,676 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:09,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:09,677 INFO L82 PathProgramCache]: Analyzing trace with hash -823346863, now seen corresponding path program 2 times [2019-11-19 21:14:09,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:09,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303509763] [2019-11-19 21:14:09,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:09,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:09,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303509763] [2019-11-19 21:14:09,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191336974] [2019-11-19 21:14:09,755 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 [2019-11-19 21:14:09,828 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 21:14:09,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:14:09,830 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 21:14:09,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:14:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:09,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:14:09,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-19 21:14:09,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137643981] [2019-11-19 21:14:09,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 21:14:09,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:14:09,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 21:14:09,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-19 21:14:09,860 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2019-11-19 21:14:09,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:14:09,900 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2019-11-19 21:14:09,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 21:14:09,901 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-19 21:14:09,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:14:09,902 INFO L225 Difference]: With dead ends: 28 [2019-11-19 21:14:09,902 INFO L226 Difference]: Without dead ends: 19 [2019-11-19 21:14:09,903 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-19 21:14:09,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-19 21:14:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-11-19 21:14:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-19 21:14:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-19 21:14:09,908 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2019-11-19 21:14:09,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:14:09,909 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-19 21:14:09,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 21:14:09,909 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-19 21:14:09,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-19 21:14:09,910 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:09,911 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:10,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:14:10,112 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:10,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:10,112 INFO L82 PathProgramCache]: Analyzing trace with hash -900956145, now seen corresponding path program 3 times [2019-11-19 21:14:10,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:10,113 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013903353] [2019-11-19 21:14:10,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:10,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013903353] [2019-11-19 21:14:10,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555342961] [2019-11-19 21:14:10,217 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 [2019-11-19 21:14:10,281 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-19 21:14:10,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:14:10,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 21:14:10,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:14:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:10,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:14:10,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-19 21:14:10,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703483610] [2019-11-19 21:14:10,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 21:14:10,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:14:10,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 21:14:10,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-19 21:14:10,304 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2019-11-19 21:14:10,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:14:10,339 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-11-19 21:14:10,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 21:14:10,339 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-19 21:14:10,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:14:10,340 INFO L225 Difference]: With dead ends: 30 [2019-11-19 21:14:10,340 INFO L226 Difference]: Without dead ends: 21 [2019-11-19 21:14:10,341 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-19 21:14:10,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-19 21:14:10,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-19 21:14:10,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-19 21:14:10,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-19 21:14:10,346 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2019-11-19 21:14:10,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:14:10,347 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-19 21:14:10,347 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 21:14:10,347 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-19 21:14:10,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-19 21:14:10,348 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:10,348 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:10,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:14:10,552 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:10,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:10,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1825935181, now seen corresponding path program 4 times [2019-11-19 21:14:10,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:10,555 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021546374] [2019-11-19 21:14:10,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:10,643 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021546374] [2019-11-19 21:14:10,643 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94956396] [2019-11-19 21:14:10,643 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 [2019-11-19 21:14:10,689 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 21:14:10,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:14:10,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 21:14:10,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:14:10,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:10,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:14:10,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-19 21:14:10,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503035952] [2019-11-19 21:14:10,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 21:14:10,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:14:10,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 21:14:10,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-19 21:14:10,718 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2019-11-19 21:14:10,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:14:10,765 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-11-19 21:14:10,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 21:14:10,766 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-11-19 21:14:10,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:14:10,767 INFO L225 Difference]: With dead ends: 32 [2019-11-19 21:14:10,767 INFO L226 Difference]: Without dead ends: 23 [2019-11-19 21:14:10,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-19 21:14:10,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-19 21:14:10,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-19 21:14:10,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-19 21:14:10,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-11-19 21:14:10,772 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2019-11-19 21:14:10,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:14:10,773 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-11-19 21:14:10,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 21:14:10,773 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-11-19 21:14:10,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-19 21:14:10,774 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:10,774 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:10,975 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:14:10,982 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:10,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:10,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1856518389, now seen corresponding path program 5 times [2019-11-19 21:14:10,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:10,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532532221] [2019-11-19 21:14:10,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:11,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532532221] [2019-11-19 21:14:11,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069584663] [2019-11-19 21:14:11,098 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 [2019-11-19 21:14:11,168 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-19 21:14:11,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:14:11,170 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 21:14:11,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:14:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:11,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:14:11,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-19 21:14:11,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113579784] [2019-11-19 21:14:11,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-19 21:14:11,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:14:11,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-19 21:14:11,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-19 21:14:11,205 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2019-11-19 21:14:11,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:14:11,248 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-11-19 21:14:11,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-19 21:14:11,249 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-11-19 21:14:11,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:14:11,249 INFO L225 Difference]: With dead ends: 34 [2019-11-19 21:14:11,250 INFO L226 Difference]: Without dead ends: 25 [2019-11-19 21:14:11,250 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-19 21:14:11,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-19 21:14:11,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-19 21:14:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-19 21:14:11,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-11-19 21:14:11,259 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2019-11-19 21:14:11,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:14:11,259 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-11-19 21:14:11,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-19 21:14:11,260 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-11-19 21:14:11,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-19 21:14:11,261 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:11,261 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:11,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:14:11,465 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:11,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:11,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1641347255, now seen corresponding path program 6 times [2019-11-19 21:14:11,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:11,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692463955] [2019-11-19 21:14:11,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:11,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692463955] [2019-11-19 21:14:11,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747729771] [2019-11-19 21:14:11,574 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 [2019-11-19 21:14:11,693 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-19 21:14:11,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:14:11,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-19 21:14:11,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:14:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:11,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:14:11,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-19 21:14:11,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579350727] [2019-11-19 21:14:11,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-19 21:14:11,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:14:11,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-19 21:14:11,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-19 21:14:11,720 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2019-11-19 21:14:11,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:14:11,762 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-11-19 21:14:11,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-19 21:14:11,762 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-19 21:14:11,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:14:11,763 INFO L225 Difference]: With dead ends: 36 [2019-11-19 21:14:11,763 INFO L226 Difference]: Without dead ends: 27 [2019-11-19 21:14:11,764 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-19 21:14:11,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-19 21:14:11,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-11-19 21:14:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-19 21:14:11,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-19 21:14:11,768 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2019-11-19 21:14:11,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:14:11,768 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-19 21:14:11,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-19 21:14:11,769 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-19 21:14:11,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-19 21:14:11,770 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:11,770 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:11,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:14:11,974 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:11,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:11,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1020317689, now seen corresponding path program 7 times [2019-11-19 21:14:11,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:11,976 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585509137] [2019-11-19 21:14:11,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:12,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585509137] [2019-11-19 21:14:12,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437363508] [2019-11-19 21:14:12,087 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 [2019-11-19 21:14:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:12,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-19 21:14:12,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:14:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:12,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:14:12,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-19 21:14:12,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226332475] [2019-11-19 21:14:12,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-19 21:14:12,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:14:12,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-19 21:14:12,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-19 21:14:12,174 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2019-11-19 21:14:12,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:14:12,222 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2019-11-19 21:14:12,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 21:14:12,224 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-11-19 21:14:12,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:14:12,224 INFO L225 Difference]: With dead ends: 38 [2019-11-19 21:14:12,224 INFO L226 Difference]: Without dead ends: 29 [2019-11-19 21:14:12,225 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-19 21:14:12,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-19 21:14:12,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-19 21:14:12,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-19 21:14:12,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-11-19 21:14:12,230 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2019-11-19 21:14:12,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:14:12,230 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-11-19 21:14:12,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-19 21:14:12,230 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-11-19 21:14:12,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-19 21:14:12,231 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:12,231 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:12,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:14:12,443 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:12,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:12,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1211358907, now seen corresponding path program 8 times [2019-11-19 21:14:12,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:12,445 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454020721] [2019-11-19 21:14:12,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:12,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454020721] [2019-11-19 21:14:12,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552753648] [2019-11-19 21:14:12,570 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 [2019-11-19 21:14:12,617 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 21:14:12,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:14:12,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-19 21:14:12,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:14:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:12,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:14:12,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-19 21:14:12,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861779018] [2019-11-19 21:14:12,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-19 21:14:12,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:14:12,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-19 21:14:12,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-19 21:14:12,638 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2019-11-19 21:14:12,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:14:12,686 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2019-11-19 21:14:12,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-19 21:14:12,687 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-11-19 21:14:12,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:14:12,688 INFO L225 Difference]: With dead ends: 40 [2019-11-19 21:14:12,688 INFO L226 Difference]: Without dead ends: 31 [2019-11-19 21:14:12,688 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-19 21:14:12,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-19 21:14:12,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-19 21:14:12,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-19 21:14:12,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-11-19 21:14:12,694 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2019-11-19 21:14:12,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:14:12,694 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-11-19 21:14:12,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-19 21:14:12,695 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-11-19 21:14:12,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-19 21:14:12,696 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:12,696 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:12,903 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:14:12,904 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:12,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:12,905 INFO L82 PathProgramCache]: Analyzing trace with hash -118375677, now seen corresponding path program 9 times [2019-11-19 21:14:12,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:12,906 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865538449] [2019-11-19 21:14:12,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:13,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865538449] [2019-11-19 21:14:13,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602211256] [2019-11-19 21:14:13,025 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 [2019-11-19 21:14:13,297 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-19 21:14:13,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:14:13,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-19 21:14:13,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:14:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:13,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:14:13,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-19 21:14:13,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999619006] [2019-11-19 21:14:13,340 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-19 21:14:13,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:14:13,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-19 21:14:13,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-19 21:14:13,342 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2019-11-19 21:14:13,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:14:13,434 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2019-11-19 21:14:13,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-19 21:14:13,436 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2019-11-19 21:14:13,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:14:13,437 INFO L225 Difference]: With dead ends: 42 [2019-11-19 21:14:13,437 INFO L226 Difference]: Without dead ends: 33 [2019-11-19 21:14:13,437 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-19 21:14:13,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-19 21:14:13,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-11-19 21:14:13,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-19 21:14:13,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-19 21:14:13,444 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2019-11-19 21:14:13,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:14:13,444 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-19 21:14:13,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-19 21:14:13,445 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-19 21:14:13,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-19 21:14:13,446 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:13,446 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:13,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:14:13,650 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:13,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:13,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2028479167, now seen corresponding path program 10 times [2019-11-19 21:14:13,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:13,652 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096350884] [2019-11-19 21:14:13,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:13,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096350884] [2019-11-19 21:14:13,816 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081113955] [2019-11-19 21:14:13,816 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 [2019-11-19 21:14:13,872 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 21:14:13,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:14:13,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-19 21:14:13,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:14:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:13,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:14:13,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-19 21:14:13,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185594169] [2019-11-19 21:14:13,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-19 21:14:13,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:14:13,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-19 21:14:13,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-19 21:14:13,897 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 14 states. [2019-11-19 21:14:13,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:14:13,945 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2019-11-19 21:14:13,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-19 21:14:13,945 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2019-11-19 21:14:13,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:14:13,946 INFO L225 Difference]: With dead ends: 44 [2019-11-19 21:14:13,946 INFO L226 Difference]: Without dead ends: 35 [2019-11-19 21:14:13,947 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-19 21:14:13,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-19 21:14:13,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-11-19 21:14:13,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-19 21:14:13,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-11-19 21:14:13,952 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2019-11-19 21:14:13,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:14:13,952 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-11-19 21:14:13,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-19 21:14:13,953 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-11-19 21:14:13,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-19 21:14:13,954 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:13,954 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:14,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:14:14,162 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:14,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:14,162 INFO L82 PathProgramCache]: Analyzing trace with hash 608069631, now seen corresponding path program 11 times [2019-11-19 21:14:14,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:14,163 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347797265] [2019-11-19 21:14:14,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:14,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347797265] [2019-11-19 21:14:14,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387098109] [2019-11-19 21:14:14,300 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 [2019-11-19 21:14:14,562 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-19 21:14:14,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:14:14,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-19 21:14:14,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:14:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:14,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:14:14,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-19 21:14:14,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045768401] [2019-11-19 21:14:14,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-19 21:14:14,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:14:14,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-19 21:14:14,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-19 21:14:14,604 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 15 states. [2019-11-19 21:14:14,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:14:14,670 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2019-11-19 21:14:14,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-19 21:14:14,670 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2019-11-19 21:14:14,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:14:14,671 INFO L225 Difference]: With dead ends: 46 [2019-11-19 21:14:14,671 INFO L226 Difference]: Without dead ends: 37 [2019-11-19 21:14:14,672 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-19 21:14:14,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-19 21:14:14,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-11-19 21:14:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-19 21:14:14,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-11-19 21:14:14,677 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2019-11-19 21:14:14,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:14:14,677 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-11-19 21:14:14,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-19 21:14:14,678 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-11-19 21:14:14,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-19 21:14:14,679 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:14,679 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:14,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:14:14,882 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:14,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:14,883 INFO L82 PathProgramCache]: Analyzing trace with hash 300759869, now seen corresponding path program 12 times [2019-11-19 21:14:14,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:14,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168531479] [2019-11-19 21:14:14,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:15,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168531479] [2019-11-19 21:14:15,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736201997] [2019-11-19 21:14:15,038 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 [2019-11-19 21:14:16,109 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-19 21:14:16,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:14:16,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-19 21:14:16,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:14:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:16,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:14:16,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-19 21:14:16,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127276855] [2019-11-19 21:14:16,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-19 21:14:16,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:14:16,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-19 21:14:16,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-19 21:14:16,153 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 16 states. [2019-11-19 21:14:16,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:14:16,229 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2019-11-19 21:14:16,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-19 21:14:16,230 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2019-11-19 21:14:16,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:14:16,230 INFO L225 Difference]: With dead ends: 48 [2019-11-19 21:14:16,230 INFO L226 Difference]: Without dead ends: 39 [2019-11-19 21:14:16,231 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-19 21:14:16,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-19 21:14:16,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-11-19 21:14:16,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-19 21:14:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-19 21:14:16,236 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2019-11-19 21:14:16,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:14:16,236 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-19 21:14:16,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-19 21:14:16,237 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-19 21:14:16,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-19 21:14:16,238 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:16,238 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:16,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:14:16,450 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:16,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:16,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1328822011, now seen corresponding path program 13 times [2019-11-19 21:14:16,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:16,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390736389] [2019-11-19 21:14:16,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:16,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390736389] [2019-11-19 21:14:16,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270288348] [2019-11-19 21:14:16,634 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 [2019-11-19 21:14:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:16,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-19 21:14:16,710 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:14:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:16,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:14:16,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-19 21:14:16,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866915722] [2019-11-19 21:14:16,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-19 21:14:16,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:14:16,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-19 21:14:16,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-19 21:14:16,761 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 17 states. [2019-11-19 21:14:16,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:14:16,830 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2019-11-19 21:14:16,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-19 21:14:16,831 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2019-11-19 21:14:16,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:14:16,832 INFO L225 Difference]: With dead ends: 50 [2019-11-19 21:14:16,832 INFO L226 Difference]: Without dead ends: 41 [2019-11-19 21:14:16,833 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-19 21:14:16,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-19 21:14:16,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-19 21:14:16,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-19 21:14:16,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-11-19 21:14:16,838 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2019-11-19 21:14:16,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:14:16,838 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-11-19 21:14:16,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-19 21:14:16,839 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-11-19 21:14:16,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-19 21:14:16,840 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:16,840 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:17,044 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:14:17,045 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:17,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:17,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1454062393, now seen corresponding path program 14 times [2019-11-19 21:14:17,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:17,045 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146317467] [2019-11-19 21:14:17,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:17,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146317467] [2019-11-19 21:14:17,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002603774] [2019-11-19 21:14:17,298 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 [2019-11-19 21:14:17,359 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 21:14:17,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:14:17,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-19 21:14:17,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:14:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:17,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:14:17,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-19 21:14:17,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279112676] [2019-11-19 21:14:17,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-19 21:14:17,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:14:17,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-19 21:14:17,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-19 21:14:17,389 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2019-11-19 21:14:17,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:14:17,457 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2019-11-19 21:14:17,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-19 21:14:17,458 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2019-11-19 21:14:17,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:14:17,459 INFO L225 Difference]: With dead ends: 52 [2019-11-19 21:14:17,459 INFO L226 Difference]: Without dead ends: 43 [2019-11-19 21:14:17,459 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-19 21:14:17,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-19 21:14:17,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-19 21:14:17,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-19 21:14:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-11-19 21:14:17,468 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2019-11-19 21:14:17,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:14:17,469 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-11-19 21:14:17,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-19 21:14:17,469 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-11-19 21:14:17,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-19 21:14:17,471 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:17,471 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:17,674 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:14:17,675 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:17,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:17,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1550985207, now seen corresponding path program 15 times [2019-11-19 21:14:17,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:17,676 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205070342] [2019-11-19 21:14:17,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:17,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205070342] [2019-11-19 21:14:17,873 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639663912] [2019-11-19 21:14:17,873 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 [2019-11-19 21:14:19,173 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-19 21:14:19,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:14:19,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-19 21:14:19,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:14:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:19,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:14:19,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-19 21:14:19,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505687288] [2019-11-19 21:14:19,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-19 21:14:19,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:14:19,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-19 21:14:19,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-19 21:14:19,207 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 19 states. [2019-11-19 21:14:19,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:14:19,296 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2019-11-19 21:14:19,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-19 21:14:19,298 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2019-11-19 21:14:19,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:14:19,298 INFO L225 Difference]: With dead ends: 54 [2019-11-19 21:14:19,299 INFO L226 Difference]: Without dead ends: 45 [2019-11-19 21:14:19,299 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-19 21:14:19,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-19 21:14:19,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-11-19 21:14:19,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-19 21:14:19,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-19 21:14:19,312 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2019-11-19 21:14:19,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:14:19,312 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-19 21:14:19,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-19 21:14:19,312 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-19 21:14:19,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-19 21:14:19,313 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:19,313 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:19,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:14:19,525 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:19,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:19,526 INFO L82 PathProgramCache]: Analyzing trace with hash 204528949, now seen corresponding path program 16 times [2019-11-19 21:14:19,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:19,527 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702821091] [2019-11-19 21:14:19,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:19,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702821091] [2019-11-19 21:14:19,801 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573715280] [2019-11-19 21:14:19,801 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 [2019-11-19 21:14:19,864 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 21:14:19,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:14:19,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-19 21:14:19,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:14:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:19,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:14:19,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-19 21:14:19,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180964371] [2019-11-19 21:14:19,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-19 21:14:19,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:14:19,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-19 21:14:19,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-19 21:14:19,914 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 20 states. [2019-11-19 21:14:19,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:14:19,980 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2019-11-19 21:14:19,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-19 21:14:19,981 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2019-11-19 21:14:19,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:14:19,982 INFO L225 Difference]: With dead ends: 56 [2019-11-19 21:14:19,982 INFO L226 Difference]: Without dead ends: 47 [2019-11-19 21:14:19,983 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-19 21:14:19,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-19 21:14:19,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-11-19 21:14:19,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-19 21:14:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-11-19 21:14:19,987 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2019-11-19 21:14:19,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:14:19,988 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-11-19 21:14:19,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-19 21:14:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-11-19 21:14:19,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-19 21:14:19,989 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:19,989 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:20,198 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:14:20,200 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:20,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:20,201 INFO L82 PathProgramCache]: Analyzing trace with hash -954778893, now seen corresponding path program 17 times [2019-11-19 21:14:20,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:20,201 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099048541] [2019-11-19 21:14:20,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:20,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099048541] [2019-11-19 21:14:20,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762784030] [2019-11-19 21:14:20,435 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 [2019-11-19 21:14:21,521 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-19 21:14:21,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:14:21,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-19 21:14:21,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:14:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:21,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:14:21,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-19 21:14:21,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109381353] [2019-11-19 21:14:21,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-19 21:14:21,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:14:21,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-19 21:14:21,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-19 21:14:21,546 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 21 states. [2019-11-19 21:14:21,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:14:21,627 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2019-11-19 21:14:21,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-19 21:14:21,628 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2019-11-19 21:14:21,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:14:21,629 INFO L225 Difference]: With dead ends: 58 [2019-11-19 21:14:21,629 INFO L226 Difference]: Without dead ends: 49 [2019-11-19 21:14:21,630 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-19 21:14:21,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-19 21:14:21,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-11-19 21:14:21,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-19 21:14:21,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-11-19 21:14:21,634 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2019-11-19 21:14:21,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:14:21,635 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-11-19 21:14:21,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-19 21:14:21,635 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-11-19 21:14:21,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-19 21:14:21,636 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:21,636 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:21,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:14:21,838 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:21,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:21,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1641881905, now seen corresponding path program 18 times [2019-11-19 21:14:21,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:21,840 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953613093] [2019-11-19 21:14:21,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:21,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:22,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953613093] [2019-11-19 21:14:22,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822316424] [2019-11-19 21:14:22,069 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 [2019-11-19 21:14:27,414 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-19 21:14:27,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:14:27,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-19 21:14:27,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:14:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:27,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:14:27,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-19 21:14:27,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159233584] [2019-11-19 21:14:27,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-19 21:14:27,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:14:27,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-19 21:14:27,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-19 21:14:27,459 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 22 states. [2019-11-19 21:14:27,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:14:27,523 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2019-11-19 21:14:27,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-19 21:14:27,524 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2019-11-19 21:14:27,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:14:27,525 INFO L225 Difference]: With dead ends: 60 [2019-11-19 21:14:27,525 INFO L226 Difference]: Without dead ends: 51 [2019-11-19 21:14:27,525 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-19 21:14:27,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-19 21:14:27,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-11-19 21:14:27,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-19 21:14:27,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-19 21:14:27,530 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2019-11-19 21:14:27,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:14:27,530 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-19 21:14:27,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-19 21:14:27,531 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-19 21:14:27,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-19 21:14:27,531 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:27,532 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:27,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:14:27,740 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:27,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:27,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1656909807, now seen corresponding path program 19 times [2019-11-19 21:14:27,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:27,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277324216] [2019-11-19 21:14:27,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:28,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277324216] [2019-11-19 21:14:28,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009794095] [2019-11-19 21:14:28,048 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 [2019-11-19 21:14:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:14:28,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-19 21:14:28,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:14:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:14:28,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 21:14:28,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-19 21:14:28,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862851169] [2019-11-19 21:14:28,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-19 21:14:28,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:14:28,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-19 21:14:28,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-19 21:14:28,144 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 23 states. [2019-11-19 21:14:28,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:14:28,207 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2019-11-19 21:14:28,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-19 21:14:28,208 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2019-11-19 21:14:28,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:14:28,208 INFO L225 Difference]: With dead ends: 61 [2019-11-19 21:14:28,208 INFO L226 Difference]: Without dead ends: 52 [2019-11-19 21:14:28,209 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-19 21:14:28,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-19 21:14:28,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-19 21:14:28,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-19 21:14:28,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2019-11-19 21:14:28,214 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2019-11-19 21:14:28,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:14:28,214 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2019-11-19 21:14:28,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-19 21:14:28,214 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2019-11-19 21:14:28,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-19 21:14:28,215 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:14:28,215 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:14:28,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:14:28,423 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:14:28,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:14:28,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1081145555, now seen corresponding path program 20 times [2019-11-19 21:14:28,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:14:28,424 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996726179] [2019-11-19 21:14:28,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:14:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 21:14:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 21:14:28,586 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 21:14:28,586 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-19 21:14:28,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 09:14:28 BoogieIcfgContainer [2019-11-19 21:14:28,645 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 21:14:28,645 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 21:14:28,646 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 21:14:28,646 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 21:14:28,646 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:14:08" (3/4) ... [2019-11-19 21:14:28,648 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-19 21:14:28,717 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-19 21:14:28,717 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 21:14:28,719 INFO L168 Benchmark]: Toolchain (without parser) took 20875.98 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 292.6 MB). Free memory was 960.4 MB in the beginning and 976.7 MB in the end (delta: -16.4 MB). Peak memory consumption was 276.2 MB. Max. memory is 11.5 GB. [2019-11-19 21:14:28,720 INFO L168 Benchmark]: CDTParser took 0.28 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. [2019-11-19 21:14:28,721 INFO L168 Benchmark]: CACSL2BoogieTranslator took 405.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 960.4 MB in the beginning and 1.1 GB in the end (delta: -171.0 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. [2019-11-19 21:14:28,721 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.78 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 21:14:28,721 INFO L168 Benchmark]: Boogie Preprocessor took 29.45 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-19 21:14:28,722 INFO L168 Benchmark]: RCFGBuilder took 308.29 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: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. [2019-11-19 21:14:28,722 INFO L168 Benchmark]: TraceAbstraction took 20015.54 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 157.8 MB). Free memory was 1.1 GB in the beginning and 976.7 MB in the end (delta: 127.8 MB). Peak memory consumption was 285.6 MB. Max. memory is 11.5 GB. [2019-11-19 21:14:28,723 INFO L168 Benchmark]: Witness Printer took 71.71 ms. Allocated memory is still 1.3 GB. Free memory is still 976.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 21:14:28,725 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 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 405.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 960.4 MB in the beginning and 1.1 GB in the end (delta: -171.0 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 39.78 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.45 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 308.29 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: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 20015.54 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 157.8 MB). Free memory was 1.1 GB in the beginning and 976.7 MB in the end (delta: 127.8 MB). Peak memory consumption was 285.6 MB. Max. memory is 11.5 GB. * Witness Printer took 71.71 ms. Allocated memory is still 1.3 GB. Free memory is still 976.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND FALSE !(j<20) [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) [L27] COND FALSE !(i < *pa) [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Result: UNSAFE, OverallTime: 19.9s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 259 SDtfs, 210 SDslu, 1430 SDs, 0 SdLazy, 618 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 822 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred 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, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 10.0s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 1250 NumberOfCodeBlocks, 1250 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 1159 ConstructedInterpolants, 0 QuantifiedInterpolants, 95961 SizeOfPredicates, 19 NumberOfNonLiveVariables, 2660 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4940 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 incorrect! Received shutdown request...