./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 007fc8a389a67fb47c7d326d3f1d284696dfe5de13661e77d6d1bf7cce285194 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 19:49:32,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 19:49:32,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 19:49:32,267 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 19:49:32,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 19:49:32,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 19:49:32,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 19:49:32,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 19:49:32,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 19:49:32,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 19:49:32,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 19:49:32,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 19:49:32,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 19:49:32,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 19:49:32,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 19:49:32,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 19:49:32,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 19:49:32,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 19:49:32,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 19:49:32,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 19:49:32,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 19:49:32,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 19:49:32,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 19:49:32,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 19:49:32,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 19:49:32,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 19:49:32,296 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 19:49:32,297 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 19:49:32,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 19:49:32,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 19:49:32,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 19:49:32,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 19:49:32,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 19:49:32,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 19:49:32,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 19:49:32,300 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 19:49:32,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 19:49:32,301 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 19:49:32,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 19:49:32,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 19:49:32,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 19:49:32,303 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 19:49:32,317 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 19:49:32,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 19:49:32,317 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 19:49:32,317 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 19:49:32,318 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 19:49:32,318 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 19:49:32,319 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 19:49:32,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 19:49:32,319 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 19:49:32,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 19:49:32,319 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 19:49:32,320 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 19:49:32,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 19:49:32,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 19:49:32,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 19:49:32,320 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 19:49:32,320 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 19:49:32,321 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 19:49:32,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 19:49:32,321 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 19:49:32,321 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 19:49:32,321 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 19:49:32,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 19:49:32,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 19:49:32,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 19:49:32,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:49:32,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 19:49:32,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 19:49:32,323 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 19:49:32,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 19:49:32,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 19:49:32,323 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 007fc8a389a67fb47c7d326d3f1d284696dfe5de13661e77d6d1bf7cce285194 [2021-12-18 19:49:32,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 19:49:32,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 19:49:32,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 19:49:32,529 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 19:49:32,530 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 19:49:32,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i [2021-12-18 19:49:32,601 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cbb13404/9dc9f65750924afc8f1a8653d4c411fd/FLAG6ac021f4a [2021-12-18 19:49:33,008 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 19:49:33,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i [2021-12-18 19:49:33,022 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cbb13404/9dc9f65750924afc8f1a8653d4c411fd/FLAG6ac021f4a [2021-12-18 19:49:33,034 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cbb13404/9dc9f65750924afc8f1a8653d4c411fd [2021-12-18 19:49:33,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 19:49:33,038 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 19:49:33,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 19:49:33,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 19:49:33,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 19:49:33,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:49:33" (1/1) ... [2021-12-18 19:49:33,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eb325ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:49:33, skipping insertion in model container [2021-12-18 19:49:33,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:49:33" (1/1) ... [2021-12-18 19:49:33,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 19:49:33,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 19:49:33,269 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:49:33,274 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 19:49:33,296 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:49:33,312 INFO L208 MainTranslator]: Completed translation [2021-12-18 19:49:33,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:49:33 WrapperNode [2021-12-18 19:49:33,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 19:49:33,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 19:49:33,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 19:49:33,314 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 19:49:33,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:49:33" (1/1) ... [2021-12-18 19:49:33,336 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:49:33" (1/1) ... [2021-12-18 19:49:33,354 INFO L137 Inliner]: procedures = 117, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-12-18 19:49:33,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 19:49:33,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 19:49:33,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 19:49:33,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 19:49:33,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:49:33" (1/1) ... [2021-12-18 19:49:33,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:49:33" (1/1) ... [2021-12-18 19:49:33,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:49:33" (1/1) ... [2021-12-18 19:49:33,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:49:33" (1/1) ... [2021-12-18 19:49:33,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:49:33" (1/1) ... [2021-12-18 19:49:33,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:49:33" (1/1) ... [2021-12-18 19:49:33,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:49:33" (1/1) ... [2021-12-18 19:49:33,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 19:49:33,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 19:49:33,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 19:49:33,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 19:49:33,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:49:33" (1/1) ... [2021-12-18 19:49:33,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:49:33,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:33,418 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) [2021-12-18 19:49:33,422 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 [2021-12-18 19:49:33,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 19:49:33,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 19:49:33,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 19:49:33,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 19:49:33,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 19:49:33,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 19:49:33,513 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 19:49:33,519 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 19:49:33,598 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 19:49:33,602 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 19:49:33,602 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-18 19:49:33,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:49:33 BoogieIcfgContainer [2021-12-18 19:49:33,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 19:49:33,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 19:49:33,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 19:49:33,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 19:49:33,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:49:33" (1/3) ... [2021-12-18 19:49:33,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208ca0bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:49:33, skipping insertion in model container [2021-12-18 19:49:33,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:49:33" (2/3) ... [2021-12-18 19:49:33,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208ca0bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:49:33, skipping insertion in model container [2021-12-18 19:49:33,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:49:33" (3/3) ... [2021-12-18 19:49:33,609 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cmemchr-alloca-2.i [2021-12-18 19:49:33,612 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 19:49:33,612 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-12-18 19:49:33,639 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 19:49:33,644 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-12-18 19:49:33,645 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-12-18 19:49:33,654 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.65) internal successors, (33), 25 states have internal predecessors, (33), 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) [2021-12-18 19:49:33,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:49:33,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:33,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:33,659 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:33,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:33,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-18 19:49:33,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:33,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062366673] [2021-12-18 19:49:33,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:33,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:33,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:33,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062366673] [2021-12-18 19:49:33,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062366673] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:49:33,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:49:33,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:49:33,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206845461] [2021-12-18 19:49:33,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:49:33,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:49:33,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:33,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:49:33,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:49:33,809 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.65) internal successors, (33), 25 states have internal predecessors, (33), 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 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-12-18 19:49:33,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:33,847 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-12-18 19:49:33,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:49:33,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2021-12-18 19:49:33,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:33,854 INFO L225 Difference]: With dead ends: 25 [2021-12-18 19:49:33,854 INFO L226 Difference]: Without dead ends: 23 [2021-12-18 19:49:33,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:49:33,861 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:33,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 29 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:49:33,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-18 19:49:33,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-18 19:49:33,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:49:33,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-12-18 19:49:33,883 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 7 [2021-12-18 19:49:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:33,883 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-12-18 19:49:33,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-12-18 19:49:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-12-18 19:49:33,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:49:33,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:33,884 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:33,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 19:49:33,885 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:33,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:33,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2021-12-18 19:49:33,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:33,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580089293] [2021-12-18 19:49:33,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:33,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:33,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:33,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580089293] [2021-12-18 19:49:33,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580089293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:49:33,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:49:33,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:49:33,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406912016] [2021-12-18 19:49:33,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:49:33,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:49:33,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:33,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:49:33,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:49:33,998 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-12-18 19:49:34,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:34,040 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-12-18 19:49:34,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:49:34,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-12-18 19:49:34,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:34,042 INFO L225 Difference]: With dead ends: 27 [2021-12-18 19:49:34,042 INFO L226 Difference]: Without dead ends: 27 [2021-12-18 19:49:34,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:49:34,046 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:34,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 43 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:49:34,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-18 19:49:34,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-12-18 19:49:34,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 24 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) [2021-12-18 19:49:34,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-12-18 19:49:34,053 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 7 [2021-12-18 19:49:34,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:34,053 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-12-18 19:49:34,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-12-18 19:49:34,054 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-12-18 19:49:34,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 19:49:34,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:34,055 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:34,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 19:49:34,056 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:34,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:34,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2021-12-18 19:49:34,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:34,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731907664] [2021-12-18 19:49:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:34,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:34,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:34,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731907664] [2021-12-18 19:49:34,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731907664] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:34,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323377126] [2021-12-18 19:49:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:34,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:34,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:34,156 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) [2021-12-18 19:49:34,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 19:49:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:34,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 19:49:34,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:34,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:49:34,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323377126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:49:34,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 19:49:34,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-12-18 19:49:34,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205872744] [2021-12-18 19:49:34,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:49:34,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:49:34,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:34,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:49:34,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:49:34,273 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2021-12-18 19:49:34,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:34,291 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-12-18 19:49:34,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:49:34,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 [2021-12-18 19:49:34,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:34,292 INFO L225 Difference]: With dead ends: 44 [2021-12-18 19:49:34,292 INFO L226 Difference]: Without dead ends: 44 [2021-12-18 19:49:34,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:49:34,293 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:34,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 61 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:49:34,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-18 19:49:34,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-12-18 19:49:34,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 30 states have internal predecessors, (36), 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) [2021-12-18 19:49:34,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-12-18 19:49:34,297 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 11 [2021-12-18 19:49:34,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:34,297 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-12-18 19:49:34,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2021-12-18 19:49:34,297 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-12-18 19:49:34,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 19:49:34,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:34,298 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:34,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-18 19:49:34,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:34,518 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:34,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:34,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1579537130, now seen corresponding path program 1 times [2021-12-18 19:49:34,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:34,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730177283] [2021-12-18 19:49:34,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:34,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:34,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:34,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730177283] [2021-12-18 19:49:34,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730177283] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:34,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534183644] [2021-12-18 19:49:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:34,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:34,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:34,631 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) [2021-12-18 19:49:34,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 19:49:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:34,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 19:49:34,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:34,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:49:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:34,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:34,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:34,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534183644] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:34,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:49:34,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-18 19:49:34,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819717126] [2021-12-18 19:49:34,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:34,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 19:49:34,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:34,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 19:49:34,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:49:34,899 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 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) [2021-12-18 19:49:34,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:34,941 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-12-18 19:49:34,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:49:34,941 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 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 [2021-12-18 19:49:34,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:34,941 INFO L225 Difference]: With dead ends: 32 [2021-12-18 19:49:34,942 INFO L226 Difference]: Without dead ends: 32 [2021-12-18 19:49:34,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-12-18 19:49:34,942 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:34,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 62 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:49:34,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-18 19:49:34,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2021-12-18 19:49:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 28 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) [2021-12-18 19:49:34,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-12-18 19:49:34,945 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 11 [2021-12-18 19:49:34,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:34,945 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-12-18 19:49:34,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 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) [2021-12-18 19:49:34,945 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-12-18 19:49:34,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 19:49:34,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:34,945 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:34,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 19:49:35,159 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,SelfDestructingSolverStorable3 [2021-12-18 19:49:35,160 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:35,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash -373722351, now seen corresponding path program 1 times [2021-12-18 19:49:35,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:35,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230696521] [2021-12-18 19:49:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:35,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:35,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:35,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230696521] [2021-12-18 19:49:35,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230696521] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:49:35,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:49:35,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:49:35,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979577314] [2021-12-18 19:49:35,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:49:35,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 19:49:35,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:35,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 19:49:35,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:49:35,217 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-12-18 19:49:35,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:35,276 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-12-18 19:49:35,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:49:35,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 [2021-12-18 19:49:35,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:35,279 INFO L225 Difference]: With dead ends: 30 [2021-12-18 19:49:35,279 INFO L226 Difference]: Without dead ends: 30 [2021-12-18 19:49:35,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:49:35,280 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:35,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 55 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:49:35,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-18 19:49:35,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-12-18 19:49:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 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) [2021-12-18 19:49:35,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-12-18 19:49:35,282 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 14 [2021-12-18 19:49:35,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:35,283 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-12-18 19:49:35,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-12-18 19:49:35,283 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-12-18 19:49:35,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 19:49:35,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:35,284 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:35,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 19:49:35,284 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:35,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:35,284 INFO L85 PathProgramCache]: Analyzing trace with hash -373722350, now seen corresponding path program 1 times [2021-12-18 19:49:35,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:35,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388761264] [2021-12-18 19:49:35,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:35,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:35,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:35,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388761264] [2021-12-18 19:49:35,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388761264] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:35,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168961934] [2021-12-18 19:49:35,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:35,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:35,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:35,373 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) [2021-12-18 19:49:35,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 19:49:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:35,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-18 19:49:35,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:35,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:35,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-12-18 19:49:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:35,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168961934] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:35,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:49:35,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2021-12-18 19:49:35,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107728333] [2021-12-18 19:49:35,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:35,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 19:49:35,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:35,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 19:49:35,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:49:35,589 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 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) [2021-12-18 19:49:35,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:35,722 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-12-18 19:49:35,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:49:35,723 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 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 [2021-12-18 19:49:35,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:35,723 INFO L225 Difference]: With dead ends: 34 [2021-12-18 19:49:35,723 INFO L226 Difference]: Without dead ends: 34 [2021-12-18 19:49:35,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-12-18 19:49:35,724 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 78 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:35,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 107 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:49:35,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-18 19:49:35,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-12-18 19:49:35,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.25) internal successors, (35), 29 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) [2021-12-18 19:49:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-12-18 19:49:35,726 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 14 [2021-12-18 19:49:35,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:35,726 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-12-18 19:49:35,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 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) [2021-12-18 19:49:35,726 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-12-18 19:49:35,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 19:49:35,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:35,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:35,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 19:49:35,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:35,927 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:35,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:35,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1300245881, now seen corresponding path program 1 times [2021-12-18 19:49:35,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:35,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663636666] [2021-12-18 19:49:35,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:35,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:35,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:49:35,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:35,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663636666] [2021-12-18 19:49:35,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663636666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:49:35,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:49:35,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:49:35,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912464032] [2021-12-18 19:49:35,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:49:35,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:49:35,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:35,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:49:35,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:49:35,970 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-12-18 19:49:35,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:35,988 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-12-18 19:49:35,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:49:35,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 [2021-12-18 19:49:35,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:35,989 INFO L225 Difference]: With dead ends: 49 [2021-12-18 19:49:35,989 INFO L226 Difference]: Without dead ends: 49 [2021-12-18 19:49:35,989 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 [2021-12-18 19:49:35,989 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:35,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 68 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:49:35,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-18 19:49:35,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2021-12-18 19:49:35,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 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) [2021-12-18 19:49:35,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-12-18 19:49:35,991 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 15 [2021-12-18 19:49:35,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:35,991 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-12-18 19:49:35,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2021-12-18 19:49:35,992 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-12-18 19:49:35,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 19:49:35,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:35,992 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:35,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-18 19:49:35,992 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:35,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:35,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1558411319, now seen corresponding path program 1 times [2021-12-18 19:49:35,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:35,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820080558] [2021-12-18 19:49:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:35,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:49:36,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:36,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820080558] [2021-12-18 19:49:36,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820080558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:49:36,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:49:36,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:49:36,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972018350] [2021-12-18 19:49:36,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:49:36,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:49:36,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:36,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:49:36,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:49:36,033 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-12-18 19:49:36,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:36,049 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-12-18 19:49:36,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:49:36,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 [2021-12-18 19:49:36,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:36,050 INFO L225 Difference]: With dead ends: 37 [2021-12-18 19:49:36,050 INFO L226 Difference]: Without dead ends: 37 [2021-12-18 19:49:36,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:49:36,051 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:36,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 38 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:49:36,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-18 19:49:36,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-12-18 19:49:36,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 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) [2021-12-18 19:49:36,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-12-18 19:49:36,053 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 15 [2021-12-18 19:49:36,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:36,053 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-12-18 19:49:36,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-12-18 19:49:36,053 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-12-18 19:49:36,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 19:49:36,053 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:36,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:36,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-18 19:49:36,053 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:36,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:36,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1007310944, now seen corresponding path program 1 times [2021-12-18 19:49:36,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:36,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678246921] [2021-12-18 19:49:36,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:36,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:49:36,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:36,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678246921] [2021-12-18 19:49:36,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678246921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:49:36,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:49:36,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:49:36,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416248854] [2021-12-18 19:49:36,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:49:36,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:49:36,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:36,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:49:36,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:49:36,143 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-12-18 19:49:36,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:36,153 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-12-18 19:49:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:49:36,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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 [2021-12-18 19:49:36,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:36,154 INFO L225 Difference]: With dead ends: 29 [2021-12-18 19:49:36,155 INFO L226 Difference]: Without dead ends: 26 [2021-12-18 19:49:36,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:49:36,156 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:36,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:49:36,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-18 19:49:36,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-18 19:49:36,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:49:36,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-12-18 19:49:36,162 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2021-12-18 19:49:36,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:36,163 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-12-18 19:49:36,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-12-18 19:49:36,163 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-12-18 19:49:36,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 19:49:36,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:36,163 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:36,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-18 19:49:36,165 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:36,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:36,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1656754904, now seen corresponding path program 1 times [2021-12-18 19:49:36,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:36,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317494207] [2021-12-18 19:49:36,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:36,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:49:36,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:36,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317494207] [2021-12-18 19:49:36,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317494207] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:49:36,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:49:36,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:49:36,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120451244] [2021-12-18 19:49:36,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:49:36,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:49:36,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:36,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:49:36,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:49:36,231 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2021-12-18 19:49:36,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:36,256 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-12-18 19:49:36,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:49:36,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 19 [2021-12-18 19:49:36,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:36,257 INFO L225 Difference]: With dead ends: 33 [2021-12-18 19:49:36,257 INFO L226 Difference]: Without dead ends: 20 [2021-12-18 19:49:36,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:49:36,258 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:36,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 54 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:49:36,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-18 19:49:36,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-18 19:49:36,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2021-12-18 19:49:36,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-12-18 19:49:36,259 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 19 [2021-12-18 19:49:36,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:36,259 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-12-18 19:49:36,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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) [2021-12-18 19:49:36,259 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-12-18 19:49:36,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 19:49:36,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:36,260 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:36,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-18 19:49:36,260 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:36,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1617144038, now seen corresponding path program 1 times [2021-12-18 19:49:36,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:36,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753702537] [2021-12-18 19:49:36,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:36,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:36,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:36,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753702537] [2021-12-18 19:49:36,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753702537] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:36,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679952857] [2021-12-18 19:49:36,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:36,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:36,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:36,341 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) [2021-12-18 19:49:36,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 19:49:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:36,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 19:49:36,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:36,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:36,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679952857] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:36,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:49:36,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2021-12-18 19:49:36,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103779753] [2021-12-18 19:49:36,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:36,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-18 19:49:36,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:36,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-18 19:49:36,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-12-18 19:49:36,593 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 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) [2021-12-18 19:49:36,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:36,670 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-12-18 19:49:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:49:36,670 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 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 [2021-12-18 19:49:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:36,670 INFO L225 Difference]: With dead ends: 34 [2021-12-18 19:49:36,670 INFO L226 Difference]: Without dead ends: 27 [2021-12-18 19:49:36,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-12-18 19:49:36,671 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:36,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 82 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:49:36,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-18 19:49:36,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-12-18 19:49:36,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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) [2021-12-18 19:49:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-12-18 19:49:36,673 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2021-12-18 19:49:36,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:36,673 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-12-18 19:49:36,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 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) [2021-12-18 19:49:36,673 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-12-18 19:49:36,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-18 19:49:36,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:36,673 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:36,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 19:49:36,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:36,874 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:36,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:36,874 INFO L85 PathProgramCache]: Analyzing trace with hash -309577815, now seen corresponding path program 2 times [2021-12-18 19:49:36,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:36,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164034841] [2021-12-18 19:49:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:36,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:36,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:36,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:36,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:36,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164034841] [2021-12-18 19:49:36,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164034841] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:36,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345572780] [2021-12-18 19:49:36,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:49:36,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:36,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:36,993 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) [2021-12-18 19:49:36,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 19:49:37,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:49:37,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:49:37,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-18 19:49:37,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:37,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:37,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 19:49:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:37,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345572780] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:37,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:49:37,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2021-12-18 19:49:37,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108475383] [2021-12-18 19:49:37,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:37,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 19:49:37,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:37,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 19:49:37,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-12-18 19:49:37,425 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:49:37,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:37,649 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-12-18 19:49:37,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 19:49:37,649 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-18 19:49:37,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:37,649 INFO L225 Difference]: With dead ends: 30 [2021-12-18 19:49:37,650 INFO L226 Difference]: Without dead ends: 30 [2021-12-18 19:49:37,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-12-18 19:49:37,650 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:37,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 110 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:49:37,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-18 19:49:37,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-12-18 19:49:37,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 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) [2021-12-18 19:49:37,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-12-18 19:49:37,652 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2021-12-18 19:49:37,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:37,652 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-12-18 19:49:37,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:49:37,652 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-12-18 19:49:37,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-18 19:49:37,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:37,652 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:37,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 19:49:37,853 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,SelfDestructingSolverStorable11 [2021-12-18 19:49:37,853 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:37,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:37,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1540133135, now seen corresponding path program 3 times [2021-12-18 19:49:37,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:37,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849989099] [2021-12-18 19:49:37,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:37,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:37,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:37,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849989099] [2021-12-18 19:49:37,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849989099] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:37,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540018825] [2021-12-18 19:49:37,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:49:37,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:37,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:37,984 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) [2021-12-18 19:49:37,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 19:49:38,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-18 19:49:38,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:49:38,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-18 19:49:38,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:38,225 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:38,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:38,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540018825] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:38,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:49:38,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2021-12-18 19:49:38,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101021691] [2021-12-18 19:49:38,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:38,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 19:49:38,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:38,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 19:49:38,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-12-18 19:49:38,419 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 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) [2021-12-18 19:49:38,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:38,544 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-12-18 19:49:38,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 19:49:38,544 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-18 19:49:38,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:38,545 INFO L225 Difference]: With dead ends: 48 [2021-12-18 19:49:38,545 INFO L226 Difference]: Without dead ends: 36 [2021-12-18 19:49:38,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-12-18 19:49:38,545 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:38,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 199 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:49:38,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-18 19:49:38,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-12-18 19:49:38,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 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) [2021-12-18 19:49:38,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-12-18 19:49:38,547 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2021-12-18 19:49:38,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:38,547 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-12-18 19:49:38,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 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) [2021-12-18 19:49:38,547 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-12-18 19:49:38,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 19:49:38,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:38,548 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:38,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 19:49:38,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:38,759 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:38,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:38,760 INFO L85 PathProgramCache]: Analyzing trace with hash 884722574, now seen corresponding path program 4 times [2021-12-18 19:49:38,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:38,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653103644] [2021-12-18 19:49:38,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:38,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:38,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:38,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653103644] [2021-12-18 19:49:38,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653103644] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:38,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645202978] [2021-12-18 19:49:38,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:49:38,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:38,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:38,916 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) [2021-12-18 19:49:38,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 19:49:38,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:49:38,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:49:38,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-18 19:49:38,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:39,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:39,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 19:49:39,303 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:39,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645202978] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:39,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:49:39,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2021-12-18 19:49:39,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204485864] [2021-12-18 19:49:39,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:39,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-18 19:49:39,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:39,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-18 19:49:39,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-12-18 19:49:39,305 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 26 states, 25 states have (on average 2.72) internal successors, (68), 26 states have internal predecessors, (68), 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) [2021-12-18 19:49:39,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:39,599 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-12-18 19:49:39,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 19:49:39,600 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.72) internal successors, (68), 26 states have internal predecessors, (68), 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 32 [2021-12-18 19:49:39,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:39,600 INFO L225 Difference]: With dead ends: 39 [2021-12-18 19:49:39,600 INFO L226 Difference]: Without dead ends: 39 [2021-12-18 19:49:39,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 19:49:39,601 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 158 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:39,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 157 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:49:39,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-18 19:49:39,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-12-18 19:49:39,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 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) [2021-12-18 19:49:39,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-12-18 19:49:39,603 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 32 [2021-12-18 19:49:39,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:39,603 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-12-18 19:49:39,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.72) internal successors, (68), 26 states have internal predecessors, (68), 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) [2021-12-18 19:49:39,603 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-12-18 19:49:39,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-18 19:49:39,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:39,604 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:39,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-18 19:49:39,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:39,811 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:39,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:39,812 INFO L85 PathProgramCache]: Analyzing trace with hash -510819796, now seen corresponding path program 5 times [2021-12-18 19:49:39,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:39,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148809311] [2021-12-18 19:49:39,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:39,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:39,950 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:39,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:39,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148809311] [2021-12-18 19:49:39,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148809311] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:39,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619295728] [2021-12-18 19:49:39,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:49:39,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:39,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:39,952 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) [2021-12-18 19:49:39,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 19:49:40,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-18 19:49:40,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:49:40,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 19:49:40,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:40,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:40,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619295728] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:40,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:49:40,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-12-18 19:49:40,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884279615] [2021-12-18 19:49:40,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:40,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 19:49:40,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:40,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 19:49:40,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-12-18 19:49:40,494 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 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) [2021-12-18 19:49:40,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:40,706 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2021-12-18 19:49:40,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 19:49:40,706 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 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 37 [2021-12-18 19:49:40,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:40,707 INFO L225 Difference]: With dead ends: 62 [2021-12-18 19:49:40,707 INFO L226 Difference]: Without dead ends: 45 [2021-12-18 19:49:40,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:49:40,708 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 41 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:40,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 333 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:49:40,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-18 19:49:40,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-12-18 19:49:40,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 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) [2021-12-18 19:49:40,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-12-18 19:49:40,710 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2021-12-18 19:49:40,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:40,710 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-12-18 19:49:40,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 24 states have internal predecessors, (74), 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) [2021-12-18 19:49:40,710 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-12-18 19:49:40,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 19:49:40,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:40,710 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:40,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 19:49:40,917 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,SelfDestructingSolverStorable14 [2021-12-18 19:49:40,918 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:40,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:40,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1615395281, now seen corresponding path program 6 times [2021-12-18 19:49:40,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:40,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988537676] [2021-12-18 19:49:40,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:40,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:41,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:41,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988537676] [2021-12-18 19:49:41,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988537676] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:41,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309885879] [2021-12-18 19:49:41,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:49:41,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:41,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:41,061 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) [2021-12-18 19:49:41,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 19:49:41,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-18 19:49:41,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:49:41,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 19:49:41,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:41,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:49:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:41,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:41,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309885879] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:41,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:49:41,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2021-12-18 19:49:41,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819901475] [2021-12-18 19:49:41,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:41,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-18 19:49:41,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:41,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-18 19:49:41,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-12-18 19:49:41,743 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 32 states, 31 states have (on average 3.225806451612903) internal successors, (100), 32 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) [2021-12-18 19:49:42,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:42,040 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-12-18 19:49:42,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 19:49:42,040 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.225806451612903) internal successors, (100), 32 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) Word has length 41 [2021-12-18 19:49:42,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:42,040 INFO L225 Difference]: With dead ends: 48 [2021-12-18 19:49:42,040 INFO L226 Difference]: Without dead ends: 48 [2021-12-18 19:49:42,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 19:49:42,041 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 117 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:42,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 201 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:49:42,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-18 19:49:42,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-12-18 19:49:42,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 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) [2021-12-18 19:49:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-12-18 19:49:42,043 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 41 [2021-12-18 19:49:42,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:42,043 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-12-18 19:49:42,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.225806451612903) internal successors, (100), 32 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) [2021-12-18 19:49:42,043 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-12-18 19:49:42,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 19:49:42,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:42,044 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:42,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 19:49:42,244 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,SelfDestructingSolverStorable15 [2021-12-18 19:49:42,245 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:42,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:42,245 INFO L85 PathProgramCache]: Analyzing trace with hash 658687019, now seen corresponding path program 7 times [2021-12-18 19:49:42,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:42,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326372773] [2021-12-18 19:49:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:42,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:42,379 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:42,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:42,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326372773] [2021-12-18 19:49:42,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326372773] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:42,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905331475] [2021-12-18 19:49:42,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:49:42,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:42,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:42,381 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) [2021-12-18 19:49:42,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 19:49:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:42,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 19:49:42,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:42,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:42,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905331475] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:42,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:49:42,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2021-12-18 19:49:42,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959674226] [2021-12-18 19:49:42,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:42,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-18 19:49:42,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:42,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-18 19:49:42,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-12-18 19:49:42,904 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 28 states have internal predecessors, (92), 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) [2021-12-18 19:49:43,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:43,170 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2021-12-18 19:49:43,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 19:49:43,170 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 28 states have internal predecessors, (92), 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 46 [2021-12-18 19:49:43,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:43,170 INFO L225 Difference]: With dead ends: 76 [2021-12-18 19:49:43,170 INFO L226 Difference]: Without dead ends: 54 [2021-12-18 19:49:43,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 19:49:43,171 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 68 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:43,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 426 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:49:43,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-18 19:49:43,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2021-12-18 19:49:43,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:49:43,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-12-18 19:49:43,173 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 46 [2021-12-18 19:49:43,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:43,173 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-12-18 19:49:43,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 28 states have internal predecessors, (92), 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) [2021-12-18 19:49:43,174 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-12-18 19:49:43,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-18 19:49:43,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:43,174 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:43,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 19:49:43,383 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,SelfDestructingSolverStorable16 [2021-12-18 19:49:43,383 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:43,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:43,384 INFO L85 PathProgramCache]: Analyzing trace with hash 40506248, now seen corresponding path program 8 times [2021-12-18 19:49:43,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:43,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75544525] [2021-12-18 19:49:43,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:43,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:43,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:43,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75544525] [2021-12-18 19:49:43,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75544525] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:43,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768091184] [2021-12-18 19:49:43,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:49:43,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:43,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:43,559 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) [2021-12-18 19:49:43,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 19:49:43,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:49:43,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:49:43,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-18 19:49:43,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:43,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:44,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 19:49:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:44,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768091184] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:44,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:49:44,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-18 19:49:44,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048278007] [2021-12-18 19:49:44,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:44,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-18 19:49:44,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:44,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-18 19:49:44,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-12-18 19:49:44,133 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 34 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 34 states have internal predecessors, (104), 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) [2021-12-18 19:49:44,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:44,569 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-12-18 19:49:44,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 19:49:44,570 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 34 states have internal predecessors, (104), 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 50 [2021-12-18 19:49:44,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:44,570 INFO L225 Difference]: With dead ends: 57 [2021-12-18 19:49:44,570 INFO L226 Difference]: Without dead ends: 57 [2021-12-18 19:49:44,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=427, Invalid=1735, Unknown=0, NotChecked=0, Total=2162 [2021-12-18 19:49:44,571 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 169 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:44,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 309 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:49:44,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-18 19:49:44,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-12-18 19:49:44,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:49:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-12-18 19:49:44,573 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 50 [2021-12-18 19:49:44,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:44,573 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-12-18 19:49:44,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 34 states have internal predecessors, (104), 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) [2021-12-18 19:49:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-12-18 19:49:44,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-18 19:49:44,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:44,574 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:44,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 19:49:44,787 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,SelfDestructingSolverStorable17 [2021-12-18 19:49:44,787 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:44,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:44,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1129260658, now seen corresponding path program 9 times [2021-12-18 19:49:44,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:44,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748548746] [2021-12-18 19:49:44,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:44,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:44,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:44,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748548746] [2021-12-18 19:49:44,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748548746] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:44,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404126876] [2021-12-18 19:49:44,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:49:44,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:44,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:45,020 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) [2021-12-18 19:49:45,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 19:49:45,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-18 19:49:45,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:49:45,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 19:49:45,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:45,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:45,807 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:45,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404126876] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:45,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:49:45,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2021-12-18 19:49:45,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049979347] [2021-12-18 19:49:45,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:45,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-18 19:49:45,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:45,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-18 19:49:45,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-12-18 19:49:45,810 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 32 states, 32 states have (on average 3.4375) internal successors, (110), 32 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) [2021-12-18 19:49:46,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:46,195 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2021-12-18 19:49:46,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 19:49:46,195 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.4375) internal successors, (110), 32 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) Word has length 55 [2021-12-18 19:49:46,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:46,196 INFO L225 Difference]: With dead ends: 90 [2021-12-18 19:49:46,196 INFO L226 Difference]: Without dead ends: 63 [2021-12-18 19:49:46,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 19:49:46,196 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 88 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:46,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 590 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:49:46,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-18 19:49:46,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2021-12-18 19:49:46,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 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) [2021-12-18 19:49:46,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-12-18 19:49:46,202 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 55 [2021-12-18 19:49:46,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:46,202 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-12-18 19:49:46,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.4375) internal successors, (110), 32 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) [2021-12-18 19:49:46,203 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-12-18 19:49:46,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-18 19:49:46,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:46,203 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:46,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-18 19:49:46,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:46,404 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:46,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:46,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1822347189, now seen corresponding path program 10 times [2021-12-18 19:49:46,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:46,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014435533] [2021-12-18 19:49:46,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:46,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 28 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:46,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:46,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014435533] [2021-12-18 19:49:46,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014435533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:46,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997774479] [2021-12-18 19:49:46,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:49:46,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:46,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:46,626 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) [2021-12-18 19:49:46,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 19:49:46,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:49:46,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:49:46,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-18 19:49:46,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 50 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:46,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:47,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 19:49:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 50 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:47,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997774479] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:47,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:49:47,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 37 [2021-12-18 19:49:47,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070974728] [2021-12-18 19:49:47,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:47,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-18 19:49:47,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:47,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-18 19:49:47,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2021-12-18 19:49:47,295 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 38 states, 37 states have (on average 3.2972972972972974) internal successors, (122), 38 states have internal predecessors, (122), 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) [2021-12-18 19:49:47,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:47,785 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-12-18 19:49:47,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 19:49:47,786 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.2972972972972974) internal successors, (122), 38 states have internal predecessors, (122), 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 59 [2021-12-18 19:49:47,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:47,786 INFO L225 Difference]: With dead ends: 66 [2021-12-18 19:49:47,786 INFO L226 Difference]: Without dead ends: 66 [2021-12-18 19:49:47,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=541, Invalid=2215, Unknown=0, NotChecked=0, Total=2756 [2021-12-18 19:49:47,787 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 256 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:47,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 348 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:49:47,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-18 19:49:47,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-12-18 19:49:47,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 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) [2021-12-18 19:49:47,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-12-18 19:49:47,789 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 59 [2021-12-18 19:49:47,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:47,789 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-12-18 19:49:47,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.2972972972972974) internal successors, (122), 38 states have internal predecessors, (122), 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) [2021-12-18 19:49:47,789 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-12-18 19:49:47,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-18 19:49:47,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:47,790 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:47,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 19:49:47,990 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,SelfDestructingSolverStorable19 [2021-12-18 19:49:47,990 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:47,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:47,991 INFO L85 PathProgramCache]: Analyzing trace with hash 897187429, now seen corresponding path program 11 times [2021-12-18 19:49:47,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:47,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312730728] [2021-12-18 19:49:47,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:47,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 12 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:48,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:48,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312730728] [2021-12-18 19:49:48,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312730728] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:48,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062190071] [2021-12-18 19:49:48,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:49:48,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:48,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:48,256 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) [2021-12-18 19:49:48,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 19:49:48,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-18 19:49:48,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:49:48,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-18 19:49:48,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 12 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:48,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 12 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:49,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062190071] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:49,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:49:49,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2021-12-18 19:49:49,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34010623] [2021-12-18 19:49:49,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:49,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-18 19:49:49,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:49,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-18 19:49:49,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 19:49:49,272 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 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) [2021-12-18 19:49:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:49,789 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2021-12-18 19:49:49,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 19:49:49,789 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 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 64 [2021-12-18 19:49:49,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:49,790 INFO L225 Difference]: With dead ends: 104 [2021-12-18 19:49:49,790 INFO L226 Difference]: Without dead ends: 72 [2021-12-18 19:49:49,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=2149, Unknown=0, NotChecked=0, Total=2352 [2021-12-18 19:49:49,791 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 77 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:49,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 918 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:49:49,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-18 19:49:49,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-12-18 19:49:49,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 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) [2021-12-18 19:49:49,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-12-18 19:49:49,793 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 64 [2021-12-18 19:49:49,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:49,793 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-12-18 19:49:49,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 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) [2021-12-18 19:49:49,793 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-12-18 19:49:49,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-18 19:49:49,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:49,793 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:49,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-18 19:49:49,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:49,998 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:49,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:49,998 INFO L85 PathProgramCache]: Analyzing trace with hash 2146504834, now seen corresponding path program 12 times [2021-12-18 19:49:49,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:49,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162629429] [2021-12-18 19:49:49,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:49,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 45 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:50,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:50,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162629429] [2021-12-18 19:49:50,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162629429] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:50,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236441634] [2021-12-18 19:49:50,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:49:50,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:50,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:50,284 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) [2021-12-18 19:49:50,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 19:49:50,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-18 19:49:50,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:49:50,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-18 19:49:50,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:50,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:49:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 66 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:50,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 91 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:51,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236441634] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:51,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:49:51,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2021-12-18 19:49:51,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954078001] [2021-12-18 19:49:51,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:51,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-18 19:49:51,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:51,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-18 19:49:51,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2697, Unknown=0, NotChecked=0, Total=3080 [2021-12-18 19:49:51,505 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 56 states, 55 states have (on average 3.5636363636363635) internal successors, (196), 56 states have internal predecessors, (196), 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) [2021-12-18 19:49:52,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:52,122 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-12-18 19:49:52,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 19:49:52,122 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 3.5636363636363635) internal successors, (196), 56 states have internal predecessors, (196), 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 68 [2021-12-18 19:49:52,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:52,123 INFO L225 Difference]: With dead ends: 75 [2021-12-18 19:49:52,123 INFO L226 Difference]: Without dead ends: 75 [2021-12-18 19:49:52,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1045, Invalid=4211, Unknown=0, NotChecked=0, Total=5256 [2021-12-18 19:49:52,125 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 312 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:52,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 501 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:49:52,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-18 19:49:52,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-12-18 19:49:52,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 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) [2021-12-18 19:49:52,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-12-18 19:49:52,138 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 68 [2021-12-18 19:49:52,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:52,138 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-12-18 19:49:52,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 3.5636363636363635) internal successors, (196), 56 states have internal predecessors, (196), 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) [2021-12-18 19:49:52,139 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-12-18 19:49:52,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-18 19:49:52,143 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:52,144 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:52,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-18 19:49:52,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:52,360 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:52,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:52,360 INFO L85 PathProgramCache]: Analyzing trace with hash -111069768, now seen corresponding path program 13 times [2021-12-18 19:49:52,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:52,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120215696] [2021-12-18 19:49:52,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:52,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 14 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:52,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:52,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120215696] [2021-12-18 19:49:52,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120215696] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:52,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254526746] [2021-12-18 19:49:52,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:49:52,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:52,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:52,622 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) [2021-12-18 19:49:52,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 19:49:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:52,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-18 19:49:52,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 14 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:52,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 14 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:53,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254526746] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:53,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:49:53,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 40 [2021-12-18 19:49:53,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367101020] [2021-12-18 19:49:53,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:53,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-18 19:49:53,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:53,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-18 19:49:53,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1450, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 19:49:53,532 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 40 states, 40 states have (on average 3.65) internal successors, (146), 40 states have internal predecessors, (146), 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) [2021-12-18 19:49:54,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:54,131 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2021-12-18 19:49:54,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 19:49:54,131 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.65) internal successors, (146), 40 states have internal predecessors, (146), 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 73 [2021-12-18 19:49:54,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:54,132 INFO L225 Difference]: With dead ends: 118 [2021-12-18 19:49:54,132 INFO L226 Difference]: Without dead ends: 81 [2021-12-18 19:49:54,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=228, Invalid=2742, Unknown=0, NotChecked=0, Total=2970 [2021-12-18 19:49:54,136 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 84 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:54,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 1062 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:49:54,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-18 19:49:54,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-12-18 19:49:54,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 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) [2021-12-18 19:49:54,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-12-18 19:49:54,139 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 73 [2021-12-18 19:49:54,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:54,140 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-12-18 19:49:54,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.65) internal successors, (146), 40 states have internal predecessors, (146), 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) [2021-12-18 19:49:54,140 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-12-18 19:49:54,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-18 19:49:54,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:54,140 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:54,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-18 19:49:54,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-18 19:49:54,357 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:54,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:54,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1527788603, now seen corresponding path program 14 times [2021-12-18 19:49:54,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:54,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522418792] [2021-12-18 19:49:54,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:54,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 66 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:54,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:54,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522418792] [2021-12-18 19:49:54,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522418792] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:54,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901456842] [2021-12-18 19:49:54,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:49:54,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:54,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:54,650 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) [2021-12-18 19:49:54,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 19:49:54,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:49:54,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:49:54,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-18 19:49:54,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 98 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:55,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:55,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 19:49:55,509 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 98 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:55,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901456842] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:55,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:49:55,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 45 [2021-12-18 19:49:55,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486796367] [2021-12-18 19:49:55,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:55,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-18 19:49:55,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:55,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-18 19:49:55,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2021-12-18 19:49:55,510 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 states have internal predecessors, (158), 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) [2021-12-18 19:49:56,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:56,293 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2021-12-18 19:49:56,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 19:49:56,293 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 states have internal predecessors, (158), 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 77 [2021-12-18 19:49:56,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:56,294 INFO L225 Difference]: With dead ends: 84 [2021-12-18 19:49:56,294 INFO L226 Difference]: Without dead ends: 84 [2021-12-18 19:49:56,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1007, Invalid=4105, Unknown=0, NotChecked=0, Total=5112 [2021-12-18 19:49:56,295 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 363 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:56,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 521 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:49:56,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-18 19:49:56,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-12-18 19:49:56,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 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) [2021-12-18 19:49:56,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2021-12-18 19:49:56,297 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 77 [2021-12-18 19:49:56,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:56,298 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2021-12-18 19:49:56,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 states have internal predecessors, (158), 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) [2021-12-18 19:49:56,298 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2021-12-18 19:49:56,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-18 19:49:56,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:56,298 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:56,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-18 19:49:56,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:56,511 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:56,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:56,512 INFO L85 PathProgramCache]: Analyzing trace with hash 787512735, now seen corresponding path program 15 times [2021-12-18 19:49:56,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:56,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820829795] [2021-12-18 19:49:56,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:56,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 16 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:56,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:56,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820829795] [2021-12-18 19:49:56,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820829795] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:56,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738629580] [2021-12-18 19:49:56,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:49:56,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:56,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:56,772 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:49:56,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 19:49:57,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-18 19:49:57,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:49:57,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-18 19:49:57,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 16 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:57,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:49:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 16 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:58,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738629580] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:49:58,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:49:58,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 44 [2021-12-18 19:49:58,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993413331] [2021-12-18 19:49:58,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:49:58,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-18 19:49:58,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:49:58,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-18 19:49:58,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1772, Unknown=0, NotChecked=0, Total=1892 [2021-12-18 19:49:58,046 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 44 states, 44 states have (on average 3.727272727272727) internal successors, (164), 44 states have internal predecessors, (164), 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) [2021-12-18 19:49:58,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:49:58,656 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2021-12-18 19:49:58,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 19:49:58,656 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.727272727272727) internal successors, (164), 44 states have internal predecessors, (164), 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 82 [2021-12-18 19:49:58,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:49:58,657 INFO L225 Difference]: With dead ends: 132 [2021-12-18 19:49:58,657 INFO L226 Difference]: Without dead ends: 90 [2021-12-18 19:49:58,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=253, Invalid=3407, Unknown=0, NotChecked=0, Total=3660 [2021-12-18 19:49:58,658 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 165 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:49:58,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 1147 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:49:58,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-18 19:49:58,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2021-12-18 19:49:58,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 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) [2021-12-18 19:49:58,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-12-18 19:49:58,663 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2021-12-18 19:49:58,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:49:58,663 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-12-18 19:49:58,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.727272727272727) internal successors, (164), 44 states have internal predecessors, (164), 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) [2021-12-18 19:49:58,664 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-12-18 19:49:58,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-18 19:49:58,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:49:58,664 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:49:58,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-18 19:49:58,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:58,869 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:49:58,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:49:58,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1328274820, now seen corresponding path program 16 times [2021-12-18 19:49:58,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:49:58,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683969328] [2021-12-18 19:49:58,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:49:58,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:49:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:49:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 91 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:59,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:49:59,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683969328] [2021-12-18 19:49:59,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683969328] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:49:59,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708981477] [2021-12-18 19:49:59,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:49:59,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:49:59,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:49:59,144 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:49:59,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 19:49:59,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:49:59,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:49:59,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-18 19:49:59,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:49:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 128 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:49:59,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:00,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 19:50:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 128 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:00,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708981477] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:00,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:00,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 49 [2021-12-18 19:50:00,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985573033] [2021-12-18 19:50:00,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:00,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-18 19:50:00,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:00,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-18 19:50:00,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2176, Unknown=0, NotChecked=0, Total=2450 [2021-12-18 19:50:00,247 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 50 states, 49 states have (on average 3.5918367346938775) internal successors, (176), 50 states have internal predecessors, (176), 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) [2021-12-18 19:50:01,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:01,074 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2021-12-18 19:50:01,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-18 19:50:01,075 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.5918367346938775) internal successors, (176), 50 states have internal predecessors, (176), 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 86 [2021-12-18 19:50:01,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:01,075 INFO L225 Difference]: With dead ends: 93 [2021-12-18 19:50:01,075 INFO L226 Difference]: Without dead ends: 93 [2021-12-18 19:50:01,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=967, Invalid=4003, Unknown=0, NotChecked=0, Total=4970 [2021-12-18 19:50:01,077 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 355 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:01,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 613 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:50:01,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-18 19:50:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-12-18 19:50:01,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.032967032967033) internal successors, (94), 91 states have internal predecessors, (94), 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) [2021-12-18 19:50:01,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2021-12-18 19:50:01,078 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 86 [2021-12-18 19:50:01,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:01,078 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2021-12-18 19:50:01,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.5918367346938775) internal successors, (176), 50 states have internal predecessors, (176), 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) [2021-12-18 19:50:01,078 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2021-12-18 19:50:01,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-18 19:50:01,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:01,079 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:01,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-18 19:50:01,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:01,287 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:50:01,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:01,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1956884482, now seen corresponding path program 17 times [2021-12-18 19:50:01,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:01,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351628668] [2021-12-18 19:50:01,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:01,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 18 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:01,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:01,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351628668] [2021-12-18 19:50:01,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351628668] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:01,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135968893] [2021-12-18 19:50:01,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:50:01,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:01,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:01,628 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:50:01,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 19:50:02,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-18 19:50:02,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:02,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-18 19:50:02,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 18 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:02,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 18 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:03,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135968893] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:03,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:03,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2021-12-18 19:50:03,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050011794] [2021-12-18 19:50:03,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:03,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-18 19:50:03,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:03,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-18 19:50:03,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2126, Unknown=0, NotChecked=0, Total=2256 [2021-12-18 19:50:03,330 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 48 states, 48 states have (on average 3.7916666666666665) internal successors, (182), 48 states have internal predecessors, (182), 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) [2021-12-18 19:50:04,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:04,300 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2021-12-18 19:50:04,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 19:50:04,300 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.7916666666666665) internal successors, (182), 48 states have internal predecessors, (182), 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 91 [2021-12-18 19:50:04,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:04,300 INFO L225 Difference]: With dead ends: 146 [2021-12-18 19:50:04,300 INFO L226 Difference]: Without dead ends: 99 [2021-12-18 19:50:04,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 154 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=278, Invalid=4144, Unknown=0, NotChecked=0, Total=4422 [2021-12-18 19:50:04,301 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 138 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:04,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 1616 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1364 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 19:50:04,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-18 19:50:04,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2021-12-18 19:50:04,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 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) [2021-12-18 19:50:04,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-12-18 19:50:04,302 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 91 [2021-12-18 19:50:04,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:04,303 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-12-18 19:50:04,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.7916666666666665) internal successors, (182), 48 states have internal predecessors, (182), 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) [2021-12-18 19:50:04,303 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-12-18 19:50:04,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-18 19:50:04,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:04,303 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:04,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-18 19:50:04,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-18 19:50:04,509 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:50:04,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:04,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1756877761, now seen corresponding path program 18 times [2021-12-18 19:50:04,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:04,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472504936] [2021-12-18 19:50:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:04,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:04,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 120 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:04,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:04,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472504936] [2021-12-18 19:50:04,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472504936] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:04,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794938367] [2021-12-18 19:50:04,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:50:04,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:04,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:04,864 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:50:04,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-18 19:50:05,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-18 19:50:05,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:05,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-18 19:50:05,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:05,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:50:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 153 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:05,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 190 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:06,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794938367] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:06,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:06,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 73 [2021-12-18 19:50:06,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508617930] [2021-12-18 19:50:06,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:06,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-18 19:50:06,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:06,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-18 19:50:06,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=4722, Unknown=0, NotChecked=0, Total=5402 [2021-12-18 19:50:06,851 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 74 states, 73 states have (on average 3.7945205479452055) internal successors, (277), 74 states have internal predecessors, (277), 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) [2021-12-18 19:50:07,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:07,985 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2021-12-18 19:50:07,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 19:50:07,986 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 3.7945205479452055) internal successors, (277), 74 states have internal predecessors, (277), 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 95 [2021-12-18 19:50:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:07,987 INFO L225 Difference]: With dead ends: 102 [2021-12-18 19:50:07,987 INFO L226 Difference]: Without dead ends: 102 [2021-12-18 19:50:07,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2267 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1858, Invalid=7454, Unknown=0, NotChecked=0, Total=9312 [2021-12-18 19:50:07,987 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 420 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:07,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 570 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:50:07,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-18 19:50:07,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-12-18 19:50:07,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 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) [2021-12-18 19:50:07,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2021-12-18 19:50:07,989 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 95 [2021-12-18 19:50:07,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:07,989 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2021-12-18 19:50:07,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 3.7945205479452055) internal successors, (277), 74 states have internal predecessors, (277), 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) [2021-12-18 19:50:07,989 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2021-12-18 19:50:07,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-18 19:50:07,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:07,990 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:08,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-18 19:50:08,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-18 19:50:08,190 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:50:08,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:08,191 INFO L85 PathProgramCache]: Analyzing trace with hash -924999207, now seen corresponding path program 19 times [2021-12-18 19:50:08,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:08,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301921654] [2021-12-18 19:50:08,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:08,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 20 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:08,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:08,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301921654] [2021-12-18 19:50:08,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301921654] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:08,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76752854] [2021-12-18 19:50:08,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:50:08,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:08,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:08,637 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:50:08,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-18 19:50:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:08,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-18 19:50:08,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 20 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:09,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:10,045 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 20 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:10,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76752854] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:10,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:10,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2021-12-18 19:50:10,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643312029] [2021-12-18 19:50:10,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:10,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-18 19:50:10,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:10,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-18 19:50:10,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2512, Unknown=0, NotChecked=0, Total=2652 [2021-12-18 19:50:10,052 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 52 states, 52 states have (on average 3.8461538461538463) internal successors, (200), 52 states have internal predecessors, (200), 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) [2021-12-18 19:50:11,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:11,110 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2021-12-18 19:50:11,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-18 19:50:11,110 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.8461538461538463) internal successors, (200), 52 states have internal predecessors, (200), 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 100 [2021-12-18 19:50:11,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:11,110 INFO L225 Difference]: With dead ends: 160 [2021-12-18 19:50:11,110 INFO L226 Difference]: Without dead ends: 108 [2021-12-18 19:50:11,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 171 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=303, Invalid=4953, Unknown=0, NotChecked=0, Total=5256 [2021-12-18 19:50:11,111 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 160 mSDsluCounter, 1836 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:11,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 1892 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 19:50:11,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-18 19:50:11,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2021-12-18 19:50:11,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 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) [2021-12-18 19:50:11,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2021-12-18 19:50:11,113 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2021-12-18 19:50:11,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:11,113 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2021-12-18 19:50:11,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.8461538461538463) internal successors, (200), 52 states have internal predecessors, (200), 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) [2021-12-18 19:50:11,113 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2021-12-18 19:50:11,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-18 19:50:11,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:11,114 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:11,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-18 19:50:11,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-18 19:50:11,321 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:50:11,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:11,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1790355830, now seen corresponding path program 20 times [2021-12-18 19:50:11,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:11,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315050147] [2021-12-18 19:50:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:11,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:11,744 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 153 proven. 323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:11,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:11,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315050147] [2021-12-18 19:50:11,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315050147] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:11,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583398335] [2021-12-18 19:50:11,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:50:11,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:11,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:11,756 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:50:11,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-18 19:50:11,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:50:11,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:11,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 112 conjunts are in the unsatisfiable core [2021-12-18 19:50:11,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:11,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:50:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 190 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:12,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 231 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:14,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583398335] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:14,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:14,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 79 [2021-12-18 19:50:14,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357136755] [2021-12-18 19:50:14,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:14,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-18 19:50:14,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:14,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-18 19:50:14,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=5618, Unknown=0, NotChecked=0, Total=6320 [2021-12-18 19:50:14,002 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 80 states, 79 states have (on average 3.848101265822785) internal successors, (304), 80 states have internal predecessors, (304), 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) [2021-12-18 19:50:15,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:15,063 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2021-12-18 19:50:15,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-18 19:50:15,063 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 3.848101265822785) internal successors, (304), 80 states have internal predecessors, (304), 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 104 [2021-12-18 19:50:15,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:15,064 INFO L225 Difference]: With dead ends: 111 [2021-12-18 19:50:15,064 INFO L226 Difference]: Without dead ends: 111 [2021-12-18 19:50:15,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2922 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1949, Invalid=8971, Unknown=0, NotChecked=0, Total=10920 [2021-12-18 19:50:15,065 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 426 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:15,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 910 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 19:50:15,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-18 19:50:15,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2021-12-18 19:50:15,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0275229357798166) internal successors, (112), 109 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) [2021-12-18 19:50:15,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2021-12-18 19:50:15,067 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 104 [2021-12-18 19:50:15,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:15,067 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2021-12-18 19:50:15,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 3.848101265822785) internal successors, (304), 80 states have internal predecessors, (304), 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) [2021-12-18 19:50:15,067 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2021-12-18 19:50:15,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-18 19:50:15,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:15,068 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:15,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-18 19:50:15,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:15,275 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:50:15,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:15,276 INFO L85 PathProgramCache]: Analyzing trace with hash 45684036, now seen corresponding path program 21 times [2021-12-18 19:50:15,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:15,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846721104] [2021-12-18 19:50:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:15,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 22 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:15,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:15,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846721104] [2021-12-18 19:50:15,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846721104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:15,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755905382] [2021-12-18 19:50:15,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:50:15,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:15,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:15,628 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:50:15,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-18 19:50:16,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-18 19:50:16,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:16,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-18 19:50:16,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 22 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:16,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 22 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:17,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755905382] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:17,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:17,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 56 [2021-12-18 19:50:17,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433674302] [2021-12-18 19:50:17,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:17,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-18 19:50:17,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:17,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-18 19:50:17,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2930, Unknown=0, NotChecked=0, Total=3080 [2021-12-18 19:50:17,772 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 56 states, 56 states have (on average 3.892857142857143) internal successors, (218), 56 states have internal predecessors, (218), 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) [2021-12-18 19:50:19,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:19,052 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2021-12-18 19:50:19,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-18 19:50:19,052 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.892857142857143) internal successors, (218), 56 states have internal predecessors, (218), 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 109 [2021-12-18 19:50:19,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:19,053 INFO L225 Difference]: With dead ends: 174 [2021-12-18 19:50:19,053 INFO L226 Difference]: Without dead ends: 117 [2021-12-18 19:50:19,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=328, Invalid=5834, Unknown=0, NotChecked=0, Total=6162 [2021-12-18 19:50:19,053 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 174 mSDsluCounter, 1971 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 2032 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:19,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 2032 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1724 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 19:50:19,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-18 19:50:19,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2021-12-18 19:50:19,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 113 states have internal predecessors, (116), 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) [2021-12-18 19:50:19,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2021-12-18 19:50:19,055 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 109 [2021-12-18 19:50:19,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:19,055 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2021-12-18 19:50:19,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.892857142857143) internal successors, (218), 56 states have internal predecessors, (218), 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) [2021-12-18 19:50:19,055 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2021-12-18 19:50:19,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-18 19:50:19,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:19,056 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:19,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-18 19:50:19,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:19,262 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:50:19,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:19,263 INFO L85 PathProgramCache]: Analyzing trace with hash 941772359, now seen corresponding path program 22 times [2021-12-18 19:50:19,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:19,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148094957] [2021-12-18 19:50:19,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:19,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 190 proven. 383 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:19,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:19,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148094957] [2021-12-18 19:50:19,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148094957] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:19,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493941466] [2021-12-18 19:50:19,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:50:19,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:19,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:19,630 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:50:19,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-18 19:50:19,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:50:19,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:19,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-18 19:50:19,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 242 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:20,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:20,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 19:50:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 242 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:20,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493941466] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:20,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:20,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 61 [2021-12-18 19:50:20,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301004710] [2021-12-18 19:50:20,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:20,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-18 19:50:20,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:20,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-18 19:50:20,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=3435, Unknown=0, NotChecked=0, Total=3782 [2021-12-18 19:50:20,953 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand has 62 states, 61 states have (on average 3.7704918032786887) internal successors, (230), 62 states have internal predecessors, (230), 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) [2021-12-18 19:50:22,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:22,137 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2021-12-18 19:50:22,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-18 19:50:22,138 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 3.7704918032786887) internal successors, (230), 62 states have internal predecessors, (230), 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 113 [2021-12-18 19:50:22,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:22,138 INFO L225 Difference]: With dead ends: 120 [2021-12-18 19:50:22,138 INFO L226 Difference]: Without dead ends: 120 [2021-12-18 19:50:22,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1959, Invalid=7941, Unknown=0, NotChecked=0, Total=9900 [2021-12-18 19:50:22,141 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 568 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:22,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 914 Invalid, 1501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:50:22,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-18 19:50:22,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-12-18 19:50:22,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 118 states have internal predecessors, (121), 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) [2021-12-18 19:50:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2021-12-18 19:50:22,152 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 113 [2021-12-18 19:50:22,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:22,156 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2021-12-18 19:50:22,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 3.7704918032786887) internal successors, (230), 62 states have internal predecessors, (230), 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) [2021-12-18 19:50:22,167 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2021-12-18 19:50:22,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-18 19:50:22,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:22,168 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:22,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-18 19:50:22,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-18 19:50:22,388 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:50:22,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:22,388 INFO L85 PathProgramCache]: Analyzing trace with hash 530107155, now seen corresponding path program 23 times [2021-12-18 19:50:22,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:22,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488673385] [2021-12-18 19:50:22,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:22,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 24 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:22,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:22,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488673385] [2021-12-18 19:50:22,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488673385] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:22,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010473771] [2021-12-18 19:50:22,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:50:22,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:22,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:22,740 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:50:22,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-18 19:50:23,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-18 19:50:23,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:23,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-18 19:50:23,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 24 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:23,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 24 proven. 606 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:24,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010473771] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:24,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:24,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 60 [2021-12-18 19:50:24,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984021726] [2021-12-18 19:50:24,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:24,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-18 19:50:24,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:24,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-18 19:50:24,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3380, Unknown=0, NotChecked=0, Total=3540 [2021-12-18 19:50:24,626 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 60 states, 60 states have (on average 3.933333333333333) internal successors, (236), 60 states have internal predecessors, (236), 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) [2021-12-18 19:50:25,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:25,748 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2021-12-18 19:50:25,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-18 19:50:25,748 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.933333333333333) internal successors, (236), 60 states have internal predecessors, (236), 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 118 [2021-12-18 19:50:25,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:25,749 INFO L225 Difference]: With dead ends: 188 [2021-12-18 19:50:25,749 INFO L226 Difference]: Without dead ends: 126 [2021-12-18 19:50:25,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 203 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=353, Invalid=6787, Unknown=0, NotChecked=0, Total=7140 [2021-12-18 19:50:25,750 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 235 mSDsluCounter, 2399 mSDsCounter, 0 mSdLazyCounter, 2072 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 2465 SdHoareTripleChecker+Invalid, 2135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:25,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 2465 Invalid, 2135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2072 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 19:50:25,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-18 19:50:25,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2021-12-18 19:50:25,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:50:25,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2021-12-18 19:50:25,752 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 118 [2021-12-18 19:50:25,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:25,752 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2021-12-18 19:50:25,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.933333333333333) internal successors, (236), 60 states have internal predecessors, (236), 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) [2021-12-18 19:50:25,752 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2021-12-18 19:50:25,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-18 19:50:25,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:25,753 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:25,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-18 19:50:25,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-18 19:50:25,971 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:50:25,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:25,971 INFO L85 PathProgramCache]: Analyzing trace with hash 660342128, now seen corresponding path program 24 times [2021-12-18 19:50:25,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:25,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994551593] [2021-12-18 19:50:25,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:25,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 231 proven. 448 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:26,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:26,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994551593] [2021-12-18 19:50:26,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994551593] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:26,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787992208] [2021-12-18 19:50:26,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:50:26,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:26,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:26,457 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:50:26,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-18 19:50:27,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-18 19:50:27,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:27,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-18 19:50:27,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:27,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:50:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 288 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:28,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 288 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:29,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787992208] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:29,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:29,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 91 [2021-12-18 19:50:29,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795794576] [2021-12-18 19:50:29,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:29,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-18 19:50:29,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:29,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-18 19:50:29,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=939, Invalid=7433, Unknown=0, NotChecked=0, Total=8372 [2021-12-18 19:50:29,647 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand has 92 states, 91 states have (on average 3.934065934065934) internal successors, (358), 92 states have internal predecessors, (358), 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) [2021-12-18 19:50:31,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:31,141 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2021-12-18 19:50:31,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-18 19:50:31,141 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 3.934065934065934) internal successors, (358), 92 states have internal predecessors, (358), 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 122 [2021-12-18 19:50:31,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:31,142 INFO L225 Difference]: With dead ends: 129 [2021-12-18 19:50:31,142 INFO L226 Difference]: Without dead ends: 129 [2021-12-18 19:50:31,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3347 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3473, Invalid=14083, Unknown=0, NotChecked=0, Total=17556 [2021-12-18 19:50:31,147 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 522 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:31,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 907 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1343 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:50:31,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-18 19:50:31,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2021-12-18 19:50:31,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 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) [2021-12-18 19:50:31,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2021-12-18 19:50:31,161 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 122 [2021-12-18 19:50:31,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:31,161 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2021-12-18 19:50:31,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 3.934065934065934) internal successors, (358), 92 states have internal predecessors, (358), 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) [2021-12-18 19:50:31,161 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2021-12-18 19:50:31,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-18 19:50:31,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:31,165 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:31,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-18 19:50:31,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:31,383 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:50:31,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:31,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1490036106, now seen corresponding path program 25 times [2021-12-18 19:50:31,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:31,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927468850] [2021-12-18 19:50:31,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:31,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 26 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:31,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:31,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927468850] [2021-12-18 19:50:31,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927468850] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:31,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447093403] [2021-12-18 19:50:31,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:50:31,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:31,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:31,913 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:50:31,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-18 19:50:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:32,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-18 19:50:32,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 26 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:32,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 26 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:33,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447093403] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:33,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:33,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 64 [2021-12-18 19:50:33,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613056783] [2021-12-18 19:50:33,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:33,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-18 19:50:33,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:33,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-18 19:50:33,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3862, Unknown=0, NotChecked=0, Total=4032 [2021-12-18 19:50:33,403 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 64 states, 64 states have (on average 3.96875) internal successors, (254), 64 states have internal predecessors, (254), 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) [2021-12-18 19:50:34,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:34,679 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2021-12-18 19:50:34,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-18 19:50:34,700 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.96875) internal successors, (254), 64 states have internal predecessors, (254), 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 127 [2021-12-18 19:50:34,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:34,701 INFO L225 Difference]: With dead ends: 202 [2021-12-18 19:50:34,701 INFO L226 Difference]: Without dead ends: 135 [2021-12-18 19:50:34,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 219 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=378, Invalid=7812, Unknown=0, NotChecked=0, Total=8190 [2021-12-18 19:50:34,702 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 146 mSDsluCounter, 2966 mSDsCounter, 0 mSdLazyCounter, 2589 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 3037 SdHoareTripleChecker+Invalid, 2631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:34,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 3037 Invalid, 2631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2589 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 19:50:34,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-18 19:50:34,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2021-12-18 19:50:34,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 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) [2021-12-18 19:50:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2021-12-18 19:50:34,706 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 127 [2021-12-18 19:50:34,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:34,707 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2021-12-18 19:50:34,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.96875) internal successors, (254), 64 states have internal predecessors, (254), 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) [2021-12-18 19:50:34,707 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2021-12-18 19:50:34,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-18 19:50:34,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:34,707 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:34,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-18 19:50:34,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:34,908 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:50:34,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:34,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1094958131, now seen corresponding path program 26 times [2021-12-18 19:50:34,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:34,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483244523] [2021-12-18 19:50:34,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:34,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 276 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:35,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:35,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483244523] [2021-12-18 19:50:35,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483244523] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:35,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752107321] [2021-12-18 19:50:35,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:50:35,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:35,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:35,426 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:50:35,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-18 19:50:35,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:50:35,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:35,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 135 conjunts are in the unsatisfiable core [2021-12-18 19:50:35,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 338 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:36,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:37,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 19:50:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 338 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:37,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752107321] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:37,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:37,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 69 [2021-12-18 19:50:37,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440974648] [2021-12-18 19:50:37,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:37,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-18 19:50:37,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:37,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-18 19:50:37,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=4390, Unknown=0, NotChecked=0, Total=4830 [2021-12-18 19:50:37,280 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 70 states, 69 states have (on average 3.8550724637681157) internal successors, (266), 70 states have internal predecessors, (266), 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) [2021-12-18 19:50:39,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:39,068 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2021-12-18 19:50:39,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-18 19:50:39,068 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.8550724637681157) internal successors, (266), 70 states have internal predecessors, (266), 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 131 [2021-12-18 19:50:39,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:39,069 INFO L225 Difference]: With dead ends: 138 [2021-12-18 19:50:39,069 INFO L226 Difference]: Without dead ends: 138 [2021-12-18 19:50:39,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2555, Invalid=10327, Unknown=0, NotChecked=0, Total=12882 [2021-12-18 19:50:39,070 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 524 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 1824 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:39,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 1221 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1824 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 19:50:39,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-18 19:50:39,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-12-18 19:50:39,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 136 states have internal predecessors, (139), 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) [2021-12-18 19:50:39,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2021-12-18 19:50:39,072 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 131 [2021-12-18 19:50:39,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:39,072 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2021-12-18 19:50:39,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.8550724637681157) internal successors, (266), 70 states have internal predecessors, (266), 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) [2021-12-18 19:50:39,072 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2021-12-18 19:50:39,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-18 19:50:39,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:39,073 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:39,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-18 19:50:39,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:39,278 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:50:39,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:39,279 INFO L85 PathProgramCache]: Analyzing trace with hash -929474227, now seen corresponding path program 27 times [2021-12-18 19:50:39,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:39,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397470647] [2021-12-18 19:50:39,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:39,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:39,865 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 28 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:39,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:39,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397470647] [2021-12-18 19:50:39,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397470647] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:39,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299428814] [2021-12-18 19:50:39,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:50:39,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:39,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:39,876 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:50:39,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-18 19:50:41,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-18 19:50:41,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:41,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-18 19:50:41,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 28 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:41,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 28 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:42,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299428814] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:42,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:42,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 68 [2021-12-18 19:50:42,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170307181] [2021-12-18 19:50:42,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:42,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-18 19:50:42,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:42,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-18 19:50:42,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=4376, Unknown=0, NotChecked=0, Total=4556 [2021-12-18 19:50:42,993 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 68 states, 68 states have (on average 4.0) internal successors, (272), 68 states have internal predecessors, (272), 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) [2021-12-18 19:50:45,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:45,030 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2021-12-18 19:50:45,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-18 19:50:45,030 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 4.0) internal successors, (272), 68 states have internal predecessors, (272), 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 136 [2021-12-18 19:50:45,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:45,031 INFO L225 Difference]: With dead ends: 216 [2021-12-18 19:50:45,031 INFO L226 Difference]: Without dead ends: 144 [2021-12-18 19:50:45,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 235 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=403, Invalid=8909, Unknown=0, NotChecked=0, Total=9312 [2021-12-18 19:50:45,041 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 331 mSDsluCounter, 3340 mSDsCounter, 0 mSdLazyCounter, 2783 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 3416 SdHoareTripleChecker+Invalid, 2870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:45,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 3416 Invalid, 2870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2783 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-18 19:50:45,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-18 19:50:45,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2021-12-18 19:50:45,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 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) [2021-12-18 19:50:45,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2021-12-18 19:50:45,043 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 136 [2021-12-18 19:50:45,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:45,043 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2021-12-18 19:50:45,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 4.0) internal successors, (272), 68 states have internal predecessors, (272), 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) [2021-12-18 19:50:45,044 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2021-12-18 19:50:45,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-18 19:50:45,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:45,044 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:45,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-18 19:50:45,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-18 19:50:45,252 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:50:45,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:45,252 INFO L85 PathProgramCache]: Analyzing trace with hash -693660054, now seen corresponding path program 28 times [2021-12-18 19:50:45,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:45,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620931285] [2021-12-18 19:50:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:45,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 325 proven. 593 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:45,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:45,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620931285] [2021-12-18 19:50:45,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620931285] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:45,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805332868] [2021-12-18 19:50:45,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:50:45,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:45,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:45,833 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:50:45,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-18 19:50:46,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:50:46,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:46,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 148 conjunts are in the unsatisfiable core [2021-12-18 19:50:46,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:46,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:50:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 378 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:47,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:50:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 435 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:49,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805332868] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:50:49,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:50:49,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 103 [2021-12-18 19:50:49,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92976094] [2021-12-18 19:50:49,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:50:49,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-18 19:50:49,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:50:49,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-18 19:50:49,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1063, Invalid=9649, Unknown=0, NotChecked=0, Total=10712 [2021-12-18 19:50:49,788 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand has 104 states, 103 states have (on average 4.0) internal successors, (412), 104 states have internal predecessors, (412), 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) [2021-12-18 19:50:51,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:50:51,965 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2021-12-18 19:50:51,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-18 19:50:51,965 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 4.0) internal successors, (412), 104 states have internal predecessors, (412), 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 140 [2021-12-18 19:50:51,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:50:51,966 INFO L225 Difference]: With dead ends: 147 [2021-12-18 19:50:51,966 INFO L226 Difference]: Without dead ends: 147 [2021-12-18 19:50:51,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4794 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4098, Invalid=18552, Unknown=0, NotChecked=0, Total=22650 [2021-12-18 19:50:51,968 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 560 mSDsluCounter, 1568 mSDsCounter, 0 mSdLazyCounter, 2490 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 2633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:50:51,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 1632 Invalid, 2633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 19:50:51,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-18 19:50:51,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2021-12-18 19:50:51,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 145 states have internal predecessors, (148), 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) [2021-12-18 19:50:51,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2021-12-18 19:50:51,971 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 140 [2021-12-18 19:50:51,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:50:51,971 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2021-12-18 19:50:51,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 4.0) internal successors, (412), 104 states have internal predecessors, (412), 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) [2021-12-18 19:50:51,971 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2021-12-18 19:50:51,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-18 19:50:51,972 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:50:51,972 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:50:51,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-18 19:50:52,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-18 19:50:52,190 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:50:52,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:50:52,191 INFO L85 PathProgramCache]: Analyzing trace with hash -455466800, now seen corresponding path program 29 times [2021-12-18 19:50:52,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:50:52,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512889981] [2021-12-18 19:50:52,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:50:52,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:50:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:50:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 30 proven. 960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:52,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:50:52,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512889981] [2021-12-18 19:50:52,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512889981] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:50:52,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648316154] [2021-12-18 19:50:52,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:50:52,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:50:52,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:50:52,684 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:50:52,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-18 19:50:54,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-18 19:50:54,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:50:54,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 196 conjunts are in the unsatisfiable core [2021-12-18 19:50:54,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:50:54,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:50:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 378 proven. 612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:50:57,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:51:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 435 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:01,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648316154] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:51:01,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:51:01,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 51, 51] total 136 [2021-12-18 19:51:01,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263305398] [2021-12-18 19:51:01,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:51:01,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2021-12-18 19:51:01,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:51:01,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-12-18 19:51:01,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1196, Invalid=17164, Unknown=0, NotChecked=0, Total=18360 [2021-12-18 19:51:01,063 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand has 136 states, 136 states have (on average 3.139705882352941) internal successors, (427), 136 states have internal predecessors, (427), 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) [2021-12-18 19:51:08,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:51:08,500 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2021-12-18 19:51:08,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-12-18 19:51:08,500 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 3.139705882352941) internal successors, (427), 136 states have internal predecessors, (427), 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 145 [2021-12-18 19:51:08,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:51:08,501 INFO L225 Difference]: With dead ends: 236 [2021-12-18 19:51:08,501 INFO L226 Difference]: Without dead ends: 159 [2021-12-18 19:51:08,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9131 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=7066, Invalid=56186, Unknown=0, NotChecked=0, Total=63252 [2021-12-18 19:51:08,503 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 1667 mSDsluCounter, 3024 mSDsCounter, 0 mSdLazyCounter, 6219 mSolverCounterSat, 1122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 3075 SdHoareTripleChecker+Invalid, 7341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1122 IncrementalHoareTripleChecker+Valid, 6219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:51:08,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1667 Valid, 3075 Invalid, 7341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1122 Valid, 6219 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-18 19:51:08,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-18 19:51:08,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2021-12-18 19:51:08,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0194805194805194) internal successors, (157), 154 states have internal predecessors, (157), 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) [2021-12-18 19:51:08,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2021-12-18 19:51:08,506 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 145 [2021-12-18 19:51:08,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:51:08,506 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2021-12-18 19:51:08,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 3.139705882352941) internal successors, (427), 136 states have internal predecessors, (427), 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) [2021-12-18 19:51:08,506 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2021-12-18 19:51:08,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-18 19:51:08,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:51:08,507 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:51:08,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-18 19:51:08,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-18 19:51:08,715 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:51:08,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:51:08,716 INFO L85 PathProgramCache]: Analyzing trace with hash -461984633, now seen corresponding path program 30 times [2021-12-18 19:51:08,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:51:08,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537167189] [2021-12-18 19:51:08,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:51:08,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:51:08,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:51:09,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 32 proven. 1096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:09,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:51:09,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537167189] [2021-12-18 19:51:09,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537167189] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:51:09,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765319098] [2021-12-18 19:51:09,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:51:09,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:51:09,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:51:09,397 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:51:09,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-18 19:51:10,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-12-18 19:51:10,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:51:10,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-18 19:51:10,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:51:10,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:51:11,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 19:51:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 32 proven. 1096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:12,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:51:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 32 proven. 1096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:14,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765319098] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:51:14,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:51:14,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 92 [2021-12-18 19:51:14,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714749360] [2021-12-18 19:51:14,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:51:14,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-18 19:51:14,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:51:14,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-18 19:51:14,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=8090, Unknown=0, NotChecked=0, Total=8372 [2021-12-18 19:51:14,248 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand has 92 states, 92 states have (on average 4.010869565217392) internal successors, (369), 92 states have internal predecessors, (369), 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) [2021-12-18 19:51:16,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:51:16,860 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2021-12-18 19:51:16,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-18 19:51:16,860 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 4.010869565217392) internal successors, (369), 92 states have internal predecessors, (369), 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 154 [2021-12-18 19:51:16,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:51:16,861 INFO L225 Difference]: With dead ends: 244 [2021-12-18 19:51:16,861 INFO L226 Difference]: Without dead ends: 162 [2021-12-18 19:51:16,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2657 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=848, Invalid=14902, Unknown=0, NotChecked=0, Total=15750 [2021-12-18 19:51:16,862 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 238 mSDsluCounter, 4751 mSDsCounter, 0 mSdLazyCounter, 4827 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 4837 SdHoareTripleChecker+Invalid, 4909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 4827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:51:16,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 4837 Invalid, 4909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 4827 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-18 19:51:16,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-18 19:51:16,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2021-12-18 19:51:16,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 states have internal predecessors, (161), 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) [2021-12-18 19:51:16,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2021-12-18 19:51:16,865 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 154 [2021-12-18 19:51:16,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:51:16,865 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2021-12-18 19:51:16,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 4.010869565217392) internal successors, (369), 92 states have internal predecessors, (369), 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) [2021-12-18 19:51:16,865 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2021-12-18 19:51:16,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-18 19:51:16,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:51:16,866 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:51:16,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-18 19:51:17,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-18 19:51:17,068 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:51:17,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:51:17,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1331905436, now seen corresponding path program 31 times [2021-12-18 19:51:17,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:51:17,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053453278] [2021-12-18 19:51:17,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:51:17,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:51:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:51:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 435 proven. 758 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:17,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:51:17,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053453278] [2021-12-18 19:51:17,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053453278] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:51:17,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483344353] [2021-12-18 19:51:17,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:51:17,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:51:17,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:51:17,826 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:51:17,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-18 19:51:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:51:18,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 162 conjunts are in the unsatisfiable core [2021-12-18 19:51:18,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:51:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 512 proven. 681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:18,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:51:19,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 19:51:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 512 proven. 681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:19,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483344353] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:51:19,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:51:19,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 81 [2021-12-18 19:51:19,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237707471] [2021-12-18 19:51:19,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:51:19,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-18 19:51:19,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:51:19,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-18 19:51:19,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=5888, Unknown=0, NotChecked=0, Total=6642 [2021-12-18 19:51:19,278 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand has 82 states, 81 states have (on average 3.950617283950617) internal successors, (320), 82 states have internal predecessors, (320), 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) [2021-12-18 19:51:20,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:51:20,575 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2021-12-18 19:51:20,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-18 19:51:20,575 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.950617283950617) internal successors, (320), 82 states have internal predecessors, (320), 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 158 [2021-12-18 19:51:20,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:51:20,576 INFO L225 Difference]: With dead ends: 165 [2021-12-18 19:51:20,576 INFO L226 Difference]: Without dead ends: 165 [2021-12-18 19:51:20,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2935 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2719, Invalid=11323, Unknown=0, NotChecked=0, Total=14042 [2021-12-18 19:51:20,578 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 923 mSDsluCounter, 1598 mSDsCounter, 0 mSdLazyCounter, 2396 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 2624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 2396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:51:20,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 1670 Invalid, 2624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 2396 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 19:51:20,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-18 19:51:20,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2021-12-18 19:51:20,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.01840490797546) internal successors, (166), 163 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:51:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2021-12-18 19:51:20,580 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 158 [2021-12-18 19:51:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:51:20,580 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2021-12-18 19:51:20,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.950617283950617) internal successors, (320), 82 states have internal predecessors, (320), 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) [2021-12-18 19:51:20,580 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2021-12-18 19:51:20,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-18 19:51:20,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:51:20,581 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:51:20,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-18 19:51:20,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:51:20,793 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:51:20,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:51:20,793 INFO L85 PathProgramCache]: Analyzing trace with hash -907041002, now seen corresponding path program 32 times [2021-12-18 19:51:20,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:51:20,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209827819] [2021-12-18 19:51:20,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:51:20,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:51:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:51:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 34 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:21,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:51:21,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209827819] [2021-12-18 19:51:21,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209827819] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:51:21,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473128922] [2021-12-18 19:51:21,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:51:21,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:51:21,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:51:21,576 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:51:21,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-18 19:51:22,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:51:22,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:51:22,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-18 19:51:22,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:51:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 34 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:22,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:51:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 34 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:24,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473128922] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:51:24,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:51:24,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 80 [2021-12-18 19:51:24,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117720481] [2021-12-18 19:51:24,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:51:24,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-18 19:51:24,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:51:24,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-18 19:51:24,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=6110, Unknown=0, NotChecked=0, Total=6320 [2021-12-18 19:51:24,667 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand has 80 states, 80 states have (on average 4.075) internal successors, (326), 80 states have internal predecessors, (326), 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) [2021-12-18 19:51:27,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:51:27,355 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2021-12-18 19:51:27,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-18 19:51:27,355 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 4.075) internal successors, (326), 80 states have internal predecessors, (326), 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 163 [2021-12-18 19:51:27,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:51:27,356 INFO L225 Difference]: With dead ends: 258 [2021-12-18 19:51:27,356 INFO L226 Difference]: Without dead ends: 171 [2021-12-18 19:51:27,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 283 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1507 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=478, Invalid=12632, Unknown=0, NotChecked=0, Total=13110 [2021-12-18 19:51:27,357 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 190 mSDsluCounter, 4515 mSDsCounter, 0 mSdLazyCounter, 3861 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 4606 SdHoareTripleChecker+Invalid, 3915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:51:27,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 4606 Invalid, 3915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3861 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-18 19:51:27,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-18 19:51:27,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2021-12-18 19:51:27,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0179640718562875) internal successors, (170), 167 states have internal predecessors, (170), 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) [2021-12-18 19:51:27,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2021-12-18 19:51:27,359 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 163 [2021-12-18 19:51:27,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:51:27,359 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2021-12-18 19:51:27,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 4.075) internal successors, (326), 80 states have internal predecessors, (326), 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) [2021-12-18 19:51:27,359 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2021-12-18 19:51:27,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-18 19:51:27,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:51:27,359 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:51:27,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-18 19:51:27,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-18 19:51:27,571 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:51:27,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:51:27,571 INFO L85 PathProgramCache]: Analyzing trace with hash 2039554009, now seen corresponding path program 33 times [2021-12-18 19:51:27,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:51:27,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144813982] [2021-12-18 19:51:27,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:51:27,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:51:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:51:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 496 proven. 848 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:51:28,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:51:28,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144813982] [2021-12-18 19:51:28,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144813982] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:51:28,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084668459] [2021-12-18 19:51:28,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:51:28,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:51:28,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:51:28,340 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:51:28,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-18 19:51:32,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-18 19:51:32,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:51:32,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 216 conjunts are in the unsatisfiable core [2021-12-18 19:51:32,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:51:32,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:51:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 69 proven. 714 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-18 19:51:35,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:51:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1032 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-18 19:51:39,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084668459] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:51:39,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:51:39,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 43, 48] total 130 [2021-12-18 19:51:39,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093213533] [2021-12-18 19:51:39,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:51:39,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-12-18 19:51:39,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:51:39,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-12-18 19:51:39,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1463, Invalid=15567, Unknown=0, NotChecked=0, Total=17030 [2021-12-18 19:51:39,845 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 131 states, 130 states have (on average 2.9384615384615387) internal successors, (382), 131 states have internal predecessors, (382), 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) [2021-12-18 19:52:13,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:52:13,095 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2021-12-18 19:52:13,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-12-18 19:52:13,095 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 130 states have (on average 2.9384615384615387) internal successors, (382), 131 states have internal predecessors, (382), 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 167 [2021-12-18 19:52:13,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:52:13,096 INFO L225 Difference]: With dead ends: 258 [2021-12-18 19:52:13,096 INFO L226 Difference]: Without dead ends: 258 [2021-12-18 19:52:13,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14354 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=14723, Invalid=70833, Unknown=0, NotChecked=0, Total=85556 [2021-12-18 19:52:13,100 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 1303 mSDsluCounter, 2551 mSDsCounter, 0 mSdLazyCounter, 5586 mSolverCounterSat, 1129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1303 SdHoareTripleChecker+Valid, 2609 SdHoareTripleChecker+Invalid, 6715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1129 IncrementalHoareTripleChecker+Valid, 5586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:52:13,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1303 Valid, 2609 Invalid, 6715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1129 Valid, 5586 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-18 19:52:13,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-18 19:52:13,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2021-12-18 19:52:13,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.0116731517509727) internal successors, (260), 257 states have internal predecessors, (260), 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) [2021-12-18 19:52:13,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 260 transitions. [2021-12-18 19:52:13,104 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 260 transitions. Word has length 167 [2021-12-18 19:52:13,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:52:13,106 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 260 transitions. [2021-12-18 19:52:13,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 130 states have (on average 2.9384615384615387) internal successors, (382), 131 states have internal predecessors, (382), 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) [2021-12-18 19:52:13,106 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 260 transitions. [2021-12-18 19:52:13,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-12-18 19:52:13,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:52:13,107 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:52:13,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-18 19:52:13,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:52:13,314 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:52:13,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:52:13,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1287554855, now seen corresponding path program 34 times [2021-12-18 19:52:13,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:52:13,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627855597] [2021-12-18 19:52:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:52:13,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:52:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:52:14,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 2312 proven. 683 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2021-12-18 19:52:14,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:52:14,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627855597] [2021-12-18 19:52:14,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627855597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:52:14,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649387789] [2021-12-18 19:52:14,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:52:14,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:52:14,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:52:14,134 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:52:14,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-18 19:52:14,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:52:14,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:52:14,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 147 conjunts are in the unsatisfiable core [2021-12-18 19:52:14,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:52:14,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:52:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 2347 proven. 648 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2021-12-18 19:52:16,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:52:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 2347 proven. 648 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2021-12-18 19:52:18,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649387789] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:52:18,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:52:18,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 107 [2021-12-18 19:52:18,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914042582] [2021-12-18 19:52:18,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:52:18,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-12-18 19:52:18,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:52:18,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-12-18 19:52:18,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1723, Invalid=9619, Unknown=0, NotChecked=0, Total=11342 [2021-12-18 19:52:18,288 INFO L87 Difference]: Start difference. First operand 258 states and 260 transitions. Second operand has 107 states, 107 states have (on average 3.9626168224299065) internal successors, (424), 107 states have internal predecessors, (424), 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) [2021-12-18 19:52:19,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:52:19,970 INFO L93 Difference]: Finished difference Result 359 states and 361 transitions. [2021-12-18 19:52:19,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-18 19:52:19,971 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.9626168224299065) internal successors, (424), 107 states have internal predecessors, (424), 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 257 [2021-12-18 19:52:19,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:52:19,972 INFO L225 Difference]: With dead ends: 359 [2021-12-18 19:52:19,972 INFO L226 Difference]: Without dead ends: 265 [2021-12-18 19:52:19,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 450 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5663 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3771, Invalid=17985, Unknown=0, NotChecked=0, Total=21756 [2021-12-18 19:52:19,973 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 179 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:52:19,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 1051 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:52:19,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-12-18 19:52:19,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2021-12-18 19:52:19,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.0114942528735633) internal successors, (264), 261 states have internal predecessors, (264), 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) [2021-12-18 19:52:19,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 264 transitions. [2021-12-18 19:52:19,977 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 264 transitions. Word has length 257 [2021-12-18 19:52:19,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:52:19,977 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 264 transitions. [2021-12-18 19:52:19,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.9626168224299065) internal successors, (424), 107 states have internal predecessors, (424), 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) [2021-12-18 19:52:19,977 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 264 transitions. [2021-12-18 19:52:19,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-12-18 19:52:19,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:52:19,978 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:52:20,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-18 19:52:20,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:52:20,197 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:52:20,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:52:20,198 INFO L85 PathProgramCache]: Analyzing trace with hash 650371676, now seen corresponding path program 35 times [2021-12-18 19:52:20,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:52:20,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910460439] [2021-12-18 19:52:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:52:20,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:52:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:52:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3748 backedges. 2389 proven. 759 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2021-12-18 19:52:21,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:52:21,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910460439] [2021-12-18 19:52:21,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910460439] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:52:21,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032351364] [2021-12-18 19:52:21,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:52:21,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:52:21,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:52:21,147 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:52:21,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-18 19:53:36,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-12-18 19:53:36,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:53:36,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 190 conjunts are in the unsatisfiable core [2021-12-18 19:53:36,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:53:36,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:53:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3748 backedges. 2795 proven. 728 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-12-18 19:53:38,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:53:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3748 backedges. 2795 proven. 728 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-12-18 19:53:40,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032351364] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:53:40,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:53:40,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 51, 51] total 124 [2021-12-18 19:53:40,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537658887] [2021-12-18 19:53:40,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:53:40,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2021-12-18 19:53:40,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:53:40,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-12-18 19:53:40,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2672, Invalid=12580, Unknown=0, NotChecked=0, Total=15252 [2021-12-18 19:53:40,231 INFO L87 Difference]: Start difference. First operand 262 states and 264 transitions. Second operand has 124 states, 124 states have (on average 4.080645161290323) internal successors, (506), 124 states have internal predecessors, (506), 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) [2021-12-18 19:53:43,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:53:43,030 INFO L93 Difference]: Finished difference Result 518 states and 525 transitions. [2021-12-18 19:53:43,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-18 19:53:43,030 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 4.080645161290323) internal successors, (506), 124 states have internal predecessors, (506), 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 261 [2021-12-18 19:53:43,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:53:43,032 INFO L225 Difference]: With dead ends: 518 [2021-12-18 19:53:43,032 INFO L226 Difference]: Without dead ends: 290 [2021-12-18 19:53:43,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 443 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9856 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=6962, Invalid=30868, Unknown=0, NotChecked=0, Total=37830 [2021-12-18 19:53:43,037 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 287 mSDsluCounter, 1688 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:53:43,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 1753 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 19:53:43,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-12-18 19:53:43,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2021-12-18 19:53:43,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.0103806228373702) internal successors, (292), 289 states have internal predecessors, (292), 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) [2021-12-18 19:53:43,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 292 transitions. [2021-12-18 19:53:43,041 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 292 transitions. Word has length 261 [2021-12-18 19:53:43,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:53:43,041 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 292 transitions. [2021-12-18 19:53:43,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 4.080645161290323) internal successors, (506), 124 states have internal predecessors, (506), 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) [2021-12-18 19:53:43,042 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 292 transitions. [2021-12-18 19:53:43,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-12-18 19:53:43,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:53:43,043 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:53:43,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-12-18 19:53:43,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-18 19:53:43,256 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:53:43,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:53:43,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2085190385, now seen corresponding path program 36 times [2021-12-18 19:53:43,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:53:43,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298497275] [2021-12-18 19:53:43,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:53:43,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:53:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:53:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 2788 proven. 1403 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-18 19:53:44,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:53:44,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298497275] [2021-12-18 19:53:44,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298497275] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:53:44,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941207844] [2021-12-18 19:53:44,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:53:44,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:53:44,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:53:44,352 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:53:44,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-18 19:54:59,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2021-12-18 19:54:59,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:54:59,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 251 conjunts are in the unsatisfiable core [2021-12-18 19:54:59,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:54:59,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-18 19:55:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 3011 proven. 1360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:55:03,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:55:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 3011 proven. 1360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:55:07,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941207844] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:55:07,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:55:07,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 67, 67] total 163 [2021-12-18 19:55:07,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311488333] [2021-12-18 19:55:07,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:55:07,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2021-12-18 19:55:07,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:55:07,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2021-12-18 19:55:07,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5042, Invalid=21364, Unknown=0, NotChecked=0, Total=26406 [2021-12-18 19:55:07,156 INFO L87 Difference]: Start difference. First operand 290 states and 292 transitions. Second operand has 163 states, 163 states have (on average 4.171779141104294) internal successors, (680), 163 states have internal predecessors, (680), 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) [2021-12-18 19:55:10,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:55:10,824 INFO L93 Difference]: Finished difference Result 634 states and 643 transitions. [2021-12-18 19:55:10,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-12-18 19:55:10,825 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 4.171779141104294) internal successors, (680), 163 states have internal predecessors, (680), 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 289 [2021-12-18 19:55:10,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:55:10,825 INFO L225 Difference]: With dead ends: 634 [2021-12-18 19:55:10,825 INFO L226 Difference]: Without dead ends: 326 [2021-12-18 19:55:10,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 474 SyntacticMatches, 1 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13381 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=10796, Invalid=42334, Unknown=0, NotChecked=0, Total=53130 [2021-12-18 19:55:10,828 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 322 mSDsluCounter, 1985 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 2071 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:55:10,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 2071 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1688 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 19:55:10,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-12-18 19:55:10,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2021-12-18 19:55:10,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.0092307692307692) internal successors, (328), 325 states have internal predecessors, (328), 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) [2021-12-18 19:55:10,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 328 transitions. [2021-12-18 19:55:10,830 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 328 transitions. Word has length 289 [2021-12-18 19:55:10,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:55:10,830 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 328 transitions. [2021-12-18 19:55:10,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 4.171779141104294) internal successors, (680), 163 states have internal predecessors, (680), 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) [2021-12-18 19:55:10,831 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 328 transitions. [2021-12-18 19:55:10,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-12-18 19:55:10,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:55:10,847 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:55:10,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-18 19:55:11,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-18 19:55:11,060 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:55:11,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:55:11,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1438117516, now seen corresponding path program 37 times [2021-12-18 19:55:11,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:55:11,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809947059] [2021-12-18 19:55:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:55:11,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:55:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:55:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 70 proven. 5390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:55:13,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:55:13,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809947059] [2021-12-18 19:55:13,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809947059] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:55:13,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397741345] [2021-12-18 19:55:13,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:55:13,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:55:13,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:55:13,027 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:55:13,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-18 19:55:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:55:14,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 148 conjunts are in the unsatisfiable core [2021-12-18 19:55:14,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:55:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 70 proven. 5390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:55:15,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:55:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 70 proven. 5390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:55:22,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397741345] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:55:22,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:55:22,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 152 [2021-12-18 19:55:22,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511855860] [2021-12-18 19:55:22,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:55:22,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2021-12-18 19:55:22,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:55:22,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2021-12-18 19:55:22,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=22562, Unknown=0, NotChecked=0, Total=22952 [2021-12-18 19:55:22,753 INFO L87 Difference]: Start difference. First operand 326 states and 328 transitions. Second operand has 152 states, 152 states have (on average 4.276315789473684) internal successors, (650), 152 states have internal predecessors, (650), 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) [2021-12-18 19:55:33,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:55:33,464 INFO L93 Difference]: Finished difference Result 510 states and 512 transitions. [2021-12-18 19:55:33,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-12-18 19:55:33,465 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 4.276315789473684) internal successors, (650), 152 states have internal predecessors, (650), 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 325 [2021-12-18 19:55:33,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:55:33,474 INFO L225 Difference]: With dead ends: 510 [2021-12-18 19:55:33,474 INFO L226 Difference]: Without dead ends: 333 [2021-12-18 19:55:33,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 571 SyntacticMatches, 3 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5593 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=928, Invalid=48578, Unknown=0, NotChecked=0, Total=49506 [2021-12-18 19:55:33,476 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 646 mSDsluCounter, 18497 mSDsCounter, 0 mSdLazyCounter, 15208 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 18678 SdHoareTripleChecker+Invalid, 15385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 15208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:55:33,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 18678 Invalid, 15385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 15208 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-18 19:55:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-18 19:55:33,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 330. [2021-12-18 19:55:33,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.0091185410334347) internal successors, (332), 329 states have internal predecessors, (332), 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) [2021-12-18 19:55:33,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 332 transitions. [2021-12-18 19:55:33,481 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 332 transitions. Word has length 325 [2021-12-18 19:55:33,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:55:33,481 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 332 transitions. [2021-12-18 19:55:33,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 4.276315789473684) internal successors, (650), 152 states have internal predecessors, (650), 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) [2021-12-18 19:55:33,482 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 332 transitions. [2021-12-18 19:55:33,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-12-18 19:55:33,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:55:33,483 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:55:33,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-18 19:55:33,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-18 19:55:33,695 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:55:33,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:55:33,696 INFO L85 PathProgramCache]: Analyzing trace with hash 416433807, now seen corresponding path program 38 times [2021-12-18 19:55:33,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:55:33,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222781831] [2021-12-18 19:55:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:55:33,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:55:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:55:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5601 backedges. 2278 proven. 3323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:55:35,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:55:35,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222781831] [2021-12-18 19:55:35,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222781831] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:55:35,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826937788] [2021-12-18 19:55:35,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:55:35,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:55:35,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:55:35,639 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:55:35,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-18 19:55:35,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:55:35,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:55:35,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 1273 conjuncts, 333 conjunts are in the unsatisfiable core [2021-12-18 19:55:35,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:55:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5601 backedges. 2450 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:55:38,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:55:40,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-18 19:55:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5601 backedges. 2450 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:55:40,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826937788] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:55:40,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:55:40,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 157 [2021-12-18 19:55:40,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614762191] [2021-12-18 19:55:40,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:55:40,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2021-12-18 19:55:40,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:55:40,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2021-12-18 19:55:40,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=22551, Unknown=0, NotChecked=0, Total=24806 [2021-12-18 19:55:40,666 INFO L87 Difference]: Start difference. First operand 330 states and 332 transitions. Second operand has 158 states, 157 states have (on average 4.2165605095541405) internal successors, (662), 158 states have internal predecessors, (662), 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) [2021-12-18 19:55:47,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:55:47,430 INFO L93 Difference]: Finished difference Result 336 states and 338 transitions. [2021-12-18 19:55:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-12-18 19:55:47,431 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 157 states have (on average 4.2165605095541405) internal successors, (662), 158 states have internal predecessors, (662), 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 329 [2021-12-18 19:55:47,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:55:47,432 INFO L225 Difference]: With dead ends: 336 [2021-12-18 19:55:47,432 INFO L226 Difference]: Without dead ends: 336 [2021-12-18 19:55:47,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 576 SyntacticMatches, 1 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10433 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=14391, Invalid=57165, Unknown=0, NotChecked=0, Total=71556 [2021-12-18 19:55:47,435 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 2001 mSDsluCounter, 6245 mSDsCounter, 0 mSdLazyCounter, 8766 mSolverCounterSat, 511 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2001 SdHoareTripleChecker+Valid, 6393 SdHoareTripleChecker+Invalid, 9277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 511 IncrementalHoareTripleChecker+Valid, 8766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:55:47,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2001 Valid, 6393 Invalid, 9277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [511 Valid, 8766 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-18 19:55:47,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-18 19:55:47,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 335. [2021-12-18 19:55:47,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.0089820359281436) internal successors, (337), 334 states have internal predecessors, (337), 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) [2021-12-18 19:55:47,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 337 transitions. [2021-12-18 19:55:47,438 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 337 transitions. Word has length 329 [2021-12-18 19:55:47,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:55:47,438 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 337 transitions. [2021-12-18 19:55:47,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 157 states have (on average 4.2165605095541405) internal successors, (662), 158 states have internal predecessors, (662), 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) [2021-12-18 19:55:47,438 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 337 transitions. [2021-12-18 19:55:47,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-12-18 19:55:47,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:55:47,439 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:55:47,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-18 19:55:47,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-18 19:55:47,657 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 19:55:47,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:55:47,658 INFO L85 PathProgramCache]: Analyzing trace with hash 16826315, now seen corresponding path program 39 times [2021-12-18 19:55:47,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:55:47,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81277246] [2021-12-18 19:55:47,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:55:47,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:55:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:55:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 72 proven. 5706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:55:50,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:55:50,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81277246] [2021-12-18 19:55:50,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81277246] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:55:50,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456680467] [2021-12-18 19:55:50,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:55:50,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:55:50,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:55:50,156 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:55:50,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-18 20:00:02,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2021-12-18 20:00:02,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:02,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 1293 conjuncts, 152 conjunts are in the unsatisfiable core [2021-12-18 20:00:02,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 72 proven. 5706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:04,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:10,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 72 proven. 5706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:10,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456680467] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:10,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:10,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 156 [2021-12-18 20:00:10,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105904413] [2021-12-18 20:00:10,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:10,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2021-12-18 20:00:10,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:10,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2021-12-18 20:00:10,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=23780, Unknown=0, NotChecked=0, Total=24180 [2021-12-18 20:00:10,444 INFO L87 Difference]: Start difference. First operand 335 states and 337 transitions. Second operand has 156 states, 156 states have (on average 4.282051282051282) internal successors, (668), 156 states have internal predecessors, (668), 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) [2021-12-18 20:00:22,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:22,170 INFO L93 Difference]: Finished difference Result 524 states and 526 transitions. [2021-12-18 20:00:22,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-12-18 20:00:22,170 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 4.282051282051282) internal successors, (668), 156 states have internal predecessors, (668), 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 334 [2021-12-18 20:00:22,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:22,171 INFO L225 Difference]: With dead ends: 524 [2021-12-18 20:00:22,171 INFO L226 Difference]: Without dead ends: 342 [2021-12-18 20:00:22,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 586 SyntacticMatches, 4 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5896 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=953, Invalid=51259, Unknown=0, NotChecked=0, Total=52212 [2021-12-18 20:00:22,174 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 661 mSDsluCounter, 20997 mSDsCounter, 0 mSdLazyCounter, 17289 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 21183 SdHoareTripleChecker+Invalid, 17471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 17289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:22,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 21183 Invalid, 17471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 17289 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2021-12-18 20:00:22,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-18 20:00:22,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 339. [2021-12-18 20:00:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.0088757396449703) internal successors, (341), 338 states have internal predecessors, (341), 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) [2021-12-18 20:00:22,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 341 transitions. [2021-12-18 20:00:22,177 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 341 transitions. Word has length 334 [2021-12-18 20:00:22,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:22,177 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 341 transitions. [2021-12-18 20:00:22,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 4.282051282051282) internal successors, (668), 156 states have internal predecessors, (668), 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) [2021-12-18 20:00:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 341 transitions. [2021-12-18 20:00:22,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-12-18 20:00:22,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:22,179 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:22,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-18 20:00:22,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:22,380 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 20:00:22,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:22,380 INFO L85 PathProgramCache]: Analyzing trace with hash 921025320, now seen corresponding path program 40 times [2021-12-18 20:00:22,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:22,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919568637] [2021-12-18 20:00:22,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:22,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5923 backedges. 2415 proven. 3508 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:24,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:24,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919568637] [2021-12-18 20:00:24,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919568637] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:24,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436367145] [2021-12-18 20:00:24,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:00:24,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:24,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:24,411 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:00:24,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-18 20:00:25,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:00:25,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:00:25,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 347 conjunts are in the unsatisfiable core [2021-12-18 20:00:25,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:00:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5923 backedges. 2592 proven. 3331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:29,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:00:32,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-12-18 20:00:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5923 backedges. 2592 proven. 3331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:36,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436367145] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:00:36,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:00:36,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 196 [2021-12-18 20:00:36,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882623853] [2021-12-18 20:00:36,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:00:36,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2021-12-18 20:00:36,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:00:36,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2021-12-18 20:00:36,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3843, Invalid=34769, Unknown=0, NotChecked=0, Total=38612 [2021-12-18 20:00:36,162 INFO L87 Difference]: Start difference. First operand 339 states and 341 transitions. Second operand has 197 states, 196 states have (on average 4.214285714285714) internal successors, (826), 197 states have internal predecessors, (826), 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) [2021-12-18 20:00:46,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:00:46,934 INFO L93 Difference]: Finished difference Result 345 states and 347 transitions. [2021-12-18 20:00:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-12-18 20:00:46,935 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 196 states have (on average 4.214285714285714) internal successors, (826), 197 states have internal predecessors, (826), 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 338 [2021-12-18 20:00:46,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:00:46,936 INFO L225 Difference]: With dead ends: 345 [2021-12-18 20:00:46,936 INFO L226 Difference]: Without dead ends: 345 [2021-12-18 20:00:46,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 557 SyntacticMatches, 1 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15768 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=20177, Invalid=75613, Unknown=0, NotChecked=0, Total=95790 [2021-12-18 20:00:46,939 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 1591 mSDsluCounter, 6710 mSDsCounter, 0 mSdLazyCounter, 9477 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1591 SdHoareTripleChecker+Valid, 6862 SdHoareTripleChecker+Invalid, 9890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 9477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:00:46,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1591 Valid, 6862 Invalid, 9890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 9477 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-18 20:00:46,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-12-18 20:00:46,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 344. [2021-12-18 20:00:46,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.0087463556851313) internal successors, (346), 343 states have internal predecessors, (346), 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) [2021-12-18 20:00:46,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 346 transitions. [2021-12-18 20:00:46,944 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 346 transitions. Word has length 338 [2021-12-18 20:00:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:00:46,945 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 346 transitions. [2021-12-18 20:00:46,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 196 states have (on average 4.214285714285714) internal successors, (826), 197 states have internal predecessors, (826), 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) [2021-12-18 20:00:46,945 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 346 transitions. [2021-12-18 20:00:46,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2021-12-18 20:00:46,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:00:46,947 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:00:46,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-12-18 20:00:47,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-18 20:00:47,166 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1 more)] === [2021-12-18 20:00:47,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:00:47,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1374993710, now seen corresponding path program 41 times [2021-12-18 20:00:47,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:00:47,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753262358] [2021-12-18 20:00:47,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:00:47,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:00:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:00:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 74 proven. 6031 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:00:49,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:00:49,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753262358] [2021-12-18 20:00:49,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753262358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:00:49,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277523130] [2021-12-18 20:00:49,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:00:49,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:00:49,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:00:49,739 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:00:49,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process Killed by 15