./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-pthread/cs_stateful-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/AutomizerReach.xml -i ../sv-benchmarks/c/seq-pthread/cs_stateful-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c1d6cba599289c2637bd3d8da41e464d318a32e6ae6e6e0e391ff437e6ce1fcc --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 01:41:25,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 01:41:25,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 01:41:25,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 01:41:25,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 01:41:25,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 01:41:25,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 01:41:25,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 01:41:25,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 01:41:25,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 01:41:25,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 01:41:25,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 01:41:25,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 01:41:25,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 01:41:25,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 01:41:25,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 01:41:25,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 01:41:25,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 01:41:25,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 01:41:25,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 01:41:25,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 01:41:25,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 01:41:25,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 01:41:25,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 01:41:25,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 01:41:25,327 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 01:41:25,327 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 01:41:25,328 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 01:41:25,329 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 01:41:25,329 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 01:41:25,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 01:41:25,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 01:41:25,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 01:41:25,331 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 01:41:25,332 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 01:41:25,332 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 01:41:25,333 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 01:41:25,333 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 01:41:25,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 01:41:25,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 01:41:25,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 01:41:25,335 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 01:41:25,365 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 01:41:25,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 01:41:25,375 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 01:41:25,376 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 01:41:25,376 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 01:41:25,377 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 01:41:25,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 01:41:25,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 01:41:25,378 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 01:41:25,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 01:41:25,379 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 01:41:25,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 01:41:25,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 01:41:25,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 01:41:25,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 01:41:25,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 01:41:25,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 01:41:25,380 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 01:41:25,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 01:41:25,381 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 01:41:25,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 01:41:25,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 01:41:25,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 01:41:25,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 01:41:25,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:41:25,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 01:41:25,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 01:41:25,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 01:41:25,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 01:41:25,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 01:41:25,383 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 01:41:25,384 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 01:41:25,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 01:41:25,384 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 01:41:25,384 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1d6cba599289c2637bd3d8da41e464d318a32e6ae6e6e0e391ff437e6ce1fcc [2021-12-16 01:41:25,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 01:41:25,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 01:41:25,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 01:41:25,650 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 01:41:25,650 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 01:41:25,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-pthread/cs_stateful-2.i [2021-12-16 01:41:25,712 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/598fca29d/382144c4ae9b4388abc8c2c2fa74ffb9/FLAG434d7e88a [2021-12-16 01:41:26,173 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 01:41:26,174 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_stateful-2.i [2021-12-16 01:41:26,189 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/598fca29d/382144c4ae9b4388abc8c2c2fa74ffb9/FLAG434d7e88a [2021-12-16 01:41:26,202 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/598fca29d/382144c4ae9b4388abc8c2c2fa74ffb9 [2021-12-16 01:41:26,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 01:41:26,205 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 01:41:26,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 01:41:26,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 01:41:26,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 01:41:26,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:41:26" (1/1) ... [2021-12-16 01:41:26,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f119b81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:26, skipping insertion in model container [2021-12-16 01:41:26,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 01:41:26" (1/1) ... [2021-12-16 01:41:26,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 01:41:26,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 01:41:26,497 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_stateful-2.i[23607,23620] [2021-12-16 01:41:26,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:41:26,603 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 01:41:26,635 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_stateful-2.i[23607,23620] [2021-12-16 01:41:26,685 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 01:41:26,721 INFO L208 MainTranslator]: Completed translation [2021-12-16 01:41:26,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:26 WrapperNode [2021-12-16 01:41:26,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 01:41:26,723 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 01:41:26,723 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 01:41:26,723 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 01:41:26,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:26" (1/1) ... [2021-12-16 01:41:26,749 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:26" (1/1) ... [2021-12-16 01:41:26,787 INFO L137 Inliner]: procedures = 145, calls = 245, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 539 [2021-12-16 01:41:26,788 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 01:41:26,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 01:41:26,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 01:41:26,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 01:41:26,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:26" (1/1) ... [2021-12-16 01:41:26,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:26" (1/1) ... [2021-12-16 01:41:26,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:26" (1/1) ... [2021-12-16 01:41:26,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:26" (1/1) ... [2021-12-16 01:41:26,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:26" (1/1) ... [2021-12-16 01:41:26,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:26" (1/1) ... [2021-12-16 01:41:26,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:26" (1/1) ... [2021-12-16 01:41:26,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 01:41:26,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 01:41:26,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 01:41:26,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 01:41:26,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:26" (1/1) ... [2021-12-16 01:41:26,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 01:41:26,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:41:26,913 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) [2021-12-16 01:41:26,934 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 [2021-12-16 01:41:26,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 01:41:26,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 01:41:26,954 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 01:41:26,954 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 01:41:26,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 01:41:26,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 01:41:26,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 01:41:26,956 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_init [2021-12-16 01:41:26,956 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_init [2021-12-16 01:41:26,956 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_lock [2021-12-16 01:41:26,956 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_lock [2021-12-16 01:41:26,956 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2021-12-16 01:41:26,956 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2021-12-16 01:41:26,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 01:41:26,957 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2021-12-16 01:41:26,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2021-12-16 01:41:26,957 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-12-16 01:41:26,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-12-16 01:41:26,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 01:41:26,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 01:41:26,958 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2021-12-16 01:41:26,958 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2021-12-16 01:41:26,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 01:41:26,958 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_unlock [2021-12-16 01:41:26,958 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_unlock [2021-12-16 01:41:26,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 01:41:26,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 01:41:27,142 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 01:41:27,146 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 01:41:27,417 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L750: SUMMARY for call __CS_cs(); srcloc: null [2021-12-16 01:41:27,417 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L750-1: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset);havoc main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset);havoc main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset; [2021-12-16 01:41:27,418 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L750-1: assume !(0 != ~__CS_ret~0 % 256); [2021-12-16 01:41:27,418 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##31: assume !(0 != ~__CS_ret~0 % 256); [2021-12-16 01:41:27,418 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##30: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset);havoc main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset);havoc main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset; [2021-12-16 01:41:27,418 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##29: assume !(0 != ~__CS_ret~0 % 256); [2021-12-16 01:41:27,418 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##28: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset);havoc main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset);havoc main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset; [2021-12-16 01:41:28,196 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 01:41:28,208 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 01:41:28,209 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 01:41:28,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:41:28 BoogieIcfgContainer [2021-12-16 01:41:28,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 01:41:28,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 01:41:28,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 01:41:28,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 01:41:28,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 01:41:26" (1/3) ... [2021-12-16 01:41:28,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c0d716 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:41:28, skipping insertion in model container [2021-12-16 01:41:28,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 01:41:26" (2/3) ... [2021-12-16 01:41:28,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c0d716 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 01:41:28, skipping insertion in model container [2021-12-16 01:41:28,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 01:41:28" (3/3) ... [2021-12-16 01:41:28,223 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_stateful-2.i [2021-12-16 01:41:28,229 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 01:41:28,229 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 01:41:28,270 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 01:41:28,277 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 01:41:28,278 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 01:41:28,297 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 111 states have (on average 1.4504504504504505) internal successors, (161), 112 states have internal predecessors, (161), 54 states have call successors, (54), 8 states have call predecessors, (54), 8 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2021-12-16 01:41:28,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-16 01:41:28,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:41:28,312 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:41:28,312 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:41:28,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:41:28,324 INFO L85 PathProgramCache]: Analyzing trace with hash 246520095, now seen corresponding path program 1 times [2021-12-16 01:41:28,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:41:28,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832035686] [2021-12-16 01:41:28,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:28,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:41:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:28,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 01:41:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:28,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 01:41:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:28,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 01:41:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:28,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-16 01:41:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:28,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-16 01:41:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:28,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 01:41:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:28,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 01:41:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:28,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 01:41:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:28,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 01:41:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:28,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-16 01:41:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-16 01:41:28,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:41:28,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832035686] [2021-12-16 01:41:28,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832035686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:41:28,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:41:28,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 01:41:28,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119340384] [2021-12-16 01:41:28,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:41:28,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 01:41:28,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:41:28,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 01:41:28,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 01:41:28,921 INFO L87 Difference]: Start difference. First operand has 175 states, 111 states have (on average 1.4504504504504505) internal successors, (161), 112 states have internal predecessors, (161), 54 states have call successors, (54), 8 states have call predecessors, (54), 8 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-16 01:41:28,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:41:28,985 INFO L93 Difference]: Finished difference Result 348 states and 578 transitions. [2021-12-16 01:41:28,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 01:41:28,986 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 72 [2021-12-16 01:41:28,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:41:28,996 INFO L225 Difference]: With dead ends: 348 [2021-12-16 01:41:28,996 INFO L226 Difference]: Without dead ends: 171 [2021-12-16 01:41:29,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 01:41:29,007 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:41:29,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:41:29,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-16 01:41:29,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-12-16 01:41:29,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 108 states have (on average 1.4166666666666667) internal successors, (153), 108 states have internal predecessors, (153), 54 states have call successors, (54), 8 states have call predecessors, (54), 8 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2021-12-16 01:41:29,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 261 transitions. [2021-12-16 01:41:29,084 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 261 transitions. Word has length 72 [2021-12-16 01:41:29,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:41:29,084 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 261 transitions. [2021-12-16 01:41:29,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-16 01:41:29,085 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 261 transitions. [2021-12-16 01:41:29,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-16 01:41:29,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:41:29,090 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:41:29,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 01:41:29,091 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:41:29,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:41:29,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1330951645, now seen corresponding path program 1 times [2021-12-16 01:41:29,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:41:29,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835294575] [2021-12-16 01:41:29,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:29,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:41:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 01:41:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 01:41:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 01:41:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-16 01:41:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-16 01:41:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-16 01:41:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-16 01:41:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 01:41:29,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 01:41:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-16 01:41:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,466 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-16 01:41:29,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:41:29,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835294575] [2021-12-16 01:41:29,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835294575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:41:29,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:41:29,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:41:29,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353704583] [2021-12-16 01:41:29,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:41:29,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:41:29,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:41:29,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:41:29,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:41:29,473 INFO L87 Difference]: Start difference. First operand 171 states and 261 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-16 01:41:29,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:41:29,531 INFO L93 Difference]: Finished difference Result 340 states and 520 transitions. [2021-12-16 01:41:29,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:41:29,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 72 [2021-12-16 01:41:29,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:41:29,535 INFO L225 Difference]: With dead ends: 340 [2021-12-16 01:41:29,540 INFO L226 Difference]: Without dead ends: 175 [2021-12-16 01:41:29,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:41:29,543 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 4 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:41:29,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 514 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:41:29,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-16 01:41:29,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2021-12-16 01:41:29,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 109 states have (on average 1.4128440366972477) internal successors, (154), 109 states have internal predecessors, (154), 54 states have call successors, (54), 8 states have call predecessors, (54), 8 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2021-12-16 01:41:29,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 262 transitions. [2021-12-16 01:41:29,574 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 262 transitions. Word has length 72 [2021-12-16 01:41:29,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:41:29,575 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 262 transitions. [2021-12-16 01:41:29,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-16 01:41:29,575 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 262 transitions. [2021-12-16 01:41:29,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-16 01:41:29,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:41:29,581 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:41:29,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 01:41:29,582 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:41:29,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:41:29,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1826847327, now seen corresponding path program 1 times [2021-12-16 01:41:29,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:41:29,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486395562] [2021-12-16 01:41:29,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:29,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:41:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 01:41:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 01:41:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 01:41:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 01:41:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 01:41:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-16 01:41:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 01:41:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 01:41:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-16 01:41:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 01:41:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-16 01:41:29,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:41:29,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486395562] [2021-12-16 01:41:29,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486395562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:41:29,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:41:29,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 01:41:29,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134205505] [2021-12-16 01:41:29,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:41:29,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 01:41:29,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:41:29,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 01:41:29,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:41:29,815 INFO L87 Difference]: Start difference. First operand 172 states and 262 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-16 01:41:29,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:41:29,866 INFO L93 Difference]: Finished difference Result 343 states and 524 transitions. [2021-12-16 01:41:29,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 01:41:29,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 75 [2021-12-16 01:41:29,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:41:29,875 INFO L225 Difference]: With dead ends: 343 [2021-12-16 01:41:29,875 INFO L226 Difference]: Without dead ends: 174 [2021-12-16 01:41:29,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 01:41:29,878 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 1 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:41:29,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 515 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:41:29,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-16 01:41:29,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2021-12-16 01:41:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 110 states have (on average 1.4090909090909092) internal successors, (155), 110 states have internal predecessors, (155), 54 states have call successors, (54), 8 states have call predecessors, (54), 8 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2021-12-16 01:41:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 263 transitions. [2021-12-16 01:41:29,894 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 263 transitions. Word has length 75 [2021-12-16 01:41:29,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:41:29,894 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 263 transitions. [2021-12-16 01:41:29,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-16 01:41:29,895 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 263 transitions. [2021-12-16 01:41:29,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-16 01:41:29,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:41:29,897 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:41:29,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 01:41:29,897 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:41:29,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:41:29,898 INFO L85 PathProgramCache]: Analyzing trace with hash -541531615, now seen corresponding path program 1 times [2021-12-16 01:41:29,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:41:29,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828572039] [2021-12-16 01:41:29,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:29,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:41:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:30,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 01:41:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:30,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 01:41:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:30,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 01:41:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:30,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 01:41:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:30,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 01:41:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:30,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 01:41:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:30,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 01:41:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:30,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 01:41:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:30,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 01:41:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:30,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 01:41:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-16 01:41:30,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:41:30,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828572039] [2021-12-16 01:41:30,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828572039] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:41:30,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308709288] [2021-12-16 01:41:30,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:30,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:41:30,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:41:30,067 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) [2021-12-16 01:41:30,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 01:41:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:30,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 1765 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 01:41:30,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:41:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-16 01:41:30,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 01:41:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-16 01:41:31,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308709288] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 01:41:31,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 01:41:31,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-12-16 01:41:31,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67308603] [2021-12-16 01:41:31,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 01:41:31,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 01:41:31,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:41:31,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 01:41:31,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:41:31,166 INFO L87 Difference]: Start difference. First operand 173 states and 263 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-12-16 01:41:31,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:41:31,204 INFO L93 Difference]: Finished difference Result 347 states and 529 transitions. [2021-12-16 01:41:31,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:41:31,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 77 [2021-12-16 01:41:31,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:41:31,206 INFO L225 Difference]: With dead ends: 347 [2021-12-16 01:41:31,207 INFO L226 Difference]: Without dead ends: 177 [2021-12-16 01:41:31,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:41:31,209 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 3 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:41:31,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 515 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:41:31,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-16 01:41:31,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-12-16 01:41:31,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 114 states have (on average 1.394736842105263) internal successors, (159), 114 states have internal predecessors, (159), 54 states have call successors, (54), 8 states have call predecessors, (54), 8 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2021-12-16 01:41:31,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 267 transitions. [2021-12-16 01:41:31,223 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 267 transitions. Word has length 77 [2021-12-16 01:41:31,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:41:31,224 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 267 transitions. [2021-12-16 01:41:31,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-12-16 01:41:31,224 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 267 transitions. [2021-12-16 01:41:31,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-16 01:41:31,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:41:31,226 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:41:31,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 01:41:31,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:41:31,448 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:41:31,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:41:31,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1454696411, now seen corresponding path program 2 times [2021-12-16 01:41:31,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:41:31,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074095437] [2021-12-16 01:41:31,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:31,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:41:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:31,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 01:41:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:31,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 01:41:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:31,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 01:41:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:31,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 01:41:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:31,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-16 01:41:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:31,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 01:41:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:31,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 01:41:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:31,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-16 01:41:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:31,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 01:41:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:31,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 01:41:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-16 01:41:31,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:41:31,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074095437] [2021-12-16 01:41:31,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074095437] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:41:31,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283245659] [2021-12-16 01:41:31,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 01:41:31,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:41:31,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:41:31,693 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) [2021-12-16 01:41:31,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 01:41:32,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 01:41:32,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 01:41:32,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 1519 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 01:41:32,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:41:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-16 01:41:32,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:41:32,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283245659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:41:32,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:41:32,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-16 01:41:32,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865317532] [2021-12-16 01:41:32,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:41:32,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:41:32,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:41:32,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:41:32,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 01:41:32,775 INFO L87 Difference]: Start difference. First operand 177 states and 267 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-16 01:41:32,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:41:32,805 INFO L93 Difference]: Finished difference Result 339 states and 524 transitions. [2021-12-16 01:41:32,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 01:41:32,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 81 [2021-12-16 01:41:32,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:41:32,809 INFO L225 Difference]: With dead ends: 339 [2021-12-16 01:41:32,809 INFO L226 Difference]: Without dead ends: 313 [2021-12-16 01:41:32,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-16 01:41:32,810 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 208 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 01:41:32,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 1001 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 01:41:32,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-12-16 01:41:32,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 312. [2021-12-16 01:41:32,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 198 states have (on average 1.4292929292929293) internal successors, (283), 198 states have internal predecessors, (283), 97 states have call successors, (97), 16 states have call predecessors, (97), 16 states have return successors, (105), 97 states have call predecessors, (105), 97 states have call successors, (105) [2021-12-16 01:41:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 485 transitions. [2021-12-16 01:41:32,849 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 485 transitions. Word has length 81 [2021-12-16 01:41:32,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:41:32,849 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 485 transitions. [2021-12-16 01:41:32,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-16 01:41:32,850 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 485 transitions. [2021-12-16 01:41:32,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-16 01:41:32,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:41:32,853 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:41:32,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-16 01:41:33,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:41:33,072 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:41:33,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:41:33,073 INFO L85 PathProgramCache]: Analyzing trace with hash -613977023, now seen corresponding path program 1 times [2021-12-16 01:41:33,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:41:33,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462901606] [2021-12-16 01:41:33,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:33,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:41:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 01:41:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:41:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:41:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 01:41:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 01:41:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:41:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 01:41:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:41:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 01:41:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:41:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:41:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-16 01:41:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-16 01:41:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-16 01:41:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-16 01:41:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 01:41:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-16 01:41:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-16 01:41:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-16 01:41:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-16 01:41:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-16 01:41:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2021-12-16 01:41:33,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:41:33,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462901606] [2021-12-16 01:41:33,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462901606] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:41:33,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640160430] [2021-12-16 01:41:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:33,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:41:33,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:41:33,395 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) [2021-12-16 01:41:33,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 01:41:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:34,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 2132 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 01:41:34,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:41:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2021-12-16 01:41:34,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 01:41:34,808 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2021-12-16 01:41:34,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640160430] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 01:41:34,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 01:41:34,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 9 [2021-12-16 01:41:34,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288344625] [2021-12-16 01:41:34,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 01:41:34,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 01:41:34,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:41:34,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 01:41:34,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-16 01:41:34,812 INFO L87 Difference]: Start difference. First operand 312 states and 485 transitions. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (43), 6 states have call predecessors, (43), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-12-16 01:41:36,888 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 01:41:38,904 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 01:41:39,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:41:39,383 INFO L93 Difference]: Finished difference Result 631 states and 988 transitions. [2021-12-16 01:41:39,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 01:41:39,384 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (43), 6 states have call predecessors, (43), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 155 [2021-12-16 01:41:39,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:41:39,387 INFO L225 Difference]: With dead ends: 631 [2021-12-16 01:41:39,387 INFO L226 Difference]: Without dead ends: 331 [2021-12-16 01:41:39,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 346 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-16 01:41:39,391 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 100 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 227 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-16 01:41:39,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 637 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 288 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2021-12-16 01:41:39,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-12-16 01:41:39,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 325. [2021-12-16 01:41:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 209 states have (on average 1.4114832535885167) internal successors, (295), 211 states have internal predecessors, (295), 97 states have call successors, (97), 16 states have call predecessors, (97), 18 states have return successors, (111), 97 states have call predecessors, (111), 97 states have call successors, (111) [2021-12-16 01:41:39,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 503 transitions. [2021-12-16 01:41:39,430 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 503 transitions. Word has length 155 [2021-12-16 01:41:39,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:41:39,431 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 503 transitions. [2021-12-16 01:41:39,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (43), 6 states have call predecessors, (43), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-12-16 01:41:39,432 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 503 transitions. [2021-12-16 01:41:39,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-16 01:41:39,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:41:39,438 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 6, 6, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:41:39,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 01:41:39,663 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 [2021-12-16 01:41:39,664 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:41:39,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:41:39,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1817944839, now seen corresponding path program 2 times [2021-12-16 01:41:39,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:41:39,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420120801] [2021-12-16 01:41:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:39,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:41:48,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 01:41:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:41:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:41:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 01:41:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 01:41:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:41:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 01:41:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:41:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 01:41:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:41:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:41:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-16 01:41:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-16 01:41:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-16 01:41:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-16 01:41:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-16 01:41:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-16 01:41:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-16 01:41:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-16 01:41:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-16 01:41:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-16 01:41:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2021-12-16 01:41:49,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:41:49,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420120801] [2021-12-16 01:41:49,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420120801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:41:49,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 01:41:49,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-16 01:41:49,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163901692] [2021-12-16 01:41:49,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:41:49,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 01:41:49,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:41:49,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 01:41:49,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-16 01:41:49,915 INFO L87 Difference]: Start difference. First operand 325 states and 503 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (18), 5 states have call predecessors, (18), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-16 01:41:52,046 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 01:41:52,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:41:52,712 INFO L93 Difference]: Finished difference Result 567 states and 877 transitions. [2021-12-16 01:41:52,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 01:41:52,713 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (18), 5 states have call predecessors, (18), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 164 [2021-12-16 01:41:52,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:41:52,715 INFO L225 Difference]: With dead ends: 567 [2021-12-16 01:41:52,715 INFO L226 Difference]: Without dead ends: 334 [2021-12-16 01:41:52,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-16 01:41:52,718 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 82 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 179 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-16 01:41:52,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 951 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 504 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-12-16 01:41:52,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-12-16 01:41:52,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 327. [2021-12-16 01:41:52,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 211 states have (on average 1.4075829383886256) internal successors, (297), 213 states have internal predecessors, (297), 97 states have call successors, (97), 16 states have call predecessors, (97), 18 states have return successors, (111), 97 states have call predecessors, (111), 97 states have call successors, (111) [2021-12-16 01:41:52,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 505 transitions. [2021-12-16 01:41:52,736 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 505 transitions. Word has length 164 [2021-12-16 01:41:52,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:41:52,737 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 505 transitions. [2021-12-16 01:41:52,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (18), 5 states have call predecessors, (18), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-16 01:41:52,737 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 505 transitions. [2021-12-16 01:41:52,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-16 01:41:52,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:41:52,741 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:41:52,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 01:41:52,742 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:41:52,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:41:52,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1932913341, now seen corresponding path program 1 times [2021-12-16 01:41:52,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:41:52,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059303098] [2021-12-16 01:41:52,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:52,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:41:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 01:41:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 01:41:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:41:53,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 01:41:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:41:53,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:41:53,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 01:41:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 01:41:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:41:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 01:41:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:41:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 01:41:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:41:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:41:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-16 01:41:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-16 01:41:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-16 01:41:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-16 01:41:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-16 01:41:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-16 01:41:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-16 01:41:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-12-16 01:41:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-12-16 01:41:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-12-16 01:41:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2021-12-16 01:41:53,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:41:53,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059303098] [2021-12-16 01:41:53,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059303098] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:41:53,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048310185] [2021-12-16 01:41:53,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:53,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:41:53,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:41:53,147 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) [2021-12-16 01:41:53,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 01:41:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:41:54,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 2464 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 01:41:54,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:41:54,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-12-16 01:41:54,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 01:41:54,385 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 11 treesize of output 7 [2021-12-16 01:41:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2021-12-16 01:41:54,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 01:41:54,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048310185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 01:41:54,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 01:41:54,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-12-16 01:41:54,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788650968] [2021-12-16 01:41:54,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 01:41:54,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 01:41:54,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:41:54,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 01:41:54,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-16 01:41:54,572 INFO L87 Difference]: Start difference. First operand 327 states and 505 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-16 01:41:56,578 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 01:41:56,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:41:56,723 INFO L93 Difference]: Finished difference Result 931 states and 1465 transitions. [2021-12-16 01:41:56,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 01:41:56,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) Word has length 186 [2021-12-16 01:41:56,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:41:56,728 INFO L225 Difference]: With dead ends: 931 [2021-12-16 01:41:56,728 INFO L226 Difference]: Without dead ends: 640 [2021-12-16 01:41:56,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-16 01:41:56,731 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 275 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-16 01:41:56,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 845 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-12-16 01:41:56,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-12-16 01:41:56,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 636. [2021-12-16 01:41:56,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 402 states have (on average 1.4179104477611941) internal successors, (570), 410 states have internal predecessors, (570), 193 states have call successors, (193), 32 states have call predecessors, (193), 40 states have return successors, (237), 193 states have call predecessors, (237), 193 states have call successors, (237) [2021-12-16 01:41:56,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1000 transitions. [2021-12-16 01:41:56,765 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1000 transitions. Word has length 186 [2021-12-16 01:41:56,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:41:56,766 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1000 transitions. [2021-12-16 01:41:56,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2021-12-16 01:41:56,766 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1000 transitions. [2021-12-16 01:41:56,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-16 01:41:56,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:41:56,772 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:41:56,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 01:41:56,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:41:56,987 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:41:56,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:41:56,988 INFO L85 PathProgramCache]: Analyzing trace with hash -424019013, now seen corresponding path program 1 times [2021-12-16 01:41:56,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:41:56,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697677784] [2021-12-16 01:41:56,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:41:56,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:42:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 01:42:05,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:42:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:42:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 01:42:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:42:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:42:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 01:42:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 01:42:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:42:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 01:42:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:42:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 01:42:05,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:42:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:42:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-16 01:42:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-16 01:42:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-16 01:42:05,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-16 01:42:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-16 01:42:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-16 01:42:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-16 01:42:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-16 01:42:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-16 01:42:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-16 01:42:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2021-12-16 01:42:05,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:42:05,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697677784] [2021-12-16 01:42:05,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697677784] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:42:05,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766382293] [2021-12-16 01:42:05,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:42:05,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:42:05,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:42:05,373 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) [2021-12-16 01:42:05,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 01:42:06,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:06,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 2433 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 01:42:06,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:42:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 274 proven. 6 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-12-16 01:42:06,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 01:42:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2021-12-16 01:42:07,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766382293] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 01:42:07,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 01:42:07,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 8] total 21 [2021-12-16 01:42:07,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338140210] [2021-12-16 01:42:07,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 01:42:07,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-16 01:42:07,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:42:07,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-16 01:42:07,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-12-16 01:42:07,283 INFO L87 Difference]: Start difference. First operand 636 states and 1000 transitions. Second operand has 21 states, 21 states have (on average 5.9523809523809526) internal successors, (125), 16 states have internal predecessors, (125), 5 states have call successors, (44), 7 states have call predecessors, (44), 8 states have return successors, (45), 9 states have call predecessors, (45), 5 states have call successors, (45) [2021-12-16 01:42:09,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 01:42:19,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 01:42:19,446 INFO L93 Difference]: Finished difference Result 3584 states and 5963 transitions. [2021-12-16 01:42:19,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-16 01:42:19,446 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.9523809523809526) internal successors, (125), 16 states have internal predecessors, (125), 5 states have call successors, (44), 7 states have call predecessors, (44), 8 states have return successors, (45), 9 states have call predecessors, (45), 5 states have call successors, (45) Word has length 187 [2021-12-16 01:42:19,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 01:42:19,468 INFO L225 Difference]: With dead ends: 3584 [2021-12-16 01:42:19,468 INFO L226 Difference]: Without dead ends: 2958 [2021-12-16 01:42:19,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 452 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=806, Invalid=4894, Unknown=0, NotChecked=0, Total=5700 [2021-12-16 01:42:19,478 INFO L933 BasicCegarLoop]: 489 mSDtfsCounter, 1798 mSDsluCounter, 2443 mSDsCounter, 0 mSdLazyCounter, 6760 mSolverCounterSat, 2523 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1860 SdHoareTripleChecker+Valid, 2932 SdHoareTripleChecker+Invalid, 9284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2523 IncrementalHoareTripleChecker+Valid, 6760 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-12-16 01:42:19,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1860 Valid, 2932 Invalid, 9284 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2523 Valid, 6760 Invalid, 1 Unknown, 0 Unchecked, 10.4s Time] [2021-12-16 01:42:19,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2021-12-16 01:42:19,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 2287. [2021-12-16 01:42:19,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 1521 states have (on average 1.3037475345167653) internal successors, (1983), 1442 states have internal predecessors, (1983), 596 states have call successors, (596), 95 states have call predecessors, (596), 169 states have return successors, (1069), 749 states have call predecessors, (1069), 596 states have call successors, (1069) [2021-12-16 01:42:19,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3648 transitions. [2021-12-16 01:42:19,644 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3648 transitions. Word has length 187 [2021-12-16 01:42:19,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 01:42:19,645 INFO L470 AbstractCegarLoop]: Abstraction has 2287 states and 3648 transitions. [2021-12-16 01:42:19,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.9523809523809526) internal successors, (125), 16 states have internal predecessors, (125), 5 states have call successors, (44), 7 states have call predecessors, (44), 8 states have return successors, (45), 9 states have call predecessors, (45), 5 states have call successors, (45) [2021-12-16 01:42:19,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3648 transitions. [2021-12-16 01:42:19,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-16 01:42:19,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 01:42:19,659 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 01:42:19,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 01:42:19,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:42:19,877 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 01:42:19,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 01:42:19,878 INFO L85 PathProgramCache]: Analyzing trace with hash -480295866, now seen corresponding path program 1 times [2021-12-16 01:42:19,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 01:42:19,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130750613] [2021-12-16 01:42:19,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:42:19,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 01:42:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 01:42:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:42:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:42:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 01:42:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 01:42:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:42:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-16 01:42:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 01:42:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:42:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 01:42:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 01:42:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:42:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 01:42:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:42:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 01:42:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 01:42:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 01:42:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-16 01:42:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-16 01:42:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-16 01:42:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-16 01:42:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-16 01:42:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-16 01:42:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-12-16 01:42:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-12-16 01:42:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2021-12-16 01:42:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-16 01:42:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2021-12-16 01:42:20,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 01:42:20,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130750613] [2021-12-16 01:42:20,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130750613] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 01:42:20,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599614984] [2021-12-16 01:42:20,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 01:42:20,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 01:42:20,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 01:42:20,476 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) [2021-12-16 01:42:20,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 01:42:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 01:42:21,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 2492 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 01:42:21,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 01:42:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 312 proven. 3 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-16 01:42:22,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 01:42:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 617 trivial. 0 not checked. [2021-12-16 01:42:22,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599614984] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 01:42:22,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 01:42:22,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 8] total 20 [2021-12-16 01:42:22,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155329274] [2021-12-16 01:42:22,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 01:42:22,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 01:42:22,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 01:42:22,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 01:42:22,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-12-16 01:42:22,782 INFO L87 Difference]: Start difference. First operand 2287 states and 3648 transitions. Second operand has 20 states, 19 states have (on average 6.842105263157895) internal successors, (130), 15 states have internal predecessors, (130), 6 states have call successors, (46), 7 states have call predecessors, (46), 10 states have return successors, (45), 11 states have call predecessors, (45), 6 states have call successors, (45)