./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 54858612 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_1.5.800.v20200727-1323.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 0.2.0-5485861 [2020-10-25 22:05:17,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:05:17,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:05:17,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:05:17,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:05:17,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:05:17,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:05:17,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:05:17,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:05:17,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:05:17,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:05:17,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:05:17,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:05:17,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:05:17,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:05:17,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:05:17,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:05:17,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:05:17,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:05:17,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:05:17,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:05:17,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:05:17,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:05:17,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:05:17,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:05:17,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:05:17,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:05:17,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:05:17,554 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:05:17,555 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:05:17,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:05:17,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:05:17,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:05:17,560 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:05:17,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:05:17,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:05:17,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:05:17,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:05:17,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:05:17,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:05:17,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:05:17,567 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:05:17,615 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:05:17,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:05:17,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:05:17,618 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:05:17,619 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:05:17,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:05:17,619 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:05:17,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:05:17,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:05:17,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:05:17,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:05:17,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:05:17,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:05:17,621 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:05:17,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:05:17,622 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:05:17,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:05:17,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:05:17,622 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:05:17,623 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:05:17,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:05:17,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:05:17,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:05:17,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:05:17,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:05:17,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:05:17,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:05:17,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:05:17,624 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:05:17,625 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2292364e3df3925555991c57490c078c89b959e0 [2020-10-25 22:05:18,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:05:18,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:05:18,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:05:18,094 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:05:18,096 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:05:18,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test27-2.c [2020-10-25 22:05:18,173 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d1f482a1/f5431064df854e3990bf0ef95c4df004/FLAG130eb15fc [2020-10-25 22:05:18,770 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:05:18,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test27-2.c [2020-10-25 22:05:18,781 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d1f482a1/f5431064df854e3990bf0ef95c4df004/FLAG130eb15fc [2020-10-25 22:05:19,135 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d1f482a1/f5431064df854e3990bf0ef95c4df004 [2020-10-25 22:05:19,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:05:19,152 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:05:19,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:05:19,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:05:19,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:05:19,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:05:19" (1/1) ... [2020-10-25 22:05:19,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75b0e892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:19, skipping insertion in model container [2020-10-25 22:05:19,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:05:19" (1/1) ... [2020-10-25 22:05:19,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:05:19,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:05:19,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:05:19,417 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:05:19,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:05:19,461 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:05:19,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:19 WrapperNode [2020-10-25 22:05:19,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:05:19,464 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:05:19,464 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:05:19,464 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:05:19,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:19" (1/1) ... [2020-10-25 22:05:19,483 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:19" (1/1) ... [2020-10-25 22:05:19,509 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:05:19,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:05:19,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:05:19,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:05:19,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:19" (1/1) ... [2020-10-25 22:05:19,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:19" (1/1) ... [2020-10-25 22:05:19,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:19" (1/1) ... [2020-10-25 22:05:19,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:19" (1/1) ... [2020-10-25 22:05:19,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:19" (1/1) ... [2020-10-25 22:05:19,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:19" (1/1) ... [2020-10-25 22:05:19,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:19" (1/1) ... [2020-10-25 22:05:19,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:05:19,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:05:19,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:05:19,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:05:19,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:05:19,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-25 22:05:19,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:05:19,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-25 22:05:19,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:05:19,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-25 22:05:19,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:05:19,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:05:19,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-25 22:05:19,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-25 22:05:20,071 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:05:20,072 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-25 22:05:20,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:05:20 BoogieIcfgContainer [2020-10-25 22:05:20,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:05:20,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:05:20,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:05:20,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:05:20,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:05:19" (1/3) ... [2020-10-25 22:05:20,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bfe8012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:05:20, skipping insertion in model container [2020-10-25 22:05:20,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:19" (2/3) ... [2020-10-25 22:05:20,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bfe8012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:05:20, skipping insertion in model container [2020-10-25 22:05:20,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:05:20" (3/3) ... [2020-10-25 22:05:20,101 INFO L111 eAbstractionObserver]: Analyzing ICFG test27-2.c [2020-10-25 22:05:20,126 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:05:20,132 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:05:20,147 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:05:20,170 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:05:20,171 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:05:20,171 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:05:20,171 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:05:20,171 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:05:20,171 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:05:20,171 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:05:20,171 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:05:20,183 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-25 22:05:20,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-25 22:05:20,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:20,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:20,189 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:20,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:20,195 INFO L82 PathProgramCache]: Analyzing trace with hash -631347226, now seen corresponding path program 1 times [2020-10-25 22:05:20,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:20,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831538411] [2020-10-25 22:05:20,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:20,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831538411] [2020-10-25 22:05:20,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:05:20,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 22:05:20,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664052492] [2020-10-25 22:05:20,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 22:05:20,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:20,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 22:05:20,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:05:20,446 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-10-25 22:05:20,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:20,469 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2020-10-25 22:05:20,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 22:05:20,476 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-25 22:05:20,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:20,492 INFO L225 Difference]: With dead ends: 31 [2020-10-25 22:05:20,492 INFO L226 Difference]: Without dead ends: 13 [2020-10-25 22:05:20,497 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 [2020-10-25 22:05:20,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-25 22:05:20,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-25 22:05:20,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-25 22:05:20,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-25 22:05:20,543 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-10-25 22:05:20,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:20,544 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-25 22:05:20,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 22:05:20,544 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-25 22:05:20,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 22:05:20,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:20,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:20,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:05:20,547 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:20,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:20,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1697064536, now seen corresponding path program 1 times [2020-10-25 22:05:20,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:20,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325998289] [2020-10-25 22:05:20,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:20,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325998289] [2020-10-25 22:05:20,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:05:20,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 22:05:20,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183515124] [2020-10-25 22:05:20,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 22:05:20,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:20,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 22:05:20,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:05:20,685 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-10-25 22:05:20,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:20,713 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-25 22:05:20,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 22:05:20,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-25 22:05:20,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:20,716 INFO L225 Difference]: With dead ends: 24 [2020-10-25 22:05:20,716 INFO L226 Difference]: Without dead ends: 15 [2020-10-25 22:05:20,717 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 [2020-10-25 22:05:20,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-25 22:05:20,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-10-25 22:05:20,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-25 22:05:20,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-25 22:05:20,723 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-10-25 22:05:20,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:20,723 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-25 22:05:20,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 22:05:20,724 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-25 22:05:20,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-25 22:05:20,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:20,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:20,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 22:05:20,726 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:20,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:20,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1434190826, now seen corresponding path program 1 times [2020-10-25 22:05:20,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:20,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428157413] [2020-10-25 22:05:20,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:20,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:20,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428157413] [2020-10-25 22:05:20,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254470306] [2020-10-25 22:05:20,829 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 [2020-10-25 22:05:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:20,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-25 22:05:20,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:20,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:20,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-25 22:05:20,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302552549] [2020-10-25 22:05:20,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-25 22:05:20,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:20,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-25 22:05:20,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-25 22:05:20,997 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-10-25 22:05:21,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:21,029 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-25 22:05:21,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:05:21,031 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-25 22:05:21,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:21,031 INFO L225 Difference]: With dead ends: 26 [2020-10-25 22:05:21,032 INFO L226 Difference]: Without dead ends: 17 [2020-10-25 22:05:21,032 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 [2020-10-25 22:05:21,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-25 22:05:21,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-10-25 22:05:21,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-25 22:05:21,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-25 22:05:21,037 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-10-25 22:05:21,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:21,037 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-25 22:05:21,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-25 22:05:21,038 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-25 22:05:21,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-25 22:05:21,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:21,039 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:21,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-25 22:05:21,253 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:21,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:21,254 INFO L82 PathProgramCache]: Analyzing trace with hash 201480788, now seen corresponding path program 2 times [2020-10-25 22:05:21,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:21,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879340915] [2020-10-25 22:05:21,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:21,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879340915] [2020-10-25 22:05:21,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916697162] [2020-10-25 22:05:21,340 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 [2020-10-25 22:05:21,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 22:05:21,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:05:21,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-25 22:05:21,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:21,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:21,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-25 22:05:21,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529774073] [2020-10-25 22:05:21,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 22:05:21,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:21,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 22:05:21,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-25 22:05:21,508 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-10-25 22:05:21,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:21,545 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-10-25 22:05:21,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 22:05:21,546 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-25 22:05:21,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:21,547 INFO L225 Difference]: With dead ends: 28 [2020-10-25 22:05:21,547 INFO L226 Difference]: Without dead ends: 19 [2020-10-25 22:05:21,548 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 [2020-10-25 22:05:21,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-25 22:05:21,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-25 22:05:21,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-25 22:05:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-25 22:05:21,553 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-10-25 22:05:21,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:21,553 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-25 22:05:21,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 22:05:21,554 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-25 22:05:21,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-25 22:05:21,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:21,555 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:21,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:21,768 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:21,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:21,769 INFO L82 PathProgramCache]: Analyzing trace with hash 123871506, now seen corresponding path program 3 times [2020-10-25 22:05:21,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:21,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792888417] [2020-10-25 22:05:21,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:21,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792888417] [2020-10-25 22:05:21,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019240079] [2020-10-25 22:05:21,885 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 [2020-10-25 22:05:22,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-25 22:05:22,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:05:22,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-25 22:05:22,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:22,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:22,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-25 22:05:22,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997189462] [2020-10-25 22:05:22,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-25 22:05:22,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:22,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-25 22:05:22,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-25 22:05:22,128 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-10-25 22:05:22,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:22,166 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-25 22:05:22,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 22:05:22,167 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-25 22:05:22,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:22,168 INFO L225 Difference]: With dead ends: 30 [2020-10-25 22:05:22,168 INFO L226 Difference]: Without dead ends: 21 [2020-10-25 22:05:22,169 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 [2020-10-25 22:05:22,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-25 22:05:22,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-25 22:05:22,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-25 22:05:22,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-25 22:05:22,173 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-25 22:05:22,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:22,173 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-25 22:05:22,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-25 22:05:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-25 22:05:22,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-25 22:05:22,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:22,187 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:22,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:22,400 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:22,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:22,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1444204464, now seen corresponding path program 4 times [2020-10-25 22:05:22,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:22,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738017894] [2020-10-25 22:05:22,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:22,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738017894] [2020-10-25 22:05:22,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948322040] [2020-10-25 22:05:22,525 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 [2020-10-25 22:05:22,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-25 22:05:22,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:05:22,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-25 22:05:22,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:22,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:22,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-25 22:05:22,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355163614] [2020-10-25 22:05:22,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-25 22:05:22,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:22,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-25 22:05:22,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:05:22,648 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-10-25 22:05:22,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:22,700 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-25 22:05:22,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 22:05:22,701 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-25 22:05:22,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:22,702 INFO L225 Difference]: With dead ends: 32 [2020-10-25 22:05:22,702 INFO L226 Difference]: Without dead ends: 23 [2020-10-25 22:05:22,703 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 [2020-10-25 22:05:22,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-25 22:05:22,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-25 22:05:22,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-25 22:05:22,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-25 22:05:22,707 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-10-25 22:05:22,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:22,708 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-25 22:05:22,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-25 22:05:22,708 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-25 22:05:22,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-25 22:05:22,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:22,708 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:22,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:22,921 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:22,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:22,922 INFO L82 PathProgramCache]: Analyzing trace with hash -831690738, now seen corresponding path program 5 times [2020-10-25 22:05:22,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:22,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152316161] [2020-10-25 22:05:22,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:23,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152316161] [2020-10-25 22:05:23,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396127593] [2020-10-25 22:05:23,065 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 [2020-10-25 22:05:23,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-25 22:05:23,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:05:23,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-25 22:05:23,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:23,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:23,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-25 22:05:23,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684699984] [2020-10-25 22:05:23,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-25 22:05:23,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:23,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-25 22:05:23,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-25 22:05:23,486 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2020-10-25 22:05:23,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:23,534 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-25 22:05:23,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-25 22:05:23,534 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-25 22:05:23,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:23,535 INFO L225 Difference]: With dead ends: 34 [2020-10-25 22:05:23,535 INFO L226 Difference]: Without dead ends: 25 [2020-10-25 22:05:23,536 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 [2020-10-25 22:05:23,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-25 22:05:23,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-25 22:05:23,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-25 22:05:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-25 22:05:23,541 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-10-25 22:05:23,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:23,541 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-25 22:05:23,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-25 22:05:23,541 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-25 22:05:23,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-25 22:05:23,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:23,543 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:23,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-25 22:05:23,756 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:23,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:23,757 INFO L82 PathProgramCache]: Analyzing trace with hash -616519604, now seen corresponding path program 6 times [2020-10-25 22:05:23,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:23,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127764357] [2020-10-25 22:05:23,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:23,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127764357] [2020-10-25 22:05:23,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864607407] [2020-10-25 22:05:23,881 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 [2020-10-25 22:05:24,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-25 22:05:24,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:05:24,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-25 22:05:24,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:24,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:24,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-25 22:05:24,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486748092] [2020-10-25 22:05:24,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-25 22:05:24,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:24,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-25 22:05:24,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-25 22:05:24,990 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-10-25 22:05:25,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:25,042 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-25 22:05:25,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-25 22:05:25,044 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-25 22:05:25,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:25,044 INFO L225 Difference]: With dead ends: 36 [2020-10-25 22:05:25,044 INFO L226 Difference]: Without dead ends: 27 [2020-10-25 22:05:25,045 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 [2020-10-25 22:05:25,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-25 22:05:25,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-25 22:05:25,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-25 22:05:25,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-25 22:05:25,049 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2020-10-25 22:05:25,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:25,050 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-25 22:05:25,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-25 22:05:25,050 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-25 22:05:25,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-25 22:05:25,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:25,051 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:25,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:25,263 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:25,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:25,264 INFO L82 PathProgramCache]: Analyzing trace with hash 4509962, now seen corresponding path program 7 times [2020-10-25 22:05:25,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:25,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804385661] [2020-10-25 22:05:25,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:25,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804385661] [2020-10-25 22:05:25,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959285045] [2020-10-25 22:05:25,408 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 [2020-10-25 22:05:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:25,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-25 22:05:25,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:25,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:25,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-25 22:05:25,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867996472] [2020-10-25 22:05:25,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-25 22:05:25,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:25,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-25 22:05:25,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-25 22:05:25,535 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2020-10-25 22:05:25,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:25,591 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-25 22:05:25,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-25 22:05:25,592 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-25 22:05:25,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:25,593 INFO L225 Difference]: With dead ends: 38 [2020-10-25 22:05:25,593 INFO L226 Difference]: Without dead ends: 29 [2020-10-25 22:05:25,594 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 [2020-10-25 22:05:25,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-25 22:05:25,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-25 22:05:25,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-25 22:05:25,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-25 22:05:25,599 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-10-25 22:05:25,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:25,599 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-25 22:05:25,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-25 22:05:25,599 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-25 22:05:25,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-25 22:05:25,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:25,600 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:25,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:25,812 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:25,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:25,813 INFO L82 PathProgramCache]: Analyzing trace with hash -186531256, now seen corresponding path program 8 times [2020-10-25 22:05:25,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:25,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290098524] [2020-10-25 22:05:25,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:25,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290098524] [2020-10-25 22:05:25,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137896057] [2020-10-25 22:05:25,932 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 [2020-10-25 22:05:26,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 22:05:26,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:05:26,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-25 22:05:26,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:26,095 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:26,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:26,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-25 22:05:26,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837144347] [2020-10-25 22:05:26,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-25 22:05:26,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:26,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-25 22:05:26,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-25 22:05:26,099 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2020-10-25 22:05:26,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:26,170 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-25 22:05:26,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-25 22:05:26,172 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-25 22:05:26,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:26,172 INFO L225 Difference]: With dead ends: 40 [2020-10-25 22:05:26,173 INFO L226 Difference]: Without dead ends: 31 [2020-10-25 22:05:26,173 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 [2020-10-25 22:05:26,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-25 22:05:26,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-25 22:05:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-25 22:05:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-25 22:05:26,178 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-10-25 22:05:26,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:26,179 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-25 22:05:26,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-25 22:05:26,179 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-25 22:05:26,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-25 22:05:26,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:26,180 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:26,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-25 22:05:26,392 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:26,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:26,393 INFO L82 PathProgramCache]: Analyzing trace with hash 906451974, now seen corresponding path program 9 times [2020-10-25 22:05:26,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:26,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968024599] [2020-10-25 22:05:26,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:26,518 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:26,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968024599] [2020-10-25 22:05:26,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188569746] [2020-10-25 22:05:26,519 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 [2020-10-25 22:05:33,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-25 22:05:33,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:05:33,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-25 22:05:33,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:33,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:33,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-25 22:05:33,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149851049] [2020-10-25 22:05:33,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-25 22:05:33,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:33,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-25 22:05:33,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-25 22:05:33,308 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2020-10-25 22:05:33,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:33,390 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-25 22:05:33,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-25 22:05:33,393 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-25 22:05:33,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:33,393 INFO L225 Difference]: With dead ends: 41 [2020-10-25 22:05:33,393 INFO L226 Difference]: Without dead ends: 32 [2020-10-25 22:05:33,394 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 [2020-10-25 22:05:33,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-25 22:05:33,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-25 22:05:33,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-25 22:05:33,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-25 22:05:33,401 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2020-10-25 22:05:33,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:33,403 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-25 22:05:33,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-25 22:05:33,404 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-25 22:05:33,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-25 22:05:33,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:33,404 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:33,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:33,606 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:33,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:33,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1003651516, now seen corresponding path program 10 times [2020-10-25 22:05:33,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:33,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866776237] [2020-10-25 22:05:33,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:05:33,892 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:05:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:05:34,113 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:05:34,173 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 22:05:34,174 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 22:05:34,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-25 22:05:34,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:05:34 BoogieIcfgContainer [2020-10-25 22:05:34,265 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:05:34,266 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:05:34,266 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:05:34,266 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:05:34,267 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:05:20" (3/4) ... [2020-10-25 22:05:34,270 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 22:05:34,376 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 22:05:34,377 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:05:34,379 INFO L168 Benchmark]: Toolchain (without parser) took 15233.59 ms. Allocated memory was 50.3 MB in the beginning and 88.1 MB in the end (delta: 37.7 MB). Free memory was 26.9 MB in the beginning and 27.0 MB in the end (delta: -111.3 kB). Peak memory consumption was 39.4 MB. Max. memory is 16.1 GB. [2020-10-25 22:05:34,379 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 39.8 MB. Free memory was 26.1 MB in the beginning and 26.0 MB in the end (delta: 22.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:05:34,380 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.00 ms. Allocated memory is still 50.3 MB. Free memory was 26.3 MB in the beginning and 29.5 MB in the end (delta: -3.2 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2020-10-25 22:05:34,381 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.04 ms. Allocated memory is still 50.3 MB. Free memory was 29.5 MB in the beginning and 27.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:05:34,381 INFO L168 Benchmark]: Boogie Preprocessor took 48.39 ms. Allocated memory is still 50.3 MB. Free memory was 27.7 MB in the beginning and 26.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:05:34,381 INFO L168 Benchmark]: RCFGBuilder took 516.68 ms. Allocated memory is still 50.3 MB. Free memory was 26.2 MB in the beginning and 33.5 MB in the end (delta: -7.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 16.1 GB. [2020-10-25 22:05:34,382 INFO L168 Benchmark]: TraceAbstraction took 14181.79 ms. Allocated memory was 50.3 MB in the beginning and 88.1 MB in the end (delta: 37.7 MB). Free memory was 33.2 MB in the beginning and 30.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 48.6 MB. Max. memory is 16.1 GB. [2020-10-25 22:05:34,383 INFO L168 Benchmark]: Witness Printer took 111.09 ms. Allocated memory is still 88.1 MB. Free memory was 30.4 MB in the beginning and 27.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:05:34,385 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 39.8 MB. Free memory was 26.1 MB in the beginning and 26.0 MB in the end (delta: 22.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 306.00 ms. Allocated memory is still 50.3 MB. Free memory was 26.3 MB in the beginning and 29.5 MB in the end (delta: -3.2 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.04 ms. Allocated memory is still 50.3 MB. Free memory was 29.5 MB in the beginning and 27.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.39 ms. Allocated memory is still 50.3 MB. Free memory was 27.7 MB in the beginning and 26.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 516.68 ms. Allocated memory is still 50.3 MB. Free memory was 26.2 MB in the beginning and 33.5 MB in the end (delta: -7.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14181.79 ms. Allocated memory was 50.3 MB in the beginning and 88.1 MB in the end (delta: 37.7 MB). Free memory was 33.2 MB in the beginning and 30.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 48.6 MB. Max. memory is 16.1 GB. * Witness Printer took 111.09 ms. Allocated memory is still 88.1 MB. Free memory was 30.4 MB in the beginning and 27.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 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: 14.0s, OverallIterations: 12, TraceHistogramMax: 10, AutomataDifference: 0.6s, 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, 0.5s 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: 0.2s SsaConstructionTime, 9.0s SatisfiabilityAnalysisTime, 1.2s 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...