./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/list-ext3-properties/sll_nondet_insert-1.i -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 9ee3fbac20f2e3901a6c722d8c87f09ca9b3135c ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.1-dev-20ed64e [2021-08-26 02:59:59,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 02:59:59,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 03:00:00,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 03:00:00,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 03:00:00,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 03:00:00,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 03:00:00,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 03:00:00,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 03:00:00,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 03:00:00,028 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 03:00:00,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 03:00:00,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 03:00:00,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 03:00:00,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 03:00:00,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 03:00:00,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 03:00:00,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 03:00:00,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 03:00:00,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 03:00:00,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 03:00:00,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 03:00:00,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 03:00:00,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 03:00:00,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 03:00:00,066 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 03:00:00,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 03:00:00,068 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 03:00:00,069 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 03:00:00,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 03:00:00,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 03:00:00,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 03:00:00,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 03:00:00,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 03:00:00,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 03:00:00,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 03:00:00,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 03:00:00,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 03:00:00,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 03:00:00,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 03:00:00,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 03:00:00,077 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 03:00:00,109 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 03:00:00,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 03:00:00,111 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 03:00:00,112 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 03:00:00,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 03:00:00,114 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 03:00:00,114 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 03:00:00,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 03:00:00,114 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 03:00:00,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 03:00:00,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 03:00:00,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 03:00:00,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 03:00:00,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 03:00:00,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 03:00:00,116 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 03:00:00,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 03:00:00,116 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 03:00:00,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 03:00:00,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 03:00:00,117 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 03:00:00,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 03:00:00,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:00:00,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 03:00:00,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 03:00:00,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 03:00:00,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 03:00:00,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 03:00:00,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 03:00:00,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 03:00:00,119 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ee3fbac20f2e3901a6c722d8c87f09ca9b3135c [2021-08-26 03:00:00,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 03:00:00,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 03:00:00,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 03:00:00,453 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 03:00:00,453 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 03:00:00,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2021-08-26 03:00:00,512 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff1bd1066/87b2ab05e6c34f99a0c1e0c92c0437d4/FLAG9846b429a [2021-08-26 03:00:01,022 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 03:00:01,023 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2021-08-26 03:00:01,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff1bd1066/87b2ab05e6c34f99a0c1e0c92c0437d4/FLAG9846b429a [2021-08-26 03:00:01,525 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff1bd1066/87b2ab05e6c34f99a0c1e0c92c0437d4 [2021-08-26 03:00:01,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 03:00:01,528 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 03:00:01,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 03:00:01,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 03:00:01,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 03:00:01,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:00:01" (1/1) ... [2021-08-26 03:00:01,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c98cbe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:01, skipping insertion in model container [2021-08-26 03:00:01,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:00:01" (1/1) ... [2021-08-26 03:00:01,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 03:00:01,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 03:00:01,864 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2021-08-26 03:00:01,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:00:01,873 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 03:00:01,906 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2021-08-26 03:00:01,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:00:01,931 INFO L208 MainTranslator]: Completed translation [2021-08-26 03:00:01,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:01 WrapperNode [2021-08-26 03:00:01,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 03:00:01,933 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 03:00:01,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 03:00:01,933 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 03:00:01,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:01" (1/1) ... [2021-08-26 03:00:01,951 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:01" (1/1) ... [2021-08-26 03:00:01,973 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 03:00:01,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 03:00:01,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 03:00:01,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 03:00:01,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:01" (1/1) ... [2021-08-26 03:00:01,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:01" (1/1) ... [2021-08-26 03:00:01,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:01" (1/1) ... [2021-08-26 03:00:01,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:01" (1/1) ... [2021-08-26 03:00:01,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:01" (1/1) ... [2021-08-26 03:00:01,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:01" (1/1) ... [2021-08-26 03:00:01,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:01" (1/1) ... [2021-08-26 03:00:02,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 03:00:02,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 03:00:02,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 03:00:02,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 03:00:02,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:01" (1/1) ... [2021-08-26 03:00:02,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:00:02,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:00:02,030 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 03:00:02,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 03:00:02,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-26 03:00:02,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-26 03:00:02,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 03:00:02,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-26 03:00:02,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 03:00:02,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-08-26 03:00:02,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 03:00:02,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 03:00:02,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 03:00:02,575 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 03:00:02,575 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-08-26 03:00:02,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:00:02 BoogieIcfgContainer [2021-08-26 03:00:02,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 03:00:02,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 03:00:02,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 03:00:02,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 03:00:02,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:00:01" (1/3) ... [2021-08-26 03:00:02,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d5b54e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:00:02, skipping insertion in model container [2021-08-26 03:00:02,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:00:01" (2/3) ... [2021-08-26 03:00:02,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d5b54e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:00:02, skipping insertion in model container [2021-08-26 03:00:02,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:00:02" (3/3) ... [2021-08-26 03:00:02,587 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-1.i [2021-08-26 03:00:02,592 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 03:00:02,592 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 03:00:02,638 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 03:00:02,644 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 03:00:02,645 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 03:00:02,658 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 46 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:02,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 03:00:02,663 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:00:02,664 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:00:02,665 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:00:02,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:00:02,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1240059524, now seen corresponding path program 1 times [2021-08-26 03:00:02,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:00:02,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222105456] [2021-08-26 03:00:02,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:00:02,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:00:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:00:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:00:02,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:00:02,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222105456] [2021-08-26 03:00:02,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222105456] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:00:02,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:00:02,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 03:00:02,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442611888] [2021-08-26 03:00:02,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 03:00:02,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:00:02,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 03:00:02,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 03:00:02,849 INFO L87 Difference]: Start difference. First operand has 47 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 46 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:02,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:00:02,871 INFO L93 Difference]: Finished difference Result 89 states and 132 transitions. [2021-08-26 03:00:02,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 03:00:02,872 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-26 03:00:02,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:00:02,880 INFO L225 Difference]: With dead ends: 89 [2021-08-26 03:00:02,880 INFO L226 Difference]: Without dead ends: 40 [2021-08-26 03:00:02,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 03:00:02,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-26 03:00:02,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-08-26 03:00:02,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:02,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-08-26 03:00:02,917 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 18 [2021-08-26 03:00:02,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:00:02,918 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-08-26 03:00:02,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:02,918 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-08-26 03:00:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 03:00:02,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:00:02,920 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:00:02,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 03:00:02,921 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:00:02,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:00:02,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1466688541, now seen corresponding path program 1 times [2021-08-26 03:00:02,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:00:02,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745254930] [2021-08-26 03:00:02,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:00:02,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:00:02,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:00:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:00:03,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:00:03,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745254930] [2021-08-26 03:00:03,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745254930] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:00:03,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:00:03,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-26 03:00:03,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58382088] [2021-08-26 03:00:03,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 03:00:03,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:00:03,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 03:00:03,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:00:03,082 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:03,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:00:03,223 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2021-08-26 03:00:03,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 03:00:03,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-26 03:00:03,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:00:03,226 INFO L225 Difference]: With dead ends: 82 [2021-08-26 03:00:03,226 INFO L226 Difference]: Without dead ends: 53 [2021-08-26 03:00:03,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-26 03:00:03,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-26 03:00:03,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-08-26 03:00:03,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:03,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2021-08-26 03:00:03,246 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 25 [2021-08-26 03:00:03,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:00:03,247 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2021-08-26 03:00:03,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:03,247 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2021-08-26 03:00:03,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 03:00:03,247 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:00:03,247 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:00:03,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 03:00:03,248 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:00:03,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:00:03,248 INFO L82 PathProgramCache]: Analyzing trace with hash -395195180, now seen corresponding path program 1 times [2021-08-26 03:00:03,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:00:03,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677028543] [2021-08-26 03:00:03,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:00:03,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:00:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:00:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:00:03,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:00:03,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677028543] [2021-08-26 03:00:03,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677028543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:00:03,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670473131] [2021-08-26 03:00:03,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:00:03,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:00:03,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:00:03,381 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:00:03,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 03:00:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:00:03,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 03:00:03,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:00:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:00:03,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670473131] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:00:03,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 03:00:03,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-08-26 03:00:03,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558731156] [2021-08-26 03:00:03,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 03:00:03,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:00:03,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 03:00:03,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:00:03,764 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:03,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:00:03,910 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2021-08-26 03:00:03,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 03:00:03,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-26 03:00:03,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:00:03,913 INFO L225 Difference]: With dead ends: 84 [2021-08-26 03:00:03,913 INFO L226 Difference]: Without dead ends: 55 [2021-08-26 03:00:03,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-26 03:00:03,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-26 03:00:03,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2021-08-26 03:00:03,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:03,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2021-08-26 03:00:03,929 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 28 [2021-08-26 03:00:03,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:00:03,929 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2021-08-26 03:00:03,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:03,931 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2021-08-26 03:00:03,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-26 03:00:03,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:00:03,932 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:00:03,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 03:00:04,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:00:04,145 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:00:04,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:00:04,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1510946244, now seen corresponding path program 1 times [2021-08-26 03:00:04,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:00:04,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778090379] [2021-08-26 03:00:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:00:04,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:00:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:00:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:00:04,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:00:04,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778090379] [2021-08-26 03:00:04,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778090379] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:00:04,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:00:04,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-26 03:00:04,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132489003] [2021-08-26 03:00:04,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 03:00:04,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:00:04,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 03:00:04,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-26 03:00:04,246 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:04,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:00:04,343 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2021-08-26 03:00:04,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 03:00:04,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-26 03:00:04,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:00:04,345 INFO L225 Difference]: With dead ends: 70 [2021-08-26 03:00:04,345 INFO L226 Difference]: Without dead ends: 65 [2021-08-26 03:00:04,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-26 03:00:04,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-26 03:00:04,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 47. [2021-08-26 03:00:04,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:04,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2021-08-26 03:00:04,351 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 29 [2021-08-26 03:00:04,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:00:04,351 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2021-08-26 03:00:04,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:04,351 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2021-08-26 03:00:04,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-26 03:00:04,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:00:04,352 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:00:04,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-26 03:00:04,353 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:00:04,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:00:04,353 INFO L82 PathProgramCache]: Analyzing trace with hash -353652332, now seen corresponding path program 1 times [2021-08-26 03:00:04,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:00:04,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302608973] [2021-08-26 03:00:04,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:00:04,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:00:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:00:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:00:04,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:00:04,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302608973] [2021-08-26 03:00:04,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302608973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:00:04,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377038356] [2021-08-26 03:00:04,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:00:04,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:00:04,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:00:04,477 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:00:04,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 03:00:04,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:00:04,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 03:00:04,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:00:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:00:04,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377038356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:00:04,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:00:04,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-26 03:00:04,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669348348] [2021-08-26 03:00:04,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 03:00:04,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:00:04,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 03:00:04,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-26 03:00:04,727 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:04,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:00:04,899 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2021-08-26 03:00:04,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 03:00:04,900 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-26 03:00:04,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:00:04,902 INFO L225 Difference]: With dead ends: 102 [2021-08-26 03:00:04,902 INFO L226 Difference]: Without dead ends: 68 [2021-08-26 03:00:04,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-08-26 03:00:04,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-26 03:00:04,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2021-08-26 03:00:04,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:04,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-08-26 03:00:04,914 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 30 [2021-08-26 03:00:04,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:00:04,914 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-08-26 03:00:04,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:04,915 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-08-26 03:00:04,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 03:00:04,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:00:04,918 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:00:04,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 03:00:05,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:00:05,129 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:00:05,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:00:05,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1806454861, now seen corresponding path program 2 times [2021-08-26 03:00:05,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:00:05,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503917026] [2021-08-26 03:00:05,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:00:05,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:00:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:00:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:00:05,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:00:05,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503917026] [2021-08-26 03:00:05,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503917026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:00:05,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127071317] [2021-08-26 03:00:05,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:00:05,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:00:05,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:00:05,227 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:00:05,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 03:00:05,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:00:05,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:00:05,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-26 03:00:05,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:00:05,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-26 03:00:05,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-08-26 03:00:05,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 03:00:05,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-08-26 03:00:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:00:05,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127071317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:00:05,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:00:05,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-08-26 03:00:05,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991212719] [2021-08-26 03:00:05,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 03:00:05,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:00:05,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 03:00:05,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-08-26 03:00:05,728 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:06,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:00:06,002 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2021-08-26 03:00:06,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 03:00:06,003 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-26 03:00:06,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:00:06,004 INFO L225 Difference]: With dead ends: 75 [2021-08-26 03:00:06,004 INFO L226 Difference]: Without dead ends: 70 [2021-08-26 03:00:06,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-08-26 03:00:06,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-26 03:00:06,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2021-08-26 03:00:06,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:06,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2021-08-26 03:00:06,025 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 34 [2021-08-26 03:00:06,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:00:06,026 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2021-08-26 03:00:06,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:06,027 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2021-08-26 03:00:06,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-26 03:00:06,030 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:00:06,031 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:00:06,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 03:00:06,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:00:06,245 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:00:06,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:00:06,245 INFO L82 PathProgramCache]: Analyzing trace with hash 217180203, now seen corresponding path program 3 times [2021-08-26 03:00:06,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:00:06,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485175968] [2021-08-26 03:00:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:00:06,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:00:06,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:00:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-26 03:00:06,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:00:06,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485175968] [2021-08-26 03:00:06,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485175968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:00:06,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585702475] [2021-08-26 03:00:06,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:00:06,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:00:06,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:00:06,513 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:00:06,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 03:00:06,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 03:00:06,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:00:06,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-26 03:00:06,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:00:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-26 03:00:06,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585702475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:00:06,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:00:06,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-26 03:00:06,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362688898] [2021-08-26 03:00:06,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 03:00:06,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:00:06,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 03:00:06,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-26 03:00:06,939 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:07,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:00:07,327 INFO L93 Difference]: Finished difference Result 213 states and 262 transitions. [2021-08-26 03:00:07,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-26 03:00:07,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-26 03:00:07,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:00:07,329 INFO L225 Difference]: With dead ends: 213 [2021-08-26 03:00:07,329 INFO L226 Difference]: Without dead ends: 205 [2021-08-26 03:00:07,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 306.0ms TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-08-26 03:00:07,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-26 03:00:07,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 97. [2021-08-26 03:00:07,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.3020833333333333) internal successors, (125), 96 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:07,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2021-08-26 03:00:07,350 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 35 [2021-08-26 03:00:07,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:00:07,351 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2021-08-26 03:00:07,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:07,351 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2021-08-26 03:00:07,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-26 03:00:07,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:00:07,352 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:00:07,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 03:00:07,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:00:07,576 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:00:07,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:00:07,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1805693939, now seen corresponding path program 4 times [2021-08-26 03:00:07,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:00:07,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983283895] [2021-08-26 03:00:07,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:00:07,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:00:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:00:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:00:07,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:00:07,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983283895] [2021-08-26 03:00:07,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983283895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:00:07,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573830276] [2021-08-26 03:00:07,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:00:07,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:00:07,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:00:07,809 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:00:07,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 03:00:07,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:00:07,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:00:07,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-26 03:00:07,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:00:08,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-26 03:00:08,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 03:00:08,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-26 03:00:08,146 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-26 03:00:08,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-08-26 03:00:08,230 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-26 03:00:08,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-08-26 03:00:08,241 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-08-26 03:00:08,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-08-26 03:00:08,775 INFO L354 Elim1Store]: treesize reduction 97, result has 24.8 percent of original size [2021-08-26 03:00:08,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 98 [2021-08-26 03:00:08,814 INFO L354 Elim1Store]: treesize reduction 102, result has 6.4 percent of original size [2021-08-26 03:00:08,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 53 [2021-08-26 03:00:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:00:08,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573830276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:00:08,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:00:08,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-26 03:00:08,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943417626] [2021-08-26 03:00:08,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-26 03:00:08,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:00:08,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-26 03:00:08,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-08-26 03:00:08,836 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:09,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:00:09,271 INFO L93 Difference]: Finished difference Result 168 states and 212 transitions. [2021-08-26 03:00:09,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 03:00:09,271 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-26 03:00:09,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:00:09,273 INFO L225 Difference]: With dead ends: 168 [2021-08-26 03:00:09,273 INFO L226 Difference]: Without dead ends: 158 [2021-08-26 03:00:09,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 503.1ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-08-26 03:00:09,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-26 03:00:09,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 129. [2021-08-26 03:00:09,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.296875) internal successors, (166), 128 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:09,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 166 transitions. [2021-08-26 03:00:09,287 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 166 transitions. Word has length 36 [2021-08-26 03:00:09,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:00:09,287 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 166 transitions. [2021-08-26 03:00:09,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:09,287 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 166 transitions. [2021-08-26 03:00:09,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-26 03:00:09,292 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:00:09,292 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:00:09,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 03:00:09,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:00:09,515 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:00:09,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:00:09,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1169066102, now seen corresponding path program 1 times [2021-08-26 03:00:09,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:00:09,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554313047] [2021-08-26 03:00:09,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:00:09,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:00:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:00:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-26 03:00:09,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:00:09,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554313047] [2021-08-26 03:00:09,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554313047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:00:09,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339666869] [2021-08-26 03:00:09,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:00:09,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:00:09,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:00:09,616 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:00:09,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 03:00:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:00:09,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 03:00:09,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:00:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-26 03:00:10,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339666869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:00:10,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:00:10,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-26 03:00:10,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655317907] [2021-08-26 03:00:10,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 03:00:10,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:00:10,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 03:00:10,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-26 03:00:10,020 INFO L87 Difference]: Start difference. First operand 129 states and 166 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:10,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:00:10,363 INFO L93 Difference]: Finished difference Result 375 states and 494 transitions. [2021-08-26 03:00:10,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-26 03:00:10,364 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-26 03:00:10,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:00:10,366 INFO L225 Difference]: With dead ends: 375 [2021-08-26 03:00:10,366 INFO L226 Difference]: Without dead ends: 289 [2021-08-26 03:00:10,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 211.6ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-08-26 03:00:10,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-08-26 03:00:10,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 141. [2021-08-26 03:00:10,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.2714285714285714) internal successors, (178), 140 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:10,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 178 transitions. [2021-08-26 03:00:10,382 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 178 transitions. Word has length 38 [2021-08-26 03:00:10,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:00:10,382 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 178 transitions. [2021-08-26 03:00:10,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:10,383 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 178 transitions. [2021-08-26 03:00:10,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-26 03:00:10,383 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:00:10,383 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:00:10,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 03:00:10,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:00:10,604 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:00:10,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:00:10,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1846037516, now seen corresponding path program 1 times [2021-08-26 03:00:10,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:00:10,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485903819] [2021-08-26 03:00:10,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:00:10,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:00:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:00:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-26 03:00:10,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:00:10,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485903819] [2021-08-26 03:00:10,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485903819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:00:10,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828821437] [2021-08-26 03:00:10,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:00:10,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:00:10,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:00:10,678 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:00:10,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 03:00:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:00:10,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 03:00:10,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:00:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-26 03:00:11,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828821437] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:00:11,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 03:00:11,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-08-26 03:00:11,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360602211] [2021-08-26 03:00:11,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 03:00:11,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:00:11,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 03:00:11,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-26 03:00:11,066 INFO L87 Difference]: Start difference. First operand 141 states and 178 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:11,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:00:11,227 INFO L93 Difference]: Finished difference Result 273 states and 348 transitions. [2021-08-26 03:00:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 03:00:11,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-26 03:00:11,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:00:11,229 INFO L225 Difference]: With dead ends: 273 [2021-08-26 03:00:11,229 INFO L226 Difference]: Without dead ends: 241 [2021-08-26 03:00:11,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-26 03:00:11,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-08-26 03:00:11,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 157. [2021-08-26 03:00:11,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.2692307692307692) internal successors, (198), 156 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:11,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 198 transitions. [2021-08-26 03:00:11,244 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 198 transitions. Word has length 38 [2021-08-26 03:00:11,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:00:11,244 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 198 transitions. [2021-08-26 03:00:11,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:00:11,245 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 198 transitions. [2021-08-26 03:00:11,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-26 03:00:11,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:00:11,245 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:00:11,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-26 03:00:11,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:00:11,468 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:00:11,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:00:11,468 INFO L82 PathProgramCache]: Analyzing trace with hash -2055902770, now seen corresponding path program 1 times [2021-08-26 03:00:11,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:00:11,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158875755] [2021-08-26 03:00:11,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:00:11,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:00:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 03:00:11,486 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 03:00:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 03:00:11,517 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 03:00:11,517 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 03:00:11,518 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:00:11,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-26 03:00:11,524 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 03:00:11,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:00:11 BoogieIcfgContainer [2021-08-26 03:00:11,559 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 03:00:11,560 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 03:00:11,560 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 03:00:11,560 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 03:00:11,560 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:00:02" (3/4) ... [2021-08-26 03:00:11,562 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 03:00:11,601 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 03:00:11,602 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 03:00:11,603 INFO L168 Benchmark]: Toolchain (without parser) took 10074.57 ms. Allocated memory was 56.6 MB in the beginning and 176.2 MB in the end (delta: 119.5 MB). Free memory was 34.1 MB in the beginning and 81.2 MB in the end (delta: -47.1 MB). Peak memory consumption was 72.4 MB. Max. memory is 16.1 GB. [2021-08-26 03:00:11,605 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 56.6 MB. Free memory was 38.9 MB in the beginning and 38.9 MB in the end (delta: 44.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:00:11,605 INFO L168 Benchmark]: CACSL2BoogieTranslator took 400.35 ms. Allocated memory is still 56.6 MB. Free memory was 33.9 MB in the beginning and 33.1 MB in the end (delta: 848.9 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 03:00:11,606 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.90 ms. Allocated memory is still 56.6 MB. Free memory was 33.1 MB in the beginning and 30.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:00:11,606 INFO L168 Benchmark]: Boogie Preprocessor took 28.02 ms. Allocated memory is still 56.6 MB. Free memory was 30.7 MB in the beginning and 29.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:00:11,606 INFO L168 Benchmark]: RCFGBuilder took 574.82 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 28.9 MB in the beginning and 46.6 MB in the end (delta: -17.7 MB). Peak memory consumption was 15.5 MB. Max. memory is 16.1 GB. [2021-08-26 03:00:11,607 INFO L168 Benchmark]: TraceAbstraction took 8977.86 ms. Allocated memory was 69.2 MB in the beginning and 176.2 MB in the end (delta: 107.0 MB). Free memory was 45.8 MB in the beginning and 85.4 MB in the end (delta: -39.6 MB). Peak memory consumption was 65.9 MB. Max. memory is 16.1 GB. [2021-08-26 03:00:11,607 INFO L168 Benchmark]: Witness Printer took 42.07 ms. Allocated memory is still 176.2 MB. Free memory was 85.4 MB in the beginning and 81.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 03:00:11,608 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 56.6 MB. Free memory was 38.9 MB in the beginning and 38.9 MB in the end (delta: 44.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 400.35 ms. Allocated memory is still 56.6 MB. Free memory was 33.9 MB in the beginning and 33.1 MB in the end (delta: 848.9 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.90 ms. Allocated memory is still 56.6 MB. Free memory was 33.1 MB in the beginning and 30.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.02 ms. Allocated memory is still 56.6 MB. Free memory was 30.7 MB in the beginning and 29.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 574.82 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 28.9 MB in the beginning and 46.6 MB in the end (delta: -17.7 MB). Peak memory consumption was 15.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8977.86 ms. Allocated memory was 69.2 MB in the beginning and 176.2 MB in the end (delta: 107.0 MB). Free memory was 45.8 MB in the beginning and 85.4 MB in the end (delta: -39.6 MB). Peak memory consumption was 65.9 MB. Max. memory is 16.1 GB. * Witness Printer took 42.07 ms. Allocated memory is still 176.2 MB. Free memory was 85.4 MB in the beginning and 81.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 641]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L620] int len = from; [L621] len < until && __VERIFIER_nondet_int() [L621] len < until && __VERIFIER_nondet_int() [L621] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L624] return len; [L627] const int len = _get_nondet_int(2, 5); [L628] SLL s = sll_create(len); [L575] SLL head = ((void *)0); [L576] EXPR len-- [L576] COND TRUE len-- > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L576] EXPR len-- [L576] COND TRUE len-- > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L576] EXPR len-- [L576] COND FALSE !(len-- > 0) [L584] return head; [L628] SLL s = sll_create(len); [L620] int len = from; [L621] len < until && __VERIFIER_nondet_int() [L621] len < until && __VERIFIER_nondet_int() [L621] COND TRUE len < until && __VERIFIER_nondet_int() [L622] len++ [L621] len < until && __VERIFIER_nondet_int() [L621] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L624] return len; [L629] const int k = _get_nondet_int(0, len - 1); [L630] int i = 0; [L631] i < k && __VERIFIER_nondet_int() [L631] i < k && __VERIFIER_nondet_int() [L631] COND FALSE !(i < k && __VERIFIER_nondet_int()) [L636] EXPR \read(s) [L587] int len = 0; [L588] COND TRUE \read(head) [L589] len++ [L590] EXPR head->next [L590] head = head->next [L588] COND TRUE \read(head) [L589] len++ [L590] EXPR head->next [L590] head = head->next [L588] COND FALSE !(\read(head)) [L592] return len; [L636] COND TRUE k + len != sll_length(s) [L641] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8886.2ms, OverallIterations: 11, TraceHistogramMax: 3, EmptinessCheckTime: 25.1ms, AutomataDifference: 2242.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 504 SDtfs, 1414 SDslu, 2601 SDs, 0 SdLazy, 1247 SolverSat, 164 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 801.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 379 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1762.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=157occurred in iteration=10, InterpolantAutomatonStates: 110, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 147.7ms AutomataMinimizationTime, 10 MinimizatonAttempts, 441 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 148.4ms SsaConstructionTime, 361.6ms SatisfiabilityAnalysisTime, 3362.8ms InterpolantComputationTime, 588 NumberOfCodeBlocks, 584 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 533 ConstructedInterpolants, 3 QuantifiedInterpolants, 3605 SizeOfPredicates, 72 NumberOfNonLiveVariables, 1211 ConjunctsInSsa, 160 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 87/138 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! [2021-08-26 03:00:11,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...