./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-pthread/cs_szymanski.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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_szymanski.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 8c5cb1d1ec86f1df708ae47d652aad74925d4eb7bf3fc3a2c37d76896a5071e8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 12:20:39,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 12:20:39,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 12:20:39,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 12:20:39,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 12:20:39,178 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 12:20:39,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 12:20:39,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 12:20:39,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 12:20:39,190 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 12:20:39,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 12:20:39,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 12:20:39,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 12:20:39,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 12:20:39,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 12:20:39,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 12:20:39,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 12:20:39,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 12:20:39,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 12:20:39,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 12:20:39,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 12:20:39,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 12:20:39,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 12:20:39,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 12:20:39,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 12:20:39,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 12:20:39,235 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 12:20:39,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 12:20:39,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 12:20:39,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 12:20:39,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 12:20:39,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 12:20:39,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 12:20:39,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 12:20:39,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 12:20:39,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 12:20:39,242 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 12:20:39,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 12:20:39,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 12:20:39,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 12:20:39,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 12:20:39,256 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 12:20:39,279 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 12:20:39,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 12:20:39,300 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 12:20:39,300 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 12:20:39,301 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 12:20:39,301 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 12:20:39,301 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 12:20:39,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 12:20:39,302 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 12:20:39,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 12:20:39,302 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 12:20:39,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 12:20:39,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 12:20:39,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 12:20:39,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 12:20:39,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 12:20:39,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 12:20:39,303 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 12:20:39,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 12:20:39,304 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 12:20:39,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 12:20:39,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 12:20:39,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 12:20:39,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 12:20:39,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:20:39,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 12:20:39,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 12:20:39,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 12:20:39,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 12:20:39,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 12:20:39,306 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 12:20:39,306 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 12:20:39,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 12:20:39,307 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 12:20:39,307 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c5cb1d1ec86f1df708ae47d652aad74925d4eb7bf3fc3a2c37d76896a5071e8 [2021-12-22 12:20:39,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 12:20:39,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 12:20:39,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 12:20:39,603 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 12:20:39,604 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 12:20:39,605 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-pthread/cs_szymanski.i [2021-12-22 12:20:39,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba8b651de/db9e3a02b16b405790c1b559d3efa54c/FLAGf765bd68f [2021-12-22 12:20:40,101 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 12:20:40,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_szymanski.i [2021-12-22 12:20:40,113 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba8b651de/db9e3a02b16b405790c1b559d3efa54c/FLAGf765bd68f [2021-12-22 12:20:40,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba8b651de/db9e3a02b16b405790c1b559d3efa54c [2021-12-22 12:20:40,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 12:20:40,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 12:20:40,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 12:20:40,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 12:20:40,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 12:20:40,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:20:40" (1/1) ... [2021-12-22 12:20:40,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7136b18f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:20:40, skipping insertion in model container [2021-12-22 12:20:40,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:20:40" (1/1) ... [2021-12-22 12:20:40,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 12:20:40,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 12:20:40,817 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_szymanski.i[23606,23619] [2021-12-22 12:20:40,901 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:20:40,909 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 12:20:40,929 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_szymanski.i[23606,23619] [2021-12-22 12:20:40,998 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:20:41,036 INFO L208 MainTranslator]: Completed translation [2021-12-22 12:20:41,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:20:41 WrapperNode [2021-12-22 12:20:41,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 12:20:41,037 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 12:20:41,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 12:20:41,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 12:20:41,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:20:41" (1/1) ... [2021-12-22 12:20:41,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:20:41" (1/1) ... [2021-12-22 12:20:41,098 INFO L137 Inliner]: procedures = 145, calls = 289, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 395 [2021-12-22 12:20:41,099 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 12:20:41,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 12:20:41,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 12:20:41,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 12:20:41,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:20:41" (1/1) ... [2021-12-22 12:20:41,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:20:41" (1/1) ... [2021-12-22 12:20:41,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:20:41" (1/1) ... [2021-12-22 12:20:41,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:20:41" (1/1) ... [2021-12-22 12:20:41,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:20:41" (1/1) ... [2021-12-22 12:20:41,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:20:41" (1/1) ... [2021-12-22 12:20:41,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:20:41" (1/1) ... [2021-12-22 12:20:41,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 12:20:41,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 12:20:41,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 12:20:41,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 12:20:41,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:20:41" (1/1) ... [2021-12-22 12:20:41,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:20:41,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:20:41,172 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) [2021-12-22 12:20:41,174 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 [2021-12-22 12:20:41,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 12:20:41,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 12:20:41,228 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 12:20:41,228 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 12:20:41,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 12:20:41,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 12:20:41,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 12:20:41,229 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2021-12-22 12:20:41,230 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2021-12-22 12:20:41,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 12:20:41,230 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2021-12-22 12:20:41,230 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2021-12-22 12:20:41,230 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-12-22 12:20:41,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-12-22 12:20:41,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 12:20:41,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 12:20:41,231 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2021-12-22 12:20:41,231 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2021-12-22 12:20:41,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 12:20:41,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 12:20:41,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 12:20:41,347 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 12:20:41,348 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 12:20:43,859 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 12:20:43,865 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 12:20:43,865 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 12:20:43,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:20:43 BoogieIcfgContainer [2021-12-22 12:20:43,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 12:20:43,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 12:20:43,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 12:20:43,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 12:20:43,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:20:40" (1/3) ... [2021-12-22 12:20:43,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fbb77ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:20:43, skipping insertion in model container [2021-12-22 12:20:43,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:20:41" (2/3) ... [2021-12-22 12:20:43,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fbb77ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:20:43, skipping insertion in model container [2021-12-22 12:20:43,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:20:43" (3/3) ... [2021-12-22 12:20:43,878 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_szymanski.i [2021-12-22 12:20:43,882 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 12:20:43,882 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 12:20:43,938 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 12:20:43,945 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 [2021-12-22 12:20:43,946 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 12:20:43,967 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 72 states have (on average 1.3333333333333333) internal successors, (96), 73 states have internal predecessors, (96), 32 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-22 12:20:43,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-22 12:20:43,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:20:43,979 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:20:43,980 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:20:43,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:20:43,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1875977801, now seen corresponding path program 1 times [2021-12-22 12:20:43,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:20:43,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661058860] [2021-12-22 12:20:43,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:20:43,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:20:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:44,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 12:20:44,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:44,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 12:20:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:44,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 12:20:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:44,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 12:20:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:44,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 12:20:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:44,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 12:20:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:44,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-22 12:20:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:44,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-22 12:20:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:44,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-22 12:20:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:44,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 12:20:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:44,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-22 12:20:44,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:44,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 12:20:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:44,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-22 12:20:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:44,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-22 12:20:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:44,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-22 12:20:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:44,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-22 12:20:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:44,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-22 12:20:44,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:44,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-22 12:20:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-12-22 12:20:44,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:20:44,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661058860] [2021-12-22 12:20:44,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661058860] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:20:44,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:20:44,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:20:44,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306707876] [2021-12-22 12:20:44,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:20:44,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:20:44,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:20:44,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:20:44,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:20:44,970 INFO L87 Difference]: Start difference. First operand has 111 states, 72 states have (on average 1.3333333333333333) internal successors, (96), 73 states have internal predecessors, (96), 32 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-22 12:20:45,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:20:45,021 INFO L93 Difference]: Finished difference Result 224 states and 356 transitions. [2021-12-22 12:20:45,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:20:45,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 120 [2021-12-22 12:20:45,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:20:45,042 INFO L225 Difference]: With dead ends: 224 [2021-12-22 12:20:45,042 INFO L226 Difference]: Without dead ends: 111 [2021-12-22 12:20:45,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:20:45,064 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 4 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 304 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 [2021-12-22 12:20:45,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 304 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:20:45,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-22 12:20:45,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2021-12-22 12:20:45,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 70 states have internal predecessors, (89), 32 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-22 12:20:45,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2021-12-22 12:20:45,118 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 120 [2021-12-22 12:20:45,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:20:45,119 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2021-12-22 12:20:45,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-22 12:20:45,119 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2021-12-22 12:20:45,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-22 12:20:45,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:20:45,124 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:20:45,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 12:20:45,124 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:20:45,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:20:45,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1912175905, now seen corresponding path program 1 times [2021-12-22 12:20:45,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:20:45,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703633873] [2021-12-22 12:20:45,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:20:45,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:20:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:45,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 12:20:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:45,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 12:20:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:45,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-22 12:20:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:45,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 12:20:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:45,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 12:20:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:45,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 12:20:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:45,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 12:20:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:45,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 12:20:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:45,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 12:20:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:45,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 12:20:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:45,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 12:20:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:45,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 12:20:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:45,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 12:20:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:45,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 12:20:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:45,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-22 12:20:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:45,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-22 12:20:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:45,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-22 12:20:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:45,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-22 12:20:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-12-22 12:20:45,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:20:45,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703633873] [2021-12-22 12:20:45,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703633873] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:20:45,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:20:45,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:20:45,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438461793] [2021-12-22 12:20:45,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:20:45,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:20:45,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:20:45,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:20:45,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:20:45,606 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-22 12:20:45,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:20:45,657 INFO L93 Difference]: Finished difference Result 215 states and 306 transitions. [2021-12-22 12:20:45,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:20:45,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 123 [2021-12-22 12:20:45,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:20:45,659 INFO L225 Difference]: With dead ends: 215 [2021-12-22 12:20:45,659 INFO L226 Difference]: Without dead ends: 110 [2021-12-22 12:20:45,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:20:45,660 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 1 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 297 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 [2021-12-22 12:20:45,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 297 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:20:45,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-22 12:20:45,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-12-22 12:20:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.267605633802817) internal successors, (90), 71 states have internal predecessors, (90), 32 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-22 12:20:45,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 154 transitions. [2021-12-22 12:20:45,679 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 154 transitions. Word has length 123 [2021-12-22 12:20:45,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:20:45,679 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 154 transitions. [2021-12-22 12:20:45,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-22 12:20:45,680 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 154 transitions. [2021-12-22 12:20:45,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-22 12:20:45,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:20:45,681 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:20:45,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 12:20:45,682 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:20:45,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:20:45,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1930143839, now seen corresponding path program 1 times [2021-12-22 12:20:45,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:20:45,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354392269] [2021-12-22 12:20:45,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:20:45,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:20:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:46,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 12:20:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:46,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 12:20:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:46,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 12:20:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:46,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 12:20:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:46,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 12:20:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:46,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 12:20:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:46,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 12:20:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:46,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 12:20:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:46,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 12:20:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:46,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 12:20:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:46,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 12:20:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:46,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-22 12:20:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:46,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-22 12:20:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:46,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-22 12:20:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:46,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-22 12:20:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:46,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 12:20:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:46,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 12:20:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:46,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-22 12:20:46,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-12-22 12:20:46,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:20:46,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354392269] [2021-12-22 12:20:46,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354392269] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:20:46,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147520437] [2021-12-22 12:20:46,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:20:46,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:20:46,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:20:46,126 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) [2021-12-22 12:20:46,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 12:20:47,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:47,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 4528 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 12:20:47,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:20:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-12-22 12:20:47,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 12:20:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-12-22 12:20:47,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147520437] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 12:20:47,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 12:20:47,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-12-22 12:20:47,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542049332] [2021-12-22 12:20:47,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 12:20:47,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:20:47,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:20:47,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:20:47,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:20:47,886 INFO L87 Difference]: Start difference. First operand 109 states and 154 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 1 states have call predecessors, (36), 1 states have call successors, (36) [2021-12-22 12:20:47,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:20:47,915 INFO L93 Difference]: Finished difference Result 219 states and 311 transitions. [2021-12-22 12:20:47,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:20:47,916 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 1 states have call predecessors, (36), 1 states have call successors, (36) Word has length 125 [2021-12-22 12:20:47,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:20:47,917 INFO L225 Difference]: With dead ends: 219 [2021-12-22 12:20:47,917 INFO L226 Difference]: Without dead ends: 113 [2021-12-22 12:20:47,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:20:47,919 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 3 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 297 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 [2021-12-22 12:20:47,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 297 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:20:47,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-22 12:20:47,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-12-22 12:20:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 75 states have internal predecessors, (94), 32 states have call successors, (32), 5 states have call predecessors, (32), 5 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-22 12:20:47,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 158 transitions. [2021-12-22 12:20:47,927 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 158 transitions. Word has length 125 [2021-12-22 12:20:47,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:20:47,927 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 158 transitions. [2021-12-22 12:20:47,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 1 states have call predecessors, (36), 1 states have call successors, (36) [2021-12-22 12:20:47,928 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 158 transitions. [2021-12-22 12:20:47,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-22 12:20:47,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:20:47,929 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 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] [2021-12-22 12:20:47,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 12:20:48,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:20:48,156 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:20:48,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:20:48,156 INFO L85 PathProgramCache]: Analyzing trace with hash -28203099, now seen corresponding path program 2 times [2021-12-22 12:20:48,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:20:48,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813569977] [2021-12-22 12:20:48,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:20:48,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:20:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:48,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 12:20:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:48,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-22 12:20:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:48,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 12:20:48,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:48,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 12:20:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:48,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 12:20:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:48,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 12:20:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:48,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 12:20:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:48,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-22 12:20:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:48,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 12:20:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:48,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 12:20:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:48,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 12:20:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:48,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 12:20:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:48,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 12:20:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:48,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-22 12:20:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:48,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-22 12:20:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:48,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-22 12:20:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:48,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-22 12:20:48,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:48,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-22 12:20:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2021-12-22 12:20:48,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:20:48,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813569977] [2021-12-22 12:20:48,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813569977] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:20:48,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116725059] [2021-12-22 12:20:48,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 12:20:48,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:20:48,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:20:48,659 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) [2021-12-22 12:20:48,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 12:20:50,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 12:20:50,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 12:20:50,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 4196 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 12:20:50,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:20:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2021-12-22 12:20:50,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:20:50,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116725059] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:20:50,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:20:50,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 12:20:50,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653798004] [2021-12-22 12:20:50,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:20:50,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 12:20:50,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:20:50,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 12:20:50,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:20:50,649 INFO L87 Difference]: Start difference. First operand 113 states and 158 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-22 12:20:50,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:20:50,670 INFO L93 Difference]: Finished difference Result 211 states and 302 transitions. [2021-12-22 12:20:50,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 12:20:50,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 129 [2021-12-22 12:20:50,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:20:50,678 INFO L225 Difference]: With dead ends: 211 [2021-12-22 12:20:50,678 INFO L226 Difference]: Without dead ends: 169 [2021-12-22 12:20:50,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:20:50,679 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 77 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 528 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 [2021-12-22 12:20:50,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 528 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:20:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-22 12:20:50,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-12-22 12:20:50,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 113 states have (on average 1.2920353982300885) internal successors, (146), 113 states have internal predecessors, (146), 45 states have call successors, (45), 10 states have call predecessors, (45), 10 states have return successors, (49), 45 states have call predecessors, (49), 45 states have call successors, (49) [2021-12-22 12:20:50,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 240 transitions. [2021-12-22 12:20:50,703 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 240 transitions. Word has length 129 [2021-12-22 12:20:50,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:20:50,704 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 240 transitions. [2021-12-22 12:20:50,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2021-12-22 12:20:50,705 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 240 transitions. [2021-12-22 12:20:50,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-12-22 12:20:50,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:20:50,707 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:20:50,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 12:20:50,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-22 12:20:50,936 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:20:50,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:20:50,936 INFO L85 PathProgramCache]: Analyzing trace with hash -993819535, now seen corresponding path program 1 times [2021-12-22 12:20:50,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:20:50,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865235030] [2021-12-22 12:20:50,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:20:50,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:20:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 12:20:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:20:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:20:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 12:20:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 12:20:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:20:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 12:20:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 12:20:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:20:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-22 12:20:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-22 12:20:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:20:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 12:20:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-22 12:20:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-22 12:20:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 12:20:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-22 12:20:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-22 12:20:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 12:20:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-22 12:20:51,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-22 12:20:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-22 12:20:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-22 12:20:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-22 12:20:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-22 12:20:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-22 12:20:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-12-22 12:20:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-22 12:20:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-12-22 12:20:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2021-12-22 12:20:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 979 trivial. 0 not checked. [2021-12-22 12:20:51,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:20:51,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865235030] [2021-12-22 12:20:51,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865235030] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:20:51,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229103098] [2021-12-22 12:20:51,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:20:51,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:20:51,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:20:51,544 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) [2021-12-22 12:20:51,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 12:20:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:53,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 4997 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 12:20:53,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:20:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 979 trivial. 0 not checked. [2021-12-22 12:20:53,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 12:20:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 979 trivial. 0 not checked. [2021-12-22 12:20:54,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229103098] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 12:20:54,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 12:20:54,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 10 [2021-12-22 12:20:54,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992941698] [2021-12-22 12:20:54,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 12:20:54,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 12:20:54,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:20:54,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 12:20:54,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-22 12:20:54,172 INFO L87 Difference]: Start difference. First operand 169 states and 240 transitions. Second operand has 10 states, 10 states have (on average 10.2) internal successors, (102), 6 states have internal predecessors, (102), 2 states have call successors, (62), 6 states have call predecessors, (62), 2 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2021-12-22 12:20:56,219 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 12:20:58,235 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 12:20:58,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:20:58,610 INFO L93 Difference]: Finished difference Result 354 states and 502 transitions. [2021-12-22 12:20:58,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 12:20:58,610 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.2) internal successors, (102), 6 states have internal predecessors, (102), 2 states have call successors, (62), 6 states have call predecessors, (62), 2 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) Word has length 206 [2021-12-22 12:20:58,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:20:58,612 INFO L225 Difference]: With dead ends: 354 [2021-12-22 12:20:58,612 INFO L226 Difference]: Without dead ends: 197 [2021-12-22 12:20:58,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 467 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-22 12:20:58,613 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 79 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 139 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-22 12:20:58,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 394 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 225 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2021-12-22 12:20:58,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-22 12:20:58,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 192. [2021-12-22 12:20:58,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 134 states have (on average 1.2611940298507462) internal successors, (169), 136 states have internal predecessors, (169), 45 states have call successors, (45), 10 states have call predecessors, (45), 12 states have return successors, (53), 45 states have call predecessors, (53), 45 states have call successors, (53) [2021-12-22 12:20:58,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 267 transitions. [2021-12-22 12:20:58,625 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 267 transitions. Word has length 206 [2021-12-22 12:20:58,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:20:58,625 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 267 transitions. [2021-12-22 12:20:58,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.2) internal successors, (102), 6 states have internal predecessors, (102), 2 states have call successors, (62), 6 states have call predecessors, (62), 2 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2021-12-22 12:20:58,625 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 267 transitions. [2021-12-22 12:20:58,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-22 12:20:58,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:20:58,627 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:20:58,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 12:20:58,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:20:58,851 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:20:58,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:20:58,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1193364367, now seen corresponding path program 2 times [2021-12-22 12:20:58,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:20:58,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592734880] [2021-12-22 12:20:58,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:20:58,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:20:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:59,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 12:20:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:59,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:20:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:59,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:20:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:59,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 12:20:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:59,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 12:20:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:59,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:20:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:59,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 12:20:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:59,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 12:20:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:59,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:20:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:59,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-22 12:20:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:59,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-22 12:20:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:59,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:20:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:59,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-22 12:20:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:59,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-22 12:20:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:59,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-22 12:20:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:59,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 12:20:59,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:20:59,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-22 12:20:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:00,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-22 12:21:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:00,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-22 12:21:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:00,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-22 12:21:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:00,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-22 12:21:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:00,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-22 12:21:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:00,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-22 12:21:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:00,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-12-22 12:21:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:00,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-22 12:21:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:00,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-12-22 12:21:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:00,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2021-12-22 12:21:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:00,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2021-12-22 12:21:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:00,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-22 12:21:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:00,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-12-22 12:21:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1078 trivial. 0 not checked. [2021-12-22 12:21:00,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:21:00,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592734880] [2021-12-22 12:21:00,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592734880] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:21:00,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744443181] [2021-12-22 12:21:00,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 12:21:00,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:21:00,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:21:00,042 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) [2021-12-22 12:21:00,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 12:21:02,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 12:21:02,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 12:21:02,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 4282 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 12:21:02,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:21:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-12-22 12:21:02,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 12:21:02,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744443181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:21:02,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 12:21:02,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2021-12-22 12:21:02,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129220446] [2021-12-22 12:21:02,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:21:02,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:21:02,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:21:02,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:21:02,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-12-22 12:21:02,670 INFO L87 Difference]: Start difference. First operand 192 states and 267 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2021-12-22 12:21:02,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:21:02,681 INFO L93 Difference]: Finished difference Result 344 states and 482 transitions. [2021-12-22 12:21:02,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:21:02,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 224 [2021-12-22 12:21:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:21:02,682 INFO L225 Difference]: With dead ends: 344 [2021-12-22 12:21:02,682 INFO L226 Difference]: Without dead ends: 192 [2021-12-22 12:21:02,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-12-22 12:21:02,684 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 0 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:21:02,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 298 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:21:02,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-22 12:21:02,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-12-22 12:21:02,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 134 states have (on average 1.2537313432835822) internal successors, (168), 136 states have internal predecessors, (168), 45 states have call successors, (45), 10 states have call predecessors, (45), 12 states have return successors, (53), 45 states have call predecessors, (53), 45 states have call successors, (53) [2021-12-22 12:21:02,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 266 transitions. [2021-12-22 12:21:02,693 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 266 transitions. Word has length 224 [2021-12-22 12:21:02,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:21:02,693 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 266 transitions. [2021-12-22 12:21:02,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2021-12-22 12:21:02,693 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 266 transitions. [2021-12-22 12:21:02,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-12-22 12:21:02,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:21:02,695 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 9, 9, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:21:02,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 12:21:02,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:21:02,915 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:21:02,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:21:02,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1496592282, now seen corresponding path program 1 times [2021-12-22 12:21:02,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:21:02,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637553360] [2021-12-22 12:21:02,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:21:02,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:21:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:03,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 12:21:03,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:21:04,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:21:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 12:21:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:21:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:21:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 12:21:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 12:21:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:21:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 12:21:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 12:21:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:21:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-22 12:21:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-22 12:21:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:21:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-22 12:21:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-22 12:21:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 12:21:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-22 12:21:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-22 12:21:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 12:21:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-22 12:21:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-22 12:21:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-22 12:21:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-22 12:21:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-22 12:21:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2021-12-22 12:21:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2021-12-22 12:21:04,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-12-22 12:21:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2021-12-22 12:21:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2021-12-22 12:21:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2021-12-22 12:21:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2021-12-22 12:21:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2021-12-22 12:21:04,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:21:04,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637553360] [2021-12-22 12:21:04,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637553360] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:21:04,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823160484] [2021-12-22 12:21:04,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:21:04,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:21:04,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:21:04,248 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) [2021-12-22 12:21:04,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 12:21:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:06,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 5430 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-22 12:21:06,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:21:07,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 374 proven. 21 refuted. 0 times theorem prover too weak. 808 trivial. 0 not checked. [2021-12-22 12:21:07,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 12:21:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 1167 trivial. 0 not checked. [2021-12-22 12:21:07,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823160484] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 12:21:07,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 12:21:07,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 26 [2021-12-22 12:21:07,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705383212] [2021-12-22 12:21:07,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 12:21:07,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-22 12:21:07,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:21:07,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-22 12:21:07,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-12-22 12:21:07,943 INFO L87 Difference]: Start difference. First operand 192 states and 266 transitions. Second operand has 26 states, 26 states have (on average 4.538461538461538) internal successors, (118), 21 states have internal predecessors, (118), 15 states have call successors, (62), 12 states have call predecessors, (62), 12 states have return successors, (61), 15 states have call predecessors, (61), 15 states have call successors, (61) [2021-12-22 12:21:09,963 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 12:21:11,995 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 12:21:14,004 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 12:21:16,024 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 12:21:21,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:21:21,646 INFO L93 Difference]: Finished difference Result 1037 states and 1615 transitions. [2021-12-22 12:21:21,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-12-22 12:21:21,647 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.538461538461538) internal successors, (118), 21 states have internal predecessors, (118), 15 states have call successors, (62), 12 states have call predecessors, (62), 12 states have return successors, (61), 15 states have call predecessors, (61), 15 states have call successors, (61) Word has length 244 [2021-12-22 12:21:21,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:21:21,652 INFO L225 Difference]: With dead ends: 1037 [2021-12-22 12:21:21,652 INFO L226 Difference]: Without dead ends: 878 [2021-12-22 12:21:21,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 568 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3902 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1769, Invalid=9787, Unknown=0, NotChecked=0, Total=11556 [2021-12-22 12:21:21,657 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 1102 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 1383 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 3921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1383 IncrementalHoareTripleChecker+Valid, 2534 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2021-12-22 12:21:21,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 1216 Invalid, 3921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1383 Valid, 2534 Invalid, 4 Unknown, 0 Unchecked, 10.9s Time] [2021-12-22 12:21:21,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-12-22 12:21:21,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 547. [2021-12-22 12:21:21,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 376 states have (on average 1.25) internal successors, (470), 381 states have internal predecessors, (470), 108 states have call successors, (108), 50 states have call predecessors, (108), 62 states have return successors, (178), 115 states have call predecessors, (178), 108 states have call successors, (178) [2021-12-22 12:21:21,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 756 transitions. [2021-12-22 12:21:21,696 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 756 transitions. Word has length 244 [2021-12-22 12:21:21,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:21:21,696 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 756 transitions. [2021-12-22 12:21:21,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.538461538461538) internal successors, (118), 21 states have internal predecessors, (118), 15 states have call successors, (62), 12 states have call predecessors, (62), 12 states have return successors, (61), 15 states have call predecessors, (61), 15 states have call successors, (61) [2021-12-22 12:21:21,697 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 756 transitions. [2021-12-22 12:21:21,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-12-22 12:21:21,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:21:21,701 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 9, 9, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:21:21,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 12:21:21,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:21:21,923 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:21:21,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:21:21,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1922354694, now seen corresponding path program 1 times [2021-12-22 12:21:21,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:21:21,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163587211] [2021-12-22 12:21:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:21:21,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:21:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:40,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 12:21:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:40,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:21:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:40,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:21:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:40,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-22 12:21:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:21:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:21:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 12:21:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 12:21:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:21:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 12:21:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 12:21:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:21:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-22 12:21:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-22 12:21:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 12:21:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-22 12:21:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-22 12:21:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-22 12:21:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-22 12:21:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-22 12:21:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 12:21:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-22 12:21:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-22 12:21:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-22 12:21:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-22 12:21:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-22 12:21:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2021-12-22 12:21:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2021-12-22 12:21:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-12-22 12:21:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2021-12-22 12:21:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2021-12-22 12:21:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2021-12-22 12:21:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2021-12-22 12:21:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1195 trivial. 0 not checked. [2021-12-22 12:21:41,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:21:41,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163587211] [2021-12-22 12:21:41,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163587211] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 12:21:41,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834299288] [2021-12-22 12:21:41,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:21:41,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 12:21:41,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:21:41,820 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) [2021-12-22 12:21:41,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 12:21:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:21:44,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 5576 conjuncts, 133 conjunts are in the unsatisfiable core [2021-12-22 12:21:44,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 12:21:45,941 INFO L387 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 10 treesize of output 8 [2021-12-22 12:21:46,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 12:21:46,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 12:21:46,829 INFO L353 Elim1Store]: treesize reduction 156, result has 41.1 percent of original size [2021-12-22 12:21:46,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 442 treesize of output 339 [2021-12-22 12:21:46,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 12:21:46,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 12:21:46,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 12:21:46,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-22 12:21:47,125 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-22 12:21:47,152 WARN L234 Elim1Store]: Array PQE input equivalent to false