./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test27-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -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/test27-2.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(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2292364e3df3925555991c57490c078c89b959e0 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.1.25-9a8b2e8 [2020-10-20 00:44:01,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:44:01,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:44:01,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:44:01,576 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:44:01,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:44:01,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:44:01,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:44:01,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:44:01,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:44:01,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:44:01,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:44:01,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:44:01,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:44:01,603 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:44:01,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:44:01,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:44:01,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:44:01,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:44:01,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:44:01,620 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:44:01,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:44:01,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:44:01,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:44:01,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:44:01,642 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:44:01,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:44:01,654 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:44:01,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:44:01,656 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:44:01,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:44:01,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:44:01,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:44:01,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:44:01,658 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:44:01,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:44:01,659 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:44:01,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:44:01,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:44:01,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:44:01,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:44:01,663 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:44:01,701 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:44:01,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:44:01,704 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:44:01,704 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:44:01,704 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:44:01,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:44:01,705 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:44:01,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:44:01,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:44:01,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:44:01,707 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:44:01,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:44:01,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:44:01,708 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:44:01,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:44:01,708 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:44:01,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:44:01,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:44:01,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:44:01,709 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:44:01,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:44:01,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:44:01,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:44:01,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:44:01,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:44:01,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:44:01,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:44:01,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:44:01,711 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:44:01,712 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(reach_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 -> 2292364e3df3925555991c57490c078c89b959e0 [2020-10-20 00:44:01,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:44:01,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:44:01,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:44:01,937 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:44:01,938 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:44:01,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test27-2.c [2020-10-20 00:44:02,007 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5d9cabb9/f62b963dc6c64a34af78fd4e93a751d0/FLAG8e60fe4aa [2020-10-20 00:44:02,443 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:44:02,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test27-2.c [2020-10-20 00:44:02,451 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5d9cabb9/f62b963dc6c64a34af78fd4e93a751d0/FLAG8e60fe4aa [2020-10-20 00:44:02,835 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5d9cabb9/f62b963dc6c64a34af78fd4e93a751d0 [2020-10-20 00:44:02,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:44:02,854 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:44:02,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:44:02,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:44:02,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:44:02,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:44:02" (1/1) ... [2020-10-20 00:44:02,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7586596e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:02, skipping insertion in model container [2020-10-20 00:44:02,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:44:02" (1/1) ... [2020-10-20 00:44:02,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:44:02,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:44:03,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:44:03,150 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:44:03,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:44:03,195 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:44:03,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:03 WrapperNode [2020-10-20 00:44:03,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:44:03,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:44:03,197 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:44:03,197 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:44:03,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:03" (1/1) ... [2020-10-20 00:44:03,216 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:03" (1/1) ... [2020-10-20 00:44:03,238 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:44:03,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:44:03,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:44:03,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:44:03,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:03" (1/1) ... [2020-10-20 00:44:03,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:03" (1/1) ... [2020-10-20 00:44:03,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:03" (1/1) ... [2020-10-20 00:44:03,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:03" (1/1) ... [2020-10-20 00:44:03,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:03" (1/1) ... [2020-10-20 00:44:03,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:03" (1/1) ... [2020-10-20 00:44:03,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:03" (1/1) ... [2020-10-20 00:44:03,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:44:03,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:44:03,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:44:03,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:44:03,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:03" (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 [2020-10-20 00:44:03,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-20 00:44:03,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:44:03,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-20 00:44:03,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:44:03,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 00:44:03,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:44:03,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:44:03,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:44:03,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:44:03,648 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:44:03,648 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-20 00:44:03,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:44:03 BoogieIcfgContainer [2020-10-20 00:44:03,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:44:03,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:44:03,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:44:03,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:44:03,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:44:02" (1/3) ... [2020-10-20 00:44:03,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f39749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:44:03, skipping insertion in model container [2020-10-20 00:44:03,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:03" (2/3) ... [2020-10-20 00:44:03,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f39749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:44:03, skipping insertion in model container [2020-10-20 00:44:03,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:44:03" (3/3) ... [2020-10-20 00:44:03,659 INFO L111 eAbstractionObserver]: Analyzing ICFG test27-2.c [2020-10-20 00:44:03,672 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:44:03,680 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:44:03,695 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:44:03,728 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:44:03,728 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:44:03,729 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:44:03,729 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:44:03,729 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:44:03,730 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:44:03,741 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:44:03,742 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:44:03,761 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-20 00:44:03,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 00:44:03,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:03,773 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:03,773 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:03,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:03,783 INFO L82 PathProgramCache]: Analyzing trace with hash -631347226, now seen corresponding path program 1 times [2020-10-20 00:44:03,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:03,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184133222] [2020-10-20 00:44:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:04,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184133222] [2020-10-20 00:44:04,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:44:04,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:44:04,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711213174] [2020-10-20 00:44:04,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:44:04,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:04,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:44:04,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:44:04,047 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-10-20 00:44:04,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:04,070 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2020-10-20 00:44:04,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:44:04,072 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-20 00:44:04,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:04,085 INFO L225 Difference]: With dead ends: 31 [2020-10-20 00:44:04,085 INFO L226 Difference]: Without dead ends: 13 [2020-10-20 00:44:04,089 INFO L677 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 [2020-10-20 00:44:04,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-20 00:44:04,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-20 00:44:04,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-20 00:44:04,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-20 00:44:04,132 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-10-20 00:44:04,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:04,133 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-20 00:44:04,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:44:04,133 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-20 00:44:04,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:44:04,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:04,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:04,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:44:04,135 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:04,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:04,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1697064536, now seen corresponding path program 1 times [2020-10-20 00:44:04,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:04,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507103151] [2020-10-20 00:44:04,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:04,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507103151] [2020-10-20 00:44:04,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:44:04,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:44:04,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104600653] [2020-10-20 00:44:04,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:44:04,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:04,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:44:04,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:44:04,278 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-10-20 00:44:04,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:04,312 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-20 00:44:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:44:04,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-20 00:44:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:04,315 INFO L225 Difference]: With dead ends: 24 [2020-10-20 00:44:04,315 INFO L226 Difference]: Without dead ends: 15 [2020-10-20 00:44:04,316 INFO L677 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 [2020-10-20 00:44:04,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-20 00:44:04,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-10-20 00:44:04,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-20 00:44:04,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-20 00:44:04,321 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-10-20 00:44:04,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:04,322 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-20 00:44:04,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:44:04,322 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-20 00:44:04,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 00:44:04,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:04,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:04,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:44:04,324 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:04,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:04,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1434190826, now seen corresponding path program 1 times [2020-10-20 00:44:04,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:04,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259951275] [2020-10-20 00:44:04,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:04,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259951275] [2020-10-20 00:44:04,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589233907] [2020-10-20 00:44:04,382 INFO L95 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 [2020-10-20 00:44:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:04,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 00:44:04,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:04,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:04,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-20 00:44:04,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812452731] [2020-10-20 00:44:04,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:44:04,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:04,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:44:04,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:44:04,560 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-10-20 00:44:04,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:04,589 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-20 00:44:04,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:44:04,590 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-20 00:44:04,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:04,591 INFO L225 Difference]: With dead ends: 26 [2020-10-20 00:44:04,591 INFO L226 Difference]: Without dead ends: 17 [2020-10-20 00:44:04,592 INFO L677 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 [2020-10-20 00:44:04,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-20 00:44:04,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-10-20 00:44:04,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-20 00:44:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-20 00:44:04,596 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-10-20 00:44:04,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:04,597 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-20 00:44:04,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:44:04,597 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-20 00:44:04,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 00:44:04,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:04,598 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:04,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-20 00:44:04,800 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:04,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:04,801 INFO L82 PathProgramCache]: Analyzing trace with hash 201480788, now seen corresponding path program 2 times [2020-10-20 00:44:04,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:04,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338710957] [2020-10-20 00:44:04,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:04,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338710957] [2020-10-20 00:44:04,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972958613] [2020-10-20 00:44:04,900 INFO L93 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 [2020-10-20 00:44:05,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 00:44:05,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:05,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 00:44:05,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:05,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:05,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-20 00:44:05,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406886042] [2020-10-20 00:44:05,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:44:05,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:05,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:44:05,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:44:05,052 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-10-20 00:44:05,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:05,081 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-10-20 00:44:05,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:44:05,082 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-20 00:44:05,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:05,083 INFO L225 Difference]: With dead ends: 28 [2020-10-20 00:44:05,083 INFO L226 Difference]: Without dead ends: 19 [2020-10-20 00:44:05,083 INFO L677 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 [2020-10-20 00:44:05,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-20 00:44:05,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-20 00:44:05,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-20 00:44:05,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-20 00:44:05,088 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-10-20 00:44:05,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:05,088 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-20 00:44:05,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:44:05,089 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-20 00:44:05,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 00:44:05,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:05,090 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:05,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:05,303 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:05,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:05,303 INFO L82 PathProgramCache]: Analyzing trace with hash 123871506, now seen corresponding path program 3 times [2020-10-20 00:44:05,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:05,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895020068] [2020-10-20 00:44:05,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:05,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895020068] [2020-10-20 00:44:05,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824184262] [2020-10-20 00:44:05,388 INFO L93 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 [2020-10-20 00:44:05,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-20 00:44:05,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:05,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 00:44:05,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:05,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:05,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 00:44:05,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120345224] [2020-10-20 00:44:05,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 00:44:05,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:05,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 00:44:05,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:44:05,622 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-10-20 00:44:05,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:05,655 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-20 00:44:05,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:44:05,657 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-20 00:44:05,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:05,657 INFO L225 Difference]: With dead ends: 30 [2020-10-20 00:44:05,658 INFO L226 Difference]: Without dead ends: 21 [2020-10-20 00:44:05,658 INFO L677 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 [2020-10-20 00:44:05,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-20 00:44:05,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-20 00:44:05,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-20 00:44:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-20 00:44:05,663 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-20 00:44:05,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:05,663 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-20 00:44:05,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 00:44:05,663 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-20 00:44:05,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 00:44:05,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:05,665 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:05,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:05,879 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:05,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:05,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1444204464, now seen corresponding path program 4 times [2020-10-20 00:44:05,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:05,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83316386] [2020-10-20 00:44:05,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:06,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83316386] [2020-10-20 00:44:06,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784418705] [2020-10-20 00:44:06,006 INFO L93 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 [2020-10-20 00:44:06,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 00:44:06,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:06,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 00:44:06,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:06,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:06,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 00:44:06,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132876915] [2020-10-20 00:44:06,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 00:44:06,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:06,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 00:44:06,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:44:06,118 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-10-20 00:44:06,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:06,163 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-20 00:44:06,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 00:44:06,164 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-20 00:44:06,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:06,165 INFO L225 Difference]: With dead ends: 32 [2020-10-20 00:44:06,165 INFO L226 Difference]: Without dead ends: 23 [2020-10-20 00:44:06,165 INFO L677 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 [2020-10-20 00:44:06,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-20 00:44:06,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-20 00:44:06,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-20 00:44:06,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-20 00:44:06,169 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-10-20 00:44:06,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:06,169 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-20 00:44:06,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 00:44:06,169 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-20 00:44:06,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 00:44:06,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:06,170 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:06,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:06,381 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:06,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:06,382 INFO L82 PathProgramCache]: Analyzing trace with hash -831690738, now seen corresponding path program 5 times [2020-10-20 00:44:06,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:06,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898732965] [2020-10-20 00:44:06,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:06,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898732965] [2020-10-20 00:44:06,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422142631] [2020-10-20 00:44:06,471 INFO L93 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 [2020-10-20 00:44:06,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-20 00:44:06,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:06,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 00:44:06,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:06,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:06,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 00:44:06,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109085582] [2020-10-20 00:44:06,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 00:44:06,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:06,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 00:44:06,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-20 00:44:06,762 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2020-10-20 00:44:06,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:06,809 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-20 00:44:06,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 00:44:06,810 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-20 00:44:06,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:06,811 INFO L225 Difference]: With dead ends: 34 [2020-10-20 00:44:06,811 INFO L226 Difference]: Without dead ends: 25 [2020-10-20 00:44:06,812 INFO L677 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 [2020-10-20 00:44:06,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-20 00:44:06,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-20 00:44:06,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 00:44:06,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-20 00:44:06,817 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-10-20 00:44:06,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:06,817 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-20 00:44:06,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 00:44:06,818 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-20 00:44:06,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 00:44:06,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:06,819 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:07,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-20 00:44:07,030 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:07,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:07,030 INFO L82 PathProgramCache]: Analyzing trace with hash -616519604, now seen corresponding path program 6 times [2020-10-20 00:44:07,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:07,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740635033] [2020-10-20 00:44:07,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:07,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740635033] [2020-10-20 00:44:07,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233647166] [2020-10-20 00:44:07,160 INFO L93 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 [2020-10-20 00:44:08,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-20 00:44:08,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:08,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 00:44:08,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:08,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:08,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 00:44:08,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131289994] [2020-10-20 00:44:08,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 00:44:08,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:08,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 00:44:08,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:44:08,564 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-10-20 00:44:08,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:08,621 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-20 00:44:08,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 00:44:08,623 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-20 00:44:08,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:08,624 INFO L225 Difference]: With dead ends: 36 [2020-10-20 00:44:08,624 INFO L226 Difference]: Without dead ends: 27 [2020-10-20 00:44:08,625 INFO L677 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 [2020-10-20 00:44:08,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-20 00:44:08,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-20 00:44:08,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-20 00:44:08,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-20 00:44:08,629 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2020-10-20 00:44:08,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:08,630 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-20 00:44:08,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 00:44:08,630 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-20 00:44:08,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 00:44:08,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:08,631 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:08,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:08,844 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:08,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:08,845 INFO L82 PathProgramCache]: Analyzing trace with hash 4509962, now seen corresponding path program 7 times [2020-10-20 00:44:08,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:08,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782760622] [2020-10-20 00:44:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:08,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:08,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782760622] [2020-10-20 00:44:08,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202063358] [2020-10-20 00:44:08,944 INFO L93 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 [2020-10-20 00:44:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:09,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 00:44:09,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:09,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:09,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-20 00:44:09,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63826196] [2020-10-20 00:44:09,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 00:44:09,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:09,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 00:44:09,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-20 00:44:09,046 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2020-10-20 00:44:09,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:09,107 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-20 00:44:09,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 00:44:09,108 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-20 00:44:09,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:09,109 INFO L225 Difference]: With dead ends: 38 [2020-10-20 00:44:09,109 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 00:44:09,110 INFO L677 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 [2020-10-20 00:44:09,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 00:44:09,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-20 00:44:09,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:44:09,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-20 00:44:09,114 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-10-20 00:44:09,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:09,115 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-20 00:44:09,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 00:44:09,115 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-20 00:44:09,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 00:44:09,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:09,116 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:09,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:09,327 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:09,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:09,328 INFO L82 PathProgramCache]: Analyzing trace with hash -186531256, now seen corresponding path program 8 times [2020-10-20 00:44:09,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:09,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350691956] [2020-10-20 00:44:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:09,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350691956] [2020-10-20 00:44:09,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723109251] [2020-10-20 00:44:09,428 INFO L93 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 [2020-10-20 00:44:09,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 00:44:09,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:09,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 00:44:09,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:09,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:09,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-20 00:44:09,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900519588] [2020-10-20 00:44:09,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 00:44:09,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:09,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 00:44:09,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-20 00:44:09,600 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2020-10-20 00:44:09,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:09,671 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-20 00:44:09,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 00:44:09,672 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-20 00:44:09,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:09,673 INFO L225 Difference]: With dead ends: 40 [2020-10-20 00:44:09,673 INFO L226 Difference]: Without dead ends: 31 [2020-10-20 00:44:09,677 INFO L677 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 [2020-10-20 00:44:09,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-20 00:44:09,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-20 00:44:09,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 00:44:09,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-20 00:44:09,686 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-10-20 00:44:09,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:09,687 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-20 00:44:09,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 00:44:09,687 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-20 00:44:09,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-20 00:44:09,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:09,689 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:09,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-20 00:44:09,901 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:09,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:09,902 INFO L82 PathProgramCache]: Analyzing trace with hash 906451974, now seen corresponding path program 9 times [2020-10-20 00:44:09,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:09,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775803524] [2020-10-20 00:44:09,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:10,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775803524] [2020-10-20 00:44:10,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891052023] [2020-10-20 00:44:10,033 INFO L93 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 [2020-10-20 00:44:16,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-20 00:44:16,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:16,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 00:44:16,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:16,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:16,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-20 00:44:16,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888882847] [2020-10-20 00:44:16,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 00:44:16,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:16,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 00:44:16,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-20 00:44:16,186 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2020-10-20 00:44:16,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:16,263 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-20 00:44:16,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 00:44:16,264 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-20 00:44:16,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:16,265 INFO L225 Difference]: With dead ends: 41 [2020-10-20 00:44:16,265 INFO L226 Difference]: Without dead ends: 32 [2020-10-20 00:44:16,266 INFO L677 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 [2020-10-20 00:44:16,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-20 00:44:16,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-20 00:44:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-20 00:44:16,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-20 00:44:16,271 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2020-10-20 00:44:16,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:16,271 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-20 00:44:16,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 00:44:16,271 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-20 00:44:16,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-20 00:44:16,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:16,273 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:16,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:16,474 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:16,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:16,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1003651516, now seen corresponding path program 10 times [2020-10-20 00:44:16,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:16,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409180224] [2020-10-20 00:44:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:44:16,728 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:44:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:44:16,882 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:44:16,919 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:44:16,919 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:44:16,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-20 00:44:16,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:44:16 BoogieIcfgContainer [2020-10-20 00:44:16,987 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:44:16,988 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:44:16,988 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:44:16,988 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:44:16,989 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:44:03" (3/4) ... [2020-10-20 00:44:16,992 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:44:17,105 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:44:17,106 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:44:17,108 INFO L168 Benchmark]: Toolchain (without parser) took 14258.72 ms. Allocated memory was 37.2 MB in the beginning and 69.7 MB in the end (delta: 32.5 MB). Free memory was 19.3 MB in the beginning and 21.4 MB in the end (delta: -2.1 MB). Peak memory consumption was 30.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:17,109 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 34.1 MB. Free memory was 11.2 MB in the beginning and 11.1 MB in the end (delta: 47.4 kB). Peak memory consumption was 47.4 kB. Max. memory is 14.3 GB. [2020-10-20 00:44:17,109 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.84 ms. Allocated memory was 37.2 MB in the beginning and 45.1 MB in the end (delta: 7.9 MB). Free memory was 18.6 MB in the beginning and 26.3 MB in the end (delta: -7.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:17,110 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.69 ms. Allocated memory is still 45.1 MB. Free memory was 26.1 MB in the beginning and 24.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:17,110 INFO L168 Benchmark]: Boogie Preprocessor took 33.54 ms. Allocated memory is still 45.1 MB. Free memory was 24.1 MB in the beginning and 22.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:17,111 INFO L168 Benchmark]: RCFGBuilder took 378.14 ms. Allocated memory was 45.1 MB in the beginning and 47.2 MB in the end (delta: 2.1 MB). Free memory was 22.4 MB in the beginning and 16.0 MB in the end (delta: 6.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:17,113 INFO L168 Benchmark]: TraceAbstraction took 13335.96 ms. Allocated memory was 47.2 MB in the beginning and 69.7 MB in the end (delta: 22.5 MB). Free memory was 15.6 MB in the beginning and 25.6 MB in the end (delta: -10.0 MB). Peak memory consumption was 26.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:17,116 INFO L168 Benchmark]: Witness Printer took 118.00 ms. Allocated memory is still 69.7 MB. Free memory was 25.6 MB in the beginning and 21.4 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:17,120 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 34.1 MB. Free memory was 11.2 MB in the beginning and 11.1 MB in the end (delta: 47.4 kB). Peak memory consumption was 47.4 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 340.84 ms. Allocated memory was 37.2 MB in the beginning and 45.1 MB in the end (delta: 7.9 MB). Free memory was 18.6 MB in the beginning and 26.3 MB in the end (delta: -7.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 41.69 ms. Allocated memory is still 45.1 MB. Free memory was 26.1 MB in the beginning and 24.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 33.54 ms. Allocated memory is still 45.1 MB. Free memory was 24.1 MB in the beginning and 22.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * RCFGBuilder took 378.14 ms. Allocated memory was 45.1 MB in the beginning and 47.2 MB in the end (delta: 2.1 MB). Free memory was 22.4 MB in the beginning and 16.0 MB in the end (delta: 6.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. * TraceAbstraction took 13335.96 ms. Allocated memory was 47.2 MB in the beginning and 69.7 MB in the end (delta: 22.5 MB). Free memory was 15.6 MB in the beginning and 25.6 MB in the end (delta: -10.0 MB). Peak memory consumption was 26.3 MB. Max. memory is 14.3 GB. * Witness Printer took 118.00 ms. Allocated memory is still 69.7 MB. Free memory was 25.6 MB in the beginning and 21.4 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] struct cont cont; [L24] struct dummy dummy; [L25] struct dummy *dummies[10]; [L26] int a[10]; [L27] int i, *pa; [L28] i = __VERIFIER_nondet_int() [L29] int j = 0; [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND FALSE !(j < 10) [L36] COND TRUE i >= 0 && i < 9 [L37] a[i] = i [L38] dummy.array = &a[i] [L39] dummies[i + 1] = &dummy [L40] cont.array = &dummies[0] [L41] EXPR cont.array [L41] EXPR cont.array[i] [L41] EXPR cont.array[i]->array [L41] pa = &cont.array[i]->array[i] [L42] EXPR a[i] [L42] COND TRUE a[i] > 0 [L43] EXPR dummies[i + 1] [L43] EXPR dummies[i + 1]->array [L43] EXPR dummies[i + 1]->array[i] [L43] i = dummies[i + 1]->array[i] - 10 [L44] EXPR \read(*pa) [L44] COND FALSE !(i < *pa) [L18] EXPR pc->array [L18] EXPR pc->array[i] [L18] EXPR pc->array[i]->array [L18] EXPR pc->array[i]->array[i] [L18] return pc->array[i]->array[i] == i; [L47] COND TRUE !check(&cont, i) [L3] __assert_fail("0", "test27-2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 13.1s, OverallIterations: 12, TraceHistogramMax: 10, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 140 SDtfs, 55 SDslu, 540 SDs, 0 SdLazy, 185 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 257 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 8.5s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 430 NumberOfCodeBlocks, 430 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 379 ConstructedInterpolants, 0 QuantifiedInterpolants, 16761 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1404 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 0/570 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...