./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de51.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/loops-crafted-1/in-de51.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6b650e50691cb35e1bdf008faa87d25716bf83c58902e8bffb444ab81952ff19 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:22:12,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:22:12,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:22:12,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:22:12,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:22:12,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:22:12,995 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:22:12,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:22:12,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:22:13,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:22:13,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:22:13,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:22:13,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:22:13,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:22:13,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:22:13,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:22:13,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:22:13,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:22:13,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:22:13,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:22:13,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:22:13,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:22:13,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:22:13,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:22:13,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:22:13,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:22:13,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:22:13,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:22:13,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:22:13,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:22:13,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:22:13,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:22:13,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:22:13,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:22:13,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:22:13,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:22:13,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:22:13,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:22:13,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:22:13,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:22:13,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:22:13,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:22:13,059 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:22:13,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:22:13,059 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:22:13,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:22:13,060 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:22:13,060 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:22:13,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:22:13,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:22:13,061 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:22:13,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:22:13,062 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:22:13,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:22:13,062 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:22:13,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:22:13,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:22:13,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:22:13,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:22:13,063 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:22:13,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:22:13,063 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:22:13,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:22:13,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:22:13,064 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:22:13,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:22:13,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:22:13,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:22:13,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:22:13,065 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:22:13,065 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:22:13,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:22:13,066 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:22:13,066 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:22:13,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:22:13,066 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:22:13,066 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b650e50691cb35e1bdf008faa87d25716bf83c58902e8bffb444ab81952ff19 [2021-12-21 12:22:13,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:22:13,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:22:13,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:22:13,262 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:22:13,263 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:22:13,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de51.c [2021-12-21 12:22:13,327 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d00f1d9ad/9261084825734b1f8948a036a84012ca/FLAG09309d4d8 [2021-12-21 12:22:13,616 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:22:13,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de51.c [2021-12-21 12:22:13,620 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d00f1d9ad/9261084825734b1f8948a036a84012ca/FLAG09309d4d8 [2021-12-21 12:22:14,058 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d00f1d9ad/9261084825734b1f8948a036a84012ca [2021-12-21 12:22:14,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:22:14,064 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:22:14,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:22:14,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:22:14,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:22:14,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:22:14" (1/1) ... [2021-12-21 12:22:14,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b54b7c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:22:14, skipping insertion in model container [2021-12-21 12:22:14,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:22:14" (1/1) ... [2021-12-21 12:22:14,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:22:14,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:22:14,236 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de51.c[368,381] [2021-12-21 12:22:14,250 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:22:14,257 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:22:14,266 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de51.c[368,381] [2021-12-21 12:22:14,271 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:22:14,279 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:22:14,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:22:14 WrapperNode [2021-12-21 12:22:14,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:22:14,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:22:14,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:22:14,281 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:22:14,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:22:14" (1/1) ... [2021-12-21 12:22:14,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:22:14" (1/1) ... [2021-12-21 12:22:14,309 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2021-12-21 12:22:14,309 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:22:14,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:22:14,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:22:14,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:22:14,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:22:14" (1/1) ... [2021-12-21 12:22:14,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:22:14" (1/1) ... [2021-12-21 12:22:14,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:22:14" (1/1) ... [2021-12-21 12:22:14,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:22:14" (1/1) ... [2021-12-21 12:22:14,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:22:14" (1/1) ... [2021-12-21 12:22:14,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:22:14" (1/1) ... [2021-12-21 12:22:14,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:22:14" (1/1) ... [2021-12-21 12:22:14,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:22:14,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:22:14,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:22:14,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:22:14,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:22:14" (1/1) ... [2021-12-21 12:22:14,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:22:14,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:22:14,360 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) [2021-12-21 12:22:14,365 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 [2021-12-21 12:22:14,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:22:14,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:22:14,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:22:14,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:22:14,425 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:22:14,426 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:22:14,505 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:22:14,509 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:22:14,509 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-21 12:22:14,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:22:14 BoogieIcfgContainer [2021-12-21 12:22:14,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:22:14,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:22:14,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:22:14,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:22:14,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:22:14" (1/3) ... [2021-12-21 12:22:14,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7607ec21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:22:14, skipping insertion in model container [2021-12-21 12:22:14,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:22:14" (2/3) ... [2021-12-21 12:22:14,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7607ec21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:22:14, skipping insertion in model container [2021-12-21 12:22:14,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:22:14" (3/3) ... [2021-12-21 12:22:14,515 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de51.c [2021-12-21 12:22:14,518 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:22:14,518 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:22:14,546 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:22:14,550 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, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-12-21 12:22:14,550 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:22:14,560 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 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) [2021-12-21 12:22:14,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 12:22:14,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:22:14,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:22:14,564 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:22:14,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:22:14,567 INFO L85 PathProgramCache]: Analyzing trace with hash 62220644, now seen corresponding path program 1 times [2021-12-21 12:22:14,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:22:14,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246629959] [2021-12-21 12:22:14,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:14,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:22:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:14,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:22:14,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:22:14,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246629959] [2021-12-21 12:22:14,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246629959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:22:14,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:22:14,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:22:14,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871479239] [2021-12-21 12:22:14,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:22:14,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:22:14,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:22:14,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:22:14,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:22:14,738 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-12-21 12:22:14,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:22:14,749 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2021-12-21 12:22:14,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:22:14,752 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2021-12-21 12:22:14,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:22:14,757 INFO L225 Difference]: With dead ends: 29 [2021-12-21 12:22:14,758 INFO L226 Difference]: Without dead ends: 12 [2021-12-21 12:22:14,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:22:14,764 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:22:14,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:22:14,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-21 12:22:14,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-21 12:22:14,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 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) [2021-12-21 12:22:14,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2021-12-21 12:22:14,783 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 11 [2021-12-21 12:22:14,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:22:14,784 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2021-12-21 12:22:14,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-12-21 12:22:14,784 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2021-12-21 12:22:14,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 12:22:14,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:22:14,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:22:14,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:22:14,785 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:22:14,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:22:14,788 INFO L85 PathProgramCache]: Analyzing trace with hash 58526560, now seen corresponding path program 1 times [2021-12-21 12:22:14,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:22:14,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720004529] [2021-12-21 12:22:14,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:14,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:22:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:22:14,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:22:14,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720004529] [2021-12-21 12:22:14,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720004529] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:22:14,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:22:14,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 12:22:14,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681913995] [2021-12-21 12:22:14,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:22:14,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:22:14,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:22:14,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:22:14,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 12:22:14,926 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-12-21 12:22:14,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:22:14,959 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2021-12-21 12:22:14,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 12:22:14,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2021-12-21 12:22:14,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:22:14,960 INFO L225 Difference]: With dead ends: 22 [2021-12-21 12:22:14,961 INFO L226 Difference]: Without dead ends: 18 [2021-12-21 12:22:14,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 12:22:14,962 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:22:14,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:22:14,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-21 12:22:14,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-21 12:22:14,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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) [2021-12-21 12:22:14,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2021-12-21 12:22:14,966 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 11 [2021-12-21 12:22:14,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:22:14,966 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2021-12-21 12:22:14,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-12-21 12:22:14,966 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2021-12-21 12:22:14,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 12:22:14,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:22:14,967 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:22:14,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 12:22:14,967 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:22:14,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:22:14,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1815988777, now seen corresponding path program 1 times [2021-12-21 12:22:14,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:22:14,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580906543] [2021-12-21 12:22:14,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:14,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:22:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:22:15,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:22:15,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580906543] [2021-12-21 12:22:15,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580906543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:22:15,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:22:15,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 12:22:15,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653651200] [2021-12-21 12:22:15,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:22:15,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 12:22:15,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:22:15,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 12:22:15,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:22:15,028 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-12-21 12:22:15,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:22:15,039 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2021-12-21 12:22:15,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 12:22:15,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2021-12-21 12:22:15,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:22:15,040 INFO L225 Difference]: With dead ends: 29 [2021-12-21 12:22:15,040 INFO L226 Difference]: Without dead ends: 23 [2021-12-21 12:22:15,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:22:15,041 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:22:15,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:22:15,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-21 12:22:15,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-21 12:22:15,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 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) [2021-12-21 12:22:15,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 34 transitions. [2021-12-21 12:22:15,048 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 34 transitions. Word has length 12 [2021-12-21 12:22:15,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:22:15,049 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 34 transitions. [2021-12-21 12:22:15,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-12-21 12:22:15,049 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 34 transitions. [2021-12-21 12:22:15,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 12:22:15,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:22:15,050 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:22:15,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 12:22:15,051 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:22:15,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:22:15,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1861241306, now seen corresponding path program 1 times [2021-12-21 12:22:15,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:22:15,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130150057] [2021-12-21 12:22:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:15,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:22:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:22:15,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:22:15,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130150057] [2021-12-21 12:22:15,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130150057] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:22:15,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:22:15,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 12:22:15,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602864762] [2021-12-21 12:22:15,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:22:15,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 12:22:15,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:22:15,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 12:22:15,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:22:15,086 INFO L87 Difference]: Start difference. First operand 23 states and 34 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-12-21 12:22:15,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:22:15,108 INFO L93 Difference]: Finished difference Result 41 states and 59 transitions. [2021-12-21 12:22:15,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 12:22:15,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2021-12-21 12:22:15,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:22:15,110 INFO L225 Difference]: With dead ends: 41 [2021-12-21 12:22:15,110 INFO L226 Difference]: Without dead ends: 32 [2021-12-21 12:22:15,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:22:15,111 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:22:15,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 19 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:22:15,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-21 12:22:15,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2021-12-21 12:22:15,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 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) [2021-12-21 12:22:15,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2021-12-21 12:22:15,116 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 12 [2021-12-21 12:22:15,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:22:15,117 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2021-12-21 12:22:15,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-12-21 12:22:15,117 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2021-12-21 12:22:15,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 12:22:15,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:22:15,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:22:15,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 12:22:15,118 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:22:15,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:22:15,119 INFO L85 PathProgramCache]: Analyzing trace with hash -492890182, now seen corresponding path program 1 times [2021-12-21 12:22:15,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:22:15,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88542862] [2021-12-21 12:22:15,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:15,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:22:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:22:15,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:22:15,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88542862] [2021-12-21 12:22:15,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88542862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:22:15,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:22:15,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 12:22:15,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372690095] [2021-12-21 12:22:15,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:22:15,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:22:15,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:22:15,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:22:15,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 12:22:15,157 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-12-21 12:22:15,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:22:15,177 INFO L93 Difference]: Finished difference Result 38 states and 55 transitions. [2021-12-21 12:22:15,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 12:22:15,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2021-12-21 12:22:15,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:22:15,178 INFO L225 Difference]: With dead ends: 38 [2021-12-21 12:22:15,178 INFO L226 Difference]: Without dead ends: 21 [2021-12-21 12:22:15,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 12:22:15,180 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:22:15,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 31 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:22:15,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-21 12:22:15,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-21 12:22:15,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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) [2021-12-21 12:22:15,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 30 transitions. [2021-12-21 12:22:15,183 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 30 transitions. Word has length 12 [2021-12-21 12:22:15,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:22:15,184 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 30 transitions. [2021-12-21 12:22:15,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-12-21 12:22:15,184 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 30 transitions. [2021-12-21 12:22:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 12:22:15,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:22:15,185 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:22:15,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 12:22:15,185 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:22:15,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:22:15,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1431516133, now seen corresponding path program 1 times [2021-12-21 12:22:15,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:22:15,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070630431] [2021-12-21 12:22:15,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:15,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:22:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:22:15,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:22:15,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070630431] [2021-12-21 12:22:15,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070630431] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:22:15,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177770453] [2021-12-21 12:22:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:15,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:22:15,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:22:15,296 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) [2021-12-21 12:22:15,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 12:22:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:15,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 12:22:15,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:22:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:22:15,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:22:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:22:15,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177770453] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:22:15,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:22:15,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-21 12:22:15,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548890208] [2021-12-21 12:22:15,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:22:15,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:22:15,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:22:15,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:22:15,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:22:15,433 INFO L87 Difference]: Start difference. First operand 21 states and 30 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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) [2021-12-21 12:22:15,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:22:15,515 INFO L93 Difference]: Finished difference Result 84 states and 118 transitions. [2021-12-21 12:22:15,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 12:22:15,515 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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 12 [2021-12-21 12:22:15,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:22:15,517 INFO L225 Difference]: With dead ends: 84 [2021-12-21 12:22:15,517 INFO L226 Difference]: Without dead ends: 71 [2021-12-21 12:22:15,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-21 12:22:15,518 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:22:15,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 62 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:22:15,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-21 12:22:15,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 33. [2021-12-21 12:22:15,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 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) [2021-12-21 12:22:15,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 47 transitions. [2021-12-21 12:22:15,525 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 47 transitions. Word has length 12 [2021-12-21 12:22:15,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:22:15,525 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 47 transitions. [2021-12-21 12:22:15,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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) [2021-12-21 12:22:15,526 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 47 transitions. [2021-12-21 12:22:15,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 12:22:15,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:22:15,526 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:22:15,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 12:22:15,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-21 12:22:15,743 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:22:15,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:22:15,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1643101482, now seen corresponding path program 1 times [2021-12-21 12:22:15,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:22:15,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473306200] [2021-12-21 12:22:15,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:15,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:22:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:15,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:22:15,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:22:15,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473306200] [2021-12-21 12:22:15,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473306200] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:22:15,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928481718] [2021-12-21 12:22:15,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:15,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:22:15,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:22:15,865 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) [2021-12-21 12:22:15,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 12:22:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:15,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 12:22:15,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:22:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:22:15,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:22:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:22:15,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928481718] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:22:15,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:22:15,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 9 [2021-12-21 12:22:15,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826614317] [2021-12-21 12:22:15,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:22:15,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 12:22:15,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:22:15,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 12:22:15,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:22:15,964 INFO L87 Difference]: Start difference. First operand 33 states and 47 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2021-12-21 12:22:16,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:22:16,108 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2021-12-21 12:22:16,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 12:22:16,109 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 14 [2021-12-21 12:22:16,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:22:16,109 INFO L225 Difference]: With dead ends: 77 [2021-12-21 12:22:16,109 INFO L226 Difference]: Without dead ends: 67 [2021-12-21 12:22:16,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:22:16,111 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 40 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:22:16,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 57 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:22:16,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-21 12:22:16,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2021-12-21 12:22:16,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 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) [2021-12-21 12:22:16,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2021-12-21 12:22:16,117 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 14 [2021-12-21 12:22:16,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:22:16,118 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2021-12-21 12:22:16,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2021-12-21 12:22:16,118 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2021-12-21 12:22:16,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 12:22:16,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:22:16,119 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:22:16,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 12:22:16,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-21 12:22:16,349 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:22:16,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:22:16,350 INFO L85 PathProgramCache]: Analyzing trace with hash 834986528, now seen corresponding path program 2 times [2021-12-21 12:22:16,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:22:16,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118136039] [2021-12-21 12:22:16,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:16,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:22:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:22:16,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:22:16,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118136039] [2021-12-21 12:22:16,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118136039] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:22:16,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936759896] [2021-12-21 12:22:16,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 12:22:16,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:22:16,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:22:16,445 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) [2021-12-21 12:22:16,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 12:22:16,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 12:22:16,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:22:16,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 12:22:16,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:22:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:22:16,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:22:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:22:16,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936759896] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:22:16,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:22:16,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-12-21 12:22:16,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784134438] [2021-12-21 12:22:16,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:22:16,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 12:22:16,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:22:16,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 12:22:16,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-12-21 12:22:16,608 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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) [2021-12-21 12:22:17,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:22:17,230 INFO L93 Difference]: Finished difference Result 223 states and 326 transitions. [2021-12-21 12:22:17,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-21 12:22:17,230 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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 15 [2021-12-21 12:22:17,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:22:17,232 INFO L225 Difference]: With dead ends: 223 [2021-12-21 12:22:17,232 INFO L226 Difference]: Without dead ends: 206 [2021-12-21 12:22:17,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2021-12-21 12:22:17,233 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 366 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 12:22:17,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 282 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 12:22:17,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-12-21 12:22:17,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 70. [2021-12-21 12:22:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.434782608695652) internal successors, (99), 69 states have internal predecessors, (99), 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) [2021-12-21 12:22:17,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 99 transitions. [2021-12-21 12:22:17,255 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 99 transitions. Word has length 15 [2021-12-21 12:22:17,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:22:17,255 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 99 transitions. [2021-12-21 12:22:17,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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) [2021-12-21 12:22:17,256 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 99 transitions. [2021-12-21 12:22:17,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 12:22:17,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:22:17,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:22:17,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-21 12:22:17,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:22:17,474 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:22:17,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:22:17,475 INFO L85 PathProgramCache]: Analyzing trace with hash -71318983, now seen corresponding path program 1 times [2021-12-21 12:22:17,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:22:17,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410644556] [2021-12-21 12:22:17,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:17,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:22:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:22:17,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:22:17,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410644556] [2021-12-21 12:22:17,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410644556] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:22:17,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444551916] [2021-12-21 12:22:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:17,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:22:17,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:22:17,536 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) [2021-12-21 12:22:17,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 12:22:17,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:17,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 12:22:17,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:22:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:22:17,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:22:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:22:17,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444551916] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:22:17,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:22:17,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-21 12:22:17,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662092814] [2021-12-21 12:22:17,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:22:17,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 12:22:17,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:22:17,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 12:22:17,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:22:17,653 INFO L87 Difference]: Start difference. First operand 70 states and 99 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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) [2021-12-21 12:22:17,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:22:17,690 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2021-12-21 12:22:17,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 12:22:17,691 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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 16 [2021-12-21 12:22:17,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:22:17,692 INFO L225 Difference]: With dead ends: 77 [2021-12-21 12:22:17,692 INFO L226 Difference]: Without dead ends: 71 [2021-12-21 12:22:17,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-21 12:22:17,694 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:22:17,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:22:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-21 12:22:17,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-12-21 12:22:17,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 70 states have internal predecessors, (100), 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) [2021-12-21 12:22:17,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2021-12-21 12:22:17,711 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 16 [2021-12-21 12:22:17,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:22:17,712 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2021-12-21 12:22:17,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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) [2021-12-21 12:22:17,713 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2021-12-21 12:22:17,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 12:22:17,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:22:17,716 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:22:17,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 12:22:17,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:22:17,932 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:22:17,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:22:17,932 INFO L85 PathProgramCache]: Analyzing trace with hash -806394657, now seen corresponding path program 2 times [2021-12-21 12:22:17,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:22:17,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807238482] [2021-12-21 12:22:17,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:17,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:22:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:18,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 12:22:18,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:22:18,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807238482] [2021-12-21 12:22:18,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807238482] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:22:18,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925949404] [2021-12-21 12:22:18,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 12:22:18,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:22:18,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:22:18,016 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) [2021-12-21 12:22:18,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 12:22:18,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 12:22:18,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:22:18,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 12:22:18,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:22:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 12:22:18,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:22:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 12:22:18,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925949404] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:22:18,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:22:18,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2021-12-21 12:22:18,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141494039] [2021-12-21 12:22:18,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:22:18,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 12:22:18,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:22:18,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 12:22:18,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:22:18,122 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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) [2021-12-21 12:22:18,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:22:18,162 INFO L93 Difference]: Finished difference Result 91 states and 124 transitions. [2021-12-21 12:22:18,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 12:22:18,162 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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 17 [2021-12-21 12:22:18,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:22:18,163 INFO L225 Difference]: With dead ends: 91 [2021-12-21 12:22:18,163 INFO L226 Difference]: Without dead ends: 74 [2021-12-21 12:22:18,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:22:18,164 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:22:18,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 75 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:22:18,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-21 12:22:18,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2021-12-21 12:22:18,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.459016393442623) internal successors, (89), 61 states have internal predecessors, (89), 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) [2021-12-21 12:22:18,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-12-21 12:22:18,176 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 17 [2021-12-21 12:22:18,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:22:18,176 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-12-21 12:22:18,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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) [2021-12-21 12:22:18,176 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-12-21 12:22:18,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 12:22:18,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:22:18,177 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:22:18,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 12:22:18,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 12:22:18,395 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:22:18,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:22:18,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2118522240, now seen corresponding path program 1 times [2021-12-21 12:22:18,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:22:18,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989137472] [2021-12-21 12:22:18,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:18,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:22:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 12:22:18,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:22:18,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989137472] [2021-12-21 12:22:18,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989137472] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:22:18,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631707167] [2021-12-21 12:22:18,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:18,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:22:18,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:22:18,459 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) [2021-12-21 12:22:18,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 12:22:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:18,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 12:22:18,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:22:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 12:22:18,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:22:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 12:22:18,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631707167] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:22:18,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:22:18,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2021-12-21 12:22:18,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418871345] [2021-12-21 12:22:18,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:22:18,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 12:22:18,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:22:18,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 12:22:18,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-21 12:22:18,663 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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) [2021-12-21 12:22:18,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:22:18,812 INFO L93 Difference]: Finished difference Result 118 states and 156 transitions. [2021-12-21 12:22:18,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 12:22:18,813 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 17 [2021-12-21 12:22:18,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:22:18,813 INFO L225 Difference]: With dead ends: 118 [2021-12-21 12:22:18,813 INFO L226 Difference]: Without dead ends: 98 [2021-12-21 12:22:18,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-12-21 12:22:18,814 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 70 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:22:18,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 127 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:22:18,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-21 12:22:18,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 58. [2021-12-21 12:22:18,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 57 states have internal predecessors, (82), 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) [2021-12-21 12:22:18,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 82 transitions. [2021-12-21 12:22:18,820 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 82 transitions. Word has length 17 [2021-12-21 12:22:18,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:22:18,820 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 82 transitions. [2021-12-21 12:22:18,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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) [2021-12-21 12:22:18,821 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 82 transitions. [2021-12-21 12:22:18,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 12:22:18,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:22:18,821 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:22:18,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 12:22:19,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:22:19,035 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:22:19,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:22:19,036 INFO L85 PathProgramCache]: Analyzing trace with hash 855427872, now seen corresponding path program 2 times [2021-12-21 12:22:19,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:22:19,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992706757] [2021-12-21 12:22:19,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:19,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:22:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:22:19,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:22:19,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992706757] [2021-12-21 12:22:19,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992706757] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:22:19,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127452549] [2021-12-21 12:22:19,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 12:22:19,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:22:19,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:22:19,112 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) [2021-12-21 12:22:19,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 12:22:19,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 12:22:19,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:22:19,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 12:22:19,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:22:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 12:22:19,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:22:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 12:22:19,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127452549] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:22:19,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:22:19,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2021-12-21 12:22:19,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884576614] [2021-12-21 12:22:19,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:22:19,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 12:22:19,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:22:19,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 12:22:19,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-12-21 12:22:19,400 INFO L87 Difference]: Start difference. First operand 58 states and 82 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 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) [2021-12-21 12:22:20,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:22:20,074 INFO L93 Difference]: Finished difference Result 137 states and 188 transitions. [2021-12-21 12:22:20,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 12:22:20,075 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 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 17 [2021-12-21 12:22:20,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:22:20,075 INFO L225 Difference]: With dead ends: 137 [2021-12-21 12:22:20,075 INFO L226 Difference]: Without dead ends: 118 [2021-12-21 12:22:20,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2021-12-21 12:22:20,076 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 101 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 12:22:20,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 154 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 12:22:20,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-21 12:22:20,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 80. [2021-12-21 12:22:20,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 79 states have internal predecessors, (112), 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) [2021-12-21 12:22:20,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 112 transitions. [2021-12-21 12:22:20,082 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 112 transitions. Word has length 17 [2021-12-21 12:22:20,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:22:20,091 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 112 transitions. [2021-12-21 12:22:20,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 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) [2021-12-21 12:22:20,092 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 112 transitions. [2021-12-21 12:22:20,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 12:22:20,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:22:20,092 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:22:20,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 12:22:20,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:22:20,303 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:22:20,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:22:20,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1780724800, now seen corresponding path program 1 times [2021-12-21 12:22:20,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:22:20,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347767392] [2021-12-21 12:22:20,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:20,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:22:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 12:22:20,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:22:20,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347767392] [2021-12-21 12:22:20,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347767392] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:22:20,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185070246] [2021-12-21 12:22:20,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:20,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:22:20,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:22:20,353 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:22:20,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 12:22:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:20,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 12:22:20,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:22:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 12:22:20,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:22:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 12:22:20,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185070246] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:22:20,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:22:20,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2021-12-21 12:22:20,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438530898] [2021-12-21 12:22:20,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:22:20,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 12:22:20,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:22:20,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 12:22:20,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:22:20,484 INFO L87 Difference]: Start difference. First operand 80 states and 112 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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) [2021-12-21 12:22:20,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:22:20,576 INFO L93 Difference]: Finished difference Result 110 states and 148 transitions. [2021-12-21 12:22:20,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:22:20,576 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 19 [2021-12-21 12:22:20,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:22:20,577 INFO L225 Difference]: With dead ends: 110 [2021-12-21 12:22:20,577 INFO L226 Difference]: Without dead ends: 101 [2021-12-21 12:22:20,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-21 12:22:20,577 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 44 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:22:20,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 65 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:22:20,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-21 12:22:20,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 81. [2021-12-21 12:22:20,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.375) internal successors, (110), 80 states have internal predecessors, (110), 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) [2021-12-21 12:22:20,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 110 transitions. [2021-12-21 12:22:20,584 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 110 transitions. Word has length 19 [2021-12-21 12:22:20,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:22:20,584 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 110 transitions. [2021-12-21 12:22:20,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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) [2021-12-21 12:22:20,584 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 110 transitions. [2021-12-21 12:22:20,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 12:22:20,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:22:20,585 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:22:20,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-21 12:22:20,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 12:22:20,795 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:22:20,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:22:20,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1674725392, now seen corresponding path program 2 times [2021-12-21 12:22:20,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:22:20,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099388555] [2021-12-21 12:22:20,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:20,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:22:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 12:22:20,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:22:20,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099388555] [2021-12-21 12:22:20,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099388555] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:22:20,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800034281] [2021-12-21 12:22:20,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 12:22:20,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:22:20,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:22:20,893 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:22:20,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 12:22:20,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 12:22:20,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:22:20,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 12:22:20,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:22:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 12:22:21,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:22:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 12:22:21,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800034281] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:22:21,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:22:21,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-12-21 12:22:21,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073329816] [2021-12-21 12:22:21,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:22:21,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 12:22:21,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:22:21,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 12:22:21,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-12-21 12:22:21,127 INFO L87 Difference]: Start difference. First operand 81 states and 110 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 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) [2021-12-21 12:22:23,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:22:23,273 INFO L93 Difference]: Finished difference Result 313 states and 428 transitions. [2021-12-21 12:22:23,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-21 12:22:23,274 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 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 19 [2021-12-21 12:22:23,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:22:23,275 INFO L225 Difference]: With dead ends: 313 [2021-12-21 12:22:23,275 INFO L226 Difference]: Without dead ends: 285 [2021-12-21 12:22:23,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1180, Invalid=3376, Unknown=0, NotChecked=0, Total=4556 [2021-12-21 12:22:23,277 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 462 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 12:22:23,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 390 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 12:22:23,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-12-21 12:22:23,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 100. [2021-12-21 12:22:23,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.3737373737373737) internal successors, (136), 99 states have internal predecessors, (136), 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) [2021-12-21 12:22:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 136 transitions. [2021-12-21 12:22:23,286 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 136 transitions. Word has length 19 [2021-12-21 12:22:23,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:22:23,286 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 136 transitions. [2021-12-21 12:22:23,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 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) [2021-12-21 12:22:23,287 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 136 transitions. [2021-12-21 12:22:23,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-21 12:22:23,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:22:23,287 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:22:23,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 12:22:23,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-21 12:22:23,504 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:22:23,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:22:23,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1617038102, now seen corresponding path program 3 times [2021-12-21 12:22:23,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:22:23,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91503964] [2021-12-21 12:22:23,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:23,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:22:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:22:23,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:22:23,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91503964] [2021-12-21 12:22:23,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91503964] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:22:23,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276683115] [2021-12-21 12:22:23,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 12:22:23,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:22:23,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:22:23,624 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:22:23,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 12:22:23,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 12:22:23,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:22:23,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 12:22:23,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:22:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 12:22:23,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:22:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 12:22:23,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276683115] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:22:23,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:22:23,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2021-12-21 12:22:23,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873983033] [2021-12-21 12:22:23,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:22:23,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-21 12:22:23,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:22:23,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-21 12:22:23,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-12-21 12:22:23,959 INFO L87 Difference]: Start difference. First operand 100 states and 136 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2021-12-21 12:22:25,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:22:25,977 INFO L93 Difference]: Finished difference Result 219 states and 293 transitions. [2021-12-21 12:22:25,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-21 12:22:25,977 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 20 [2021-12-21 12:22:25,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:22:25,978 INFO L225 Difference]: With dead ends: 219 [2021-12-21 12:22:25,978 INFO L226 Difference]: Without dead ends: 193 [2021-12-21 12:22:25,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=531, Invalid=4439, Unknown=0, NotChecked=0, Total=4970 [2021-12-21 12:22:25,979 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 185 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 12:22:25,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 267 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 12:22:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-12-21 12:22:25,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 122. [2021-12-21 12:22:25,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.3884297520661157) internal successors, (168), 121 states have internal predecessors, (168), 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) [2021-12-21 12:22:25,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 168 transitions. [2021-12-21 12:22:25,991 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 168 transitions. Word has length 20 [2021-12-21 12:22:25,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:22:25,991 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 168 transitions. [2021-12-21 12:22:25,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2021-12-21 12:22:25,992 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 168 transitions. [2021-12-21 12:22:25,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 12:22:25,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:22:25,993 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:22:26,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 12:22:26,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 12:22:26,211 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:22:26,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:22:26,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1455648122, now seen corresponding path program 3 times [2021-12-21 12:22:26,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:22:26,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975792787] [2021-12-21 12:22:26,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:26,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:22:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 12:22:26,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:22:26,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975792787] [2021-12-21 12:22:26,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975792787] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:22:26,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456570698] [2021-12-21 12:22:26,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 12:22:26,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:22:26,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:22:26,305 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:22:26,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 12:22:26,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-21 12:22:26,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:22:26,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-21 12:22:26,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:22:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 12:22:26,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:22:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 12:22:26,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456570698] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:22:26,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:22:26,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 10] total 22 [2021-12-21 12:22:26,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108098415] [2021-12-21 12:22:26,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:22:26,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-21 12:22:26,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:22:26,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-21 12:22:26,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-12-21 12:22:26,757 INFO L87 Difference]: Start difference. First operand 122 states and 168 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 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) [2021-12-21 12:22:27,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:22:27,190 INFO L93 Difference]: Finished difference Result 261 states and 350 transitions. [2021-12-21 12:22:27,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-21 12:22:27,191 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 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 22 [2021-12-21 12:22:27,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:22:27,192 INFO L225 Difference]: With dead ends: 261 [2021-12-21 12:22:27,192 INFO L226 Difference]: Without dead ends: 238 [2021-12-21 12:22:27,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2021-12-21 12:22:27,193 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 216 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 12:22:27,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 258 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 12:22:27,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-21 12:22:27,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 168. [2021-12-21 12:22:27,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.4610778443113772) internal successors, (244), 167 states have internal predecessors, (244), 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) [2021-12-21 12:22:27,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 244 transitions. [2021-12-21 12:22:27,221 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 244 transitions. Word has length 22 [2021-12-21 12:22:27,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:22:27,221 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 244 transitions. [2021-12-21 12:22:27,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 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) [2021-12-21 12:22:27,222 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 244 transitions. [2021-12-21 12:22:27,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 12:22:27,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:22:27,224 INFO L514 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:22:27,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 12:22:27,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-21 12:22:27,437 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:22:27,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:22:27,437 INFO L85 PathProgramCache]: Analyzing trace with hash -437492933, now seen corresponding path program 3 times [2021-12-21 12:22:27,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:22:27,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260081897] [2021-12-21 12:22:27,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:27,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:22:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:22:27,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:22:27,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260081897] [2021-12-21 12:22:27,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260081897] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:22:27,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850043218] [2021-12-21 12:22:27,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 12:22:27,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:22:27,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:22:27,608 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:22:27,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 12:22:27,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-21 12:22:27,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:22:27,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 12:22:27,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:22:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:22:27,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:22:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:22:27,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850043218] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:22:27,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:22:27,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2021-12-21 12:22:27,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106368679] [2021-12-21 12:22:27,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:22:27,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-21 12:22:27,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:22:27,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-21 12:22:27,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2021-12-21 12:22:27,898 INFO L87 Difference]: Start difference. First operand 168 states and 244 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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) [2021-12-21 12:22:42,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:22:42,884 INFO L93 Difference]: Finished difference Result 952 states and 1466 transitions. [2021-12-21 12:22:42,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-21 12:22:42,885 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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 22 [2021-12-21 12:22:42,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:22:42,888 INFO L225 Difference]: With dead ends: 952 [2021-12-21 12:22:42,888 INFO L226 Difference]: Without dead ends: 917 [2021-12-21 12:22:42,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=811, Invalid=1541, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 12:22:42,893 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1241 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 12:22:42,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1241 Valid, 1328 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 12:22:42,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-12-21 12:22:42,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 255. [2021-12-21 12:22:42,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.4448818897637796) internal successors, (367), 254 states have internal predecessors, (367), 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) [2021-12-21 12:22:42,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 367 transitions. [2021-12-21 12:22:42,925 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 367 transitions. Word has length 22 [2021-12-21 12:22:42,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:22:42,925 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 367 transitions. [2021-12-21 12:22:42,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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) [2021-12-21 12:22:42,926 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 367 transitions. [2021-12-21 12:22:42,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 12:22:42,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:22:42,926 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:22:42,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 12:22:43,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 12:22:43,131 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:22:43,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:22:43,132 INFO L85 PathProgramCache]: Analyzing trace with hash 824854335, now seen corresponding path program 2 times [2021-12-21 12:22:43,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:22:43,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981825853] [2021-12-21 12:22:43,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:43,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:22:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 12:22:43,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:22:43,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981825853] [2021-12-21 12:22:43,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981825853] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:22:43,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884142585] [2021-12-21 12:22:43,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 12:22:43,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:22:43,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:22:43,206 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:22:43,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 12:22:43,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 12:22:43,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:22:43,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 12:22:43,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:22:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 12:22:43,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:22:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 12:22:43,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884142585] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:22:43,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:22:43,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2021-12-21 12:22:43,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852501491] [2021-12-21 12:22:43,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:22:43,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 12:22:43,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:22:43,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 12:22:43,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-21 12:22:43,353 INFO L87 Difference]: Start difference. First operand 255 states and 367 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-12-21 12:22:43,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:22:43,483 INFO L93 Difference]: Finished difference Result 298 states and 422 transitions. [2021-12-21 12:22:43,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 12:22:43,484 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 23 [2021-12-21 12:22:43,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:22:43,484 INFO L225 Difference]: With dead ends: 298 [2021-12-21 12:22:43,485 INFO L226 Difference]: Without dead ends: 285 [2021-12-21 12:22:43,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-21 12:22:43,485 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 59 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:22:43,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 135 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:22:43,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-12-21 12:22:43,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 258. [2021-12-21 12:22:43,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.424124513618677) internal successors, (366), 257 states have internal predecessors, (366), 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) [2021-12-21 12:22:43,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 366 transitions. [2021-12-21 12:22:43,512 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 366 transitions. Word has length 23 [2021-12-21 12:22:43,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:22:43,512 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 366 transitions. [2021-12-21 12:22:43,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-12-21 12:22:43,512 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 366 transitions. [2021-12-21 12:22:43,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 12:22:43,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:22:43,513 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:22:43,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-21 12:22:43,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-21 12:22:43,727 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:22:43,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:22:43,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1390241056, now seen corresponding path program 4 times [2021-12-21 12:22:43,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:22:43,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083676010] [2021-12-21 12:22:43,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:43,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:22:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:22:43,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:22:43,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083676010] [2021-12-21 12:22:43,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083676010] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:22:43,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084394257] [2021-12-21 12:22:43,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 12:22:43,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:22:43,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:22:43,853 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:22:43,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 12:22:43,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 12:22:43,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:22:43,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 12:22:43,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:22:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 12:22:43,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:22:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 12:22:44,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084394257] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:22:44,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:22:44,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2021-12-21 12:22:44,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702140234] [2021-12-21 12:22:44,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:22:44,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 12:22:44,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:22:44,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 12:22:44,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-12-21 12:22:44,018 INFO L87 Difference]: Start difference. First operand 258 states and 366 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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) [2021-12-21 12:22:46,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:22:46,270 INFO L93 Difference]: Finished difference Result 401 states and 549 transitions. [2021-12-21 12:22:46,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-21 12:22:46,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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 23 [2021-12-21 12:22:46,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:22:46,271 INFO L225 Difference]: With dead ends: 401 [2021-12-21 12:22:46,271 INFO L226 Difference]: Without dead ends: 360 [2021-12-21 12:22:46,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1692 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=610, Invalid=5242, Unknown=0, NotChecked=0, Total=5852 [2021-12-21 12:22:46,273 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 196 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 12:22:46,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 241 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 12:22:46,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-21 12:22:46,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 263. [2021-12-21 12:22:46,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.3969465648854962) internal successors, (366), 262 states have internal predecessors, (366), 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) [2021-12-21 12:22:46,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 366 transitions. [2021-12-21 12:22:46,326 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 366 transitions. Word has length 23 [2021-12-21 12:22:46,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:22:46,326 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 366 transitions. [2021-12-21 12:22:46,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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) [2021-12-21 12:22:46,326 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 366 transitions. [2021-12-21 12:22:46,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 12:22:46,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:22:46,327 INFO L514 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:22:46,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-21 12:22:46,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:22:46,543 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:22:46,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:22:46,544 INFO L85 PathProgramCache]: Analyzing trace with hash 89056265, now seen corresponding path program 1 times [2021-12-21 12:22:46,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:22:46,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113292423] [2021-12-21 12:22:46,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:46,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:22:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:46,662 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:22:46,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:22:46,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113292423] [2021-12-21 12:22:46,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113292423] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:22:46,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936780984] [2021-12-21 12:22:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:22:46,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:22:46,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:22:46,664 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:22:46,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 12:22:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:22:46,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-21 12:22:46,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:22:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:22:46,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:22:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 12:22:47,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936780984] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:22:47,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:22:47,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2021-12-21 12:22:47,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040805445] [2021-12-21 12:22:47,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:22:47,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-21 12:22:47,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:22:47,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-21 12:22:47,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2021-12-21 12:22:47,089 INFO L87 Difference]: Start difference. First operand 263 states and 366 transitions. Second operand has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 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) [2021-12-21 12:23:24,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:23:24,157 INFO L93 Difference]: Finished difference Result 1046 states and 1531 transitions. [2021-12-21 12:23:24,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-21 12:23:24,158 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 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 24 [2021-12-21 12:23:24,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:23:24,160 INFO L225 Difference]: With dead ends: 1046 [2021-12-21 12:23:24,160 INFO L226 Difference]: Without dead ends: 1006 [2021-12-21 12:23:24,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 35.2s TimeCoverageRelationStatistics Valid=1855, Invalid=4151, Unknown=0, NotChecked=0, Total=6006 [2021-12-21 12:23:24,162 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1751 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 767 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1751 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 767 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:23:24,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1751 Valid, 1385 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [767 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-21 12:23:24,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-12-21 12:23:24,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 279. [2021-12-21 12:23:24,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.3992805755395683) internal successors, (389), 278 states have internal predecessors, (389), 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) [2021-12-21 12:23:24,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 389 transitions. [2021-12-21 12:23:24,197 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 389 transitions. Word has length 24 [2021-12-21 12:23:24,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:23:24,197 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 389 transitions. [2021-12-21 12:23:24,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 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) [2021-12-21 12:23:24,198 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 389 transitions. [2021-12-21 12:23:24,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-21 12:23:24,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:23:24,198 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:23:24,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-21 12:23:24,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:23:24,411 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:23:24,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:23:24,421 INFO L85 PathProgramCache]: Analyzing trace with hash -2074329332, now seen corresponding path program 3 times [2021-12-21 12:23:24,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:23:24,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676683293] [2021-12-21 12:23:24,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:23:24,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:23:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:23:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 12:23:24,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:23:24,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676683293] [2021-12-21 12:23:24,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676683293] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:23:24,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105360606] [2021-12-21 12:23:24,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 12:23:24,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:23:24,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:23:24,564 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:23:24,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-21 12:23:24,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 12:23:24,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:23:24,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 12:23:24,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:23:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 12:23:24,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:23:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 12:23:24,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105360606] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:23:24,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:23:24,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 23 [2021-12-21 12:23:24,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889358570] [2021-12-21 12:23:24,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:23:24,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-21 12:23:24,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:23:24,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-21 12:23:24,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-12-21 12:23:24,824 INFO L87 Difference]: Start difference. First operand 279 states and 389 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 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) [2021-12-21 12:23:28,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:23:28,273 INFO L93 Difference]: Finished difference Result 850 states and 1052 transitions. [2021-12-21 12:23:28,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-12-21 12:23:28,274 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 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 26 [2021-12-21 12:23:28,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:23:28,276 INFO L225 Difference]: With dead ends: 850 [2021-12-21 12:23:28,276 INFO L226 Difference]: Without dead ends: 811 [2021-12-21 12:23:28,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4065 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1472, Invalid=11184, Unknown=0, NotChecked=0, Total=12656 [2021-12-21 12:23:28,278 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 627 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 1478 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 1884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 1478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:23:28,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 1260 Invalid, 1884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 1478 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 12:23:28,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-12-21 12:23:28,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 315. [2021-12-21 12:23:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.4363057324840764) internal successors, (451), 314 states have internal predecessors, (451), 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) [2021-12-21 12:23:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 451 transitions. [2021-12-21 12:23:28,328 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 451 transitions. Word has length 26 [2021-12-21 12:23:28,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:23:28,328 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 451 transitions. [2021-12-21 12:23:28,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 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) [2021-12-21 12:23:28,329 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 451 transitions. [2021-12-21 12:23:28,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 12:23:28,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:23:28,329 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:23:28,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-21 12:23:28,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:23:28,546 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:23:28,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:23:28,546 INFO L85 PathProgramCache]: Analyzing trace with hash -492280992, now seen corresponding path program 4 times [2021-12-21 12:23:28,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:23:28,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214817607] [2021-12-21 12:23:28,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:23:28,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:23:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:23:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 12:23:28,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:23:28,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214817607] [2021-12-21 12:23:28,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214817607] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:23:28,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002446571] [2021-12-21 12:23:28,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 12:23:28,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:23:28,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:23:28,644 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:23:28,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-21 12:23:28,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 12:23:28,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:23:28,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-21 12:23:28,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:23:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 12:23:28,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:23:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 12:23:28,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002446571] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:23:28,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:23:28,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-12-21 12:23:28,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752922715] [2021-12-21 12:23:28,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:23:28,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-21 12:23:28,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:23:28,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-21 12:23:28,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-12-21 12:23:28,884 INFO L87 Difference]: Start difference. First operand 315 states and 451 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 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)