./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more/buffer-series.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c2bbc92 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more/buffer-series.wvr.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 3dc053c284fdf37018599e5dbbde68f9fbdd25a5 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-05 21:32:31,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-05 21:32:31,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-05 21:32:31,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-05 21:32:31,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-05 21:32:31,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-05 21:32:31,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-05 21:32:31,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-05 21:32:31,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-05 21:32:31,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-05 21:32:31,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-05 21:32:31,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-05 21:32:31,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-05 21:32:31,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-05 21:32:31,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-05 21:32:31,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-05 21:32:31,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-05 21:32:31,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-05 21:32:31,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-05 21:32:31,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-05 21:32:31,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-05 21:32:31,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-05 21:32:31,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-05 21:32:31,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-05 21:32:31,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-05 21:32:31,236 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-05 21:32:31,237 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-05 21:32:31,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-05 21:32:31,238 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-05 21:32:31,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-05 21:32:31,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-05 21:32:31,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-05 21:32:31,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-05 21:32:31,243 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-05 21:32:31,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-05 21:32:31,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-05 21:32:31,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-05 21:32:31,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-05 21:32:31,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-05 21:32:31,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-05 21:32:31,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-05 21:32:31,249 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-05 21:32:31,277 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-05 21:32:31,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-05 21:32:31,279 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-05 21:32:31,280 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-05 21:32:31,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-05 21:32:31,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-05 21:32:31,285 INFO L138 SettingsManager]: * Use SBE=true [2021-10-05 21:32:31,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-05 21:32:31,285 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-05 21:32:31,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-05 21:32:31,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-05 21:32:31,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-05 21:32:31,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-05 21:32:31,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-05 21:32:31,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-05 21:32:31,287 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-05 21:32:31,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-05 21:32:31,288 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-05 21:32:31,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-05 21:32:31,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-05 21:32:31,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-05 21:32:31,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-05 21:32:31,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 21:32:31,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-05 21:32:31,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-05 21:32:31,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-05 21:32:31,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-05 21:32:31,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-05 21:32:31,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-05 21:32:31,301 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-05 21:32:31,302 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3dc053c284fdf37018599e5dbbde68f9fbdd25a5 [2021-10-05 21:32:31,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-05 21:32:31,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-05 21:32:31,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-05 21:32:31,758 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-05 21:32:31,760 INFO L275 PluginConnector]: CDTParser initialized [2021-10-05 21:32:31,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more/buffer-series.wvr.c [2021-10-05 21:32:31,847 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b14b3993b/2cb65489fe2840269c7d758b6c4cd5d8/FLAG0925de1ee [2021-10-05 21:32:32,488 INFO L306 CDTParser]: Found 1 translation units. [2021-10-05 21:32:32,489 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more/buffer-series.wvr.c [2021-10-05 21:32:32,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b14b3993b/2cb65489fe2840269c7d758b6c4cd5d8/FLAG0925de1ee [2021-10-05 21:32:32,843 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b14b3993b/2cb65489fe2840269c7d758b6c4cd5d8 [2021-10-05 21:32:32,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-05 21:32:32,857 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-05 21:32:32,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-05 21:32:32,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-05 21:32:32,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-05 21:32:32,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 09:32:32" (1/1) ... [2021-10-05 21:32:32,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f4452e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:32:32, skipping insertion in model container [2021-10-05 21:32:32,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 09:32:32" (1/1) ... [2021-10-05 21:32:32,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-05 21:32:32,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-05 21:32:33,070 WARN L612 FunctionHandler]: implicit declaration of function assume [2021-10-05 21:32:33,088 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more/buffer-series.wvr.c[3292,3305] [2021-10-05 21:32:33,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 21:32:33,106 INFO L203 MainTranslator]: Completed pre-run [2021-10-05 21:32:33,126 WARN L612 FunctionHandler]: implicit declaration of function assume [2021-10-05 21:32:33,138 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more/buffer-series.wvr.c[3292,3305] [2021-10-05 21:32:33,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 21:32:33,158 INFO L208 MainTranslator]: Completed translation [2021-10-05 21:32:33,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:32:33 WrapperNode [2021-10-05 21:32:33,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-05 21:32:33,160 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-05 21:32:33,160 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-05 21:32:33,160 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-05 21:32:33,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:32:33" (1/1) ... [2021-10-05 21:32:33,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:32:33" (1/1) ... [2021-10-05 21:32:33,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-05 21:32:33,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-05 21:32:33,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-05 21:32:33,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-05 21:32:33,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:32:33" (1/1) ... [2021-10-05 21:32:33,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:32:33" (1/1) ... [2021-10-05 21:32:33,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:32:33" (1/1) ... [2021-10-05 21:32:33,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:32:33" (1/1) ... [2021-10-05 21:32:33,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:32:33" (1/1) ... [2021-10-05 21:32:33,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:32:33" (1/1) ... [2021-10-05 21:32:33,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:32:33" (1/1) ... [2021-10-05 21:32:33,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-05 21:32:33,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-05 21:32:33,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-05 21:32:33,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-05 21:32:33,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:32:33" (1/1) ... [2021-10-05 21:32:33,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 21:32:33,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:32:33,357 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-05 21:32:33,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-05 21:32:33,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-05 21:32:33,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-05 21:32:33,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-05 21:32:33,411 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-05 21:32:33,411 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-05 21:32:33,411 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-05 21:32:33,412 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-05 21:32:33,412 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-05 21:32:33,412 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-05 21:32:33,412 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-10-05 21:32:33,412 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-10-05 21:32:33,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-05 21:32:33,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-05 21:32:33,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-05 21:32:33,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-05 21:32:33,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-05 21:32:33,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-05 21:32:33,413 INFO L130 BoogieDeclarations]: Found specification of procedure assume [2021-10-05 21:32:33,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-05 21:32:33,415 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-05 21:32:34,303 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-05 21:32:34,306 INFO L299 CfgBuilder]: Removed 37 assume(true) statements. [2021-10-05 21:32:34,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 09:32:34 BoogieIcfgContainer [2021-10-05 21:32:34,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-05 21:32:34,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-05 21:32:34,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-05 21:32:34,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-05 21:32:34,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 09:32:32" (1/3) ... [2021-10-05 21:32:34,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436013ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 09:32:34, skipping insertion in model container [2021-10-05 21:32:34,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:32:33" (2/3) ... [2021-10-05 21:32:34,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436013ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 09:32:34, skipping insertion in model container [2021-10-05 21:32:34,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 09:32:34" (3/3) ... [2021-10-05 21:32:34,322 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series.wvr.c [2021-10-05 21:32:34,332 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-05 21:32:34,332 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-05 21:32:34,333 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-05 21:32:34,333 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-05 21:32:34,400 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,401 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,401 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,401 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,402 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,402 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,402 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,402 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,403 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,403 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,404 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,404 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,405 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,405 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,405 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,405 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,406 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,406 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,407 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,407 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,408 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,408 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,408 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,409 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,410 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,411 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,411 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,411 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,411 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,412 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,412 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,413 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,413 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,413 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,414 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,414 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,414 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,414 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,421 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,422 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,422 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~ret11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,422 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,422 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,425 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,425 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,426 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,426 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,427 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,427 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,427 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,427 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,430 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,430 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~mem14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,430 WARN L313 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,431 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#t~post15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,431 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,432 WARN L313 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,439 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,439 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,440 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,440 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,441 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,441 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,441 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,441 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:32:34,454 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-10-05 21:32:34,509 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-05 21:32:34,517 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-05 21:32:34,517 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-05 21:32:34,537 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-05 21:32:34,550 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 208 transitions, 448 flow [2021-10-05 21:32:34,553 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 208 transitions, 448 flow [2021-10-05 21:32:34,555 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 202 places, 208 transitions, 448 flow [2021-10-05 21:32:34,678 INFO L129 PetriNetUnfolder]: 19/204 cut-off events. [2021-10-05 21:32:34,679 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-05 21:32:34,687 INFO L84 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 204 events. 19/204 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 101 event pairs, 0 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 173. Up to 2 conditions per place. [2021-10-05 21:32:34,693 INFO L116 LiptonReduction]: Number of co-enabled transitions 1100 [2021-10-05 21:32:44,785 INFO L131 LiptonReduction]: Checked pairs total: 2807 [2021-10-05 21:32:44,786 INFO L133 LiptonReduction]: Total number of compositions: 194 [2021-10-05 21:32:44,795 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 40 transitions, 112 flow [2021-10-05 21:32:44,835 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 325 states, 324 states have (on average 4.021604938271605) internal successors, (1303), 324 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:44,840 INFO L276 IsEmpty]: Start isEmpty. Operand has 325 states, 324 states have (on average 4.021604938271605) internal successors, (1303), 324 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:44,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-05 21:32:44,858 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:32:44,859 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:32:44,859 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-05 21:32:44,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:32:44,865 INFO L82 PathProgramCache]: Analyzing trace with hash -594704884, now seen corresponding path program 1 times [2021-10-05 21:32:44,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:32:44,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605514005] [2021-10-05 21:32:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:32:44,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:32:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:32:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:32:45,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:32:45,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605514005] [2021-10-05 21:32:45,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605514005] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:32:45,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:32:45,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-05 21:32:45,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831458109] [2021-10-05 21:32:45,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-05 21:32:45,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:32:45,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-05 21:32:45,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 21:32:45,384 INFO L87 Difference]: Start difference. First operand has 325 states, 324 states have (on average 4.021604938271605) internal successors, (1303), 324 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:45,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:32:45,500 INFO L93 Difference]: Finished difference Result 620 states and 2531 transitions. [2021-10-05 21:32:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-05 21:32:45,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-05 21:32:45,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:32:45,546 INFO L225 Difference]: With dead ends: 620 [2021-10-05 21:32:45,547 INFO L226 Difference]: Without dead ends: 591 [2021-10-05 21:32:45,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 21:32:45,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-10-05 21:32:45,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 441. [2021-10-05 21:32:45,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 4.054545454545455) internal successors, (1784), 440 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1784 transitions. [2021-10-05 21:32:45,681 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1784 transitions. Word has length 24 [2021-10-05 21:32:45,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:32:45,683 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 1784 transitions. [2021-10-05 21:32:45,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:45,683 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1784 transitions. [2021-10-05 21:32:45,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-05 21:32:45,694 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:32:45,695 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:32:45,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-05 21:32:45,695 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-05 21:32:45,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:32:45,697 INFO L82 PathProgramCache]: Analyzing trace with hash -48814226, now seen corresponding path program 1 times [2021-10-05 21:32:45,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:32:45,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333053044] [2021-10-05 21:32:45,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:32:45,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:32:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:32:45,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:32:45,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:32:45,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333053044] [2021-10-05 21:32:45,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333053044] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:32:45,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:32:45,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-05 21:32:45,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254129322] [2021-10-05 21:32:45,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 21:32:45,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:32:45,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 21:32:45,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:32:45,909 INFO L87 Difference]: Start difference. First operand 441 states and 1784 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:45,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:32:45,998 INFO L93 Difference]: Finished difference Result 663 states and 2612 transitions. [2021-10-05 21:32:45,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 21:32:45,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-05 21:32:46,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:32:46,008 INFO L225 Difference]: With dead ends: 663 [2021-10-05 21:32:46,008 INFO L226 Difference]: Without dead ends: 613 [2021-10-05 21:32:46,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:32:46,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-10-05 21:32:46,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 613. [2021-10-05 21:32:46,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 4.019607843137255) internal successors, (2460), 612 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:46,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 2460 transitions. [2021-10-05 21:32:46,050 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 2460 transitions. Word has length 26 [2021-10-05 21:32:46,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:32:46,050 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 2460 transitions. [2021-10-05 21:32:46,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:46,051 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 2460 transitions. [2021-10-05 21:32:46,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-05 21:32:46,055 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:32:46,055 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:32:46,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-05 21:32:46,057 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-05 21:32:46,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:32:46,068 INFO L82 PathProgramCache]: Analyzing trace with hash -597886002, now seen corresponding path program 1 times [2021-10-05 21:32:46,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:32:46,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076900671] [2021-10-05 21:32:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:32:46,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:32:46,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:32:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:32:46,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:32:46,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076900671] [2021-10-05 21:32:46,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076900671] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:32:46,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733009579] [2021-10-05 21:32:46,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:32:46,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:32:46,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:32:46,190 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:32:46,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-05 21:32:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:32:46,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-05 21:32:46,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:32:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:32:46,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733009579] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:32:46,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:32:46,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-10-05 21:32:46,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555824918] [2021-10-05 21:32:46,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 21:32:46,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:32:46,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 21:32:46,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:32:46,423 INFO L87 Difference]: Start difference. First operand 613 states and 2460 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:46,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:32:46,505 INFO L93 Difference]: Finished difference Result 1131 states and 4374 transitions. [2021-10-05 21:32:46,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-05 21:32:46,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-05 21:32:46,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:32:46,517 INFO L225 Difference]: With dead ends: 1131 [2021-10-05 21:32:46,518 INFO L226 Difference]: Without dead ends: 975 [2021-10-05 21:32:46,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-05 21:32:46,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-10-05 21:32:46,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 821. [2021-10-05 21:32:46,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 4.004878048780488) internal successors, (3284), 820 states have internal predecessors, (3284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:46,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 3284 transitions. [2021-10-05 21:32:46,606 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 3284 transitions. Word has length 26 [2021-10-05 21:32:46,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:32:46,607 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 3284 transitions. [2021-10-05 21:32:46,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:46,608 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 3284 transitions. [2021-10-05 21:32:46,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-05 21:32:46,613 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:32:46,613 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:32:46,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-05 21:32:46,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:32:46,828 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-05 21:32:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:32:46,830 INFO L82 PathProgramCache]: Analyzing trace with hash 839574795, now seen corresponding path program 1 times [2021-10-05 21:32:46,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:32:46,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069826603] [2021-10-05 21:32:46,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:32:46,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:32:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:32:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:32:46,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:32:46,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069826603] [2021-10-05 21:32:46,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069826603] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:32:46,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:32:46,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-05 21:32:46,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551033475] [2021-10-05 21:32:46,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 21:32:46,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:32:46,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 21:32:46,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:32:46,900 INFO L87 Difference]: Start difference. First operand 821 states and 3284 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:46,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:32:46,940 INFO L93 Difference]: Finished difference Result 1151 states and 4353 transitions. [2021-10-05 21:32:46,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 21:32:46,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-05 21:32:46,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:32:46,953 INFO L225 Difference]: With dead ends: 1151 [2021-10-05 21:32:46,954 INFO L226 Difference]: Without dead ends: 1071 [2021-10-05 21:32:46,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:32:46,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-10-05 21:32:46,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 907. [2021-10-05 21:32:46,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 3.9635761589403975) internal successors, (3591), 906 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 3591 transitions. [2021-10-05 21:32:47,029 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 3591 transitions. Word has length 28 [2021-10-05 21:32:47,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:32:47,029 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 3591 transitions. [2021-10-05 21:32:47,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:47,030 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 3591 transitions. [2021-10-05 21:32:47,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-05 21:32:47,035 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:32:47,035 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:32:47,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-05 21:32:47,036 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-05 21:32:47,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:32:47,037 INFO L82 PathProgramCache]: Analyzing trace with hash 253776433, now seen corresponding path program 1 times [2021-10-05 21:32:47,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:32:47,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747942847] [2021-10-05 21:32:47,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:32:47,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:32:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:32:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:32:47,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:32:47,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747942847] [2021-10-05 21:32:47,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747942847] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:32:47,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:32:47,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-05 21:32:47,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870579479] [2021-10-05 21:32:47,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 21:32:47,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:32:47,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 21:32:47,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:32:47,110 INFO L87 Difference]: Start difference. First operand 907 states and 3591 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:47,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:32:47,182 INFO L93 Difference]: Finished difference Result 1581 states and 5701 transitions. [2021-10-05 21:32:47,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-05 21:32:47,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-05 21:32:47,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:32:47,199 INFO L225 Difference]: With dead ends: 1581 [2021-10-05 21:32:47,199 INFO L226 Difference]: Without dead ends: 1429 [2021-10-05 21:32:47,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-05 21:32:47,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2021-10-05 21:32:47,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 995. [2021-10-05 21:32:47,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 3.943661971830986) internal successors, (3920), 994 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 3920 transitions. [2021-10-05 21:32:47,286 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 3920 transitions. Word has length 28 [2021-10-05 21:32:47,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:32:47,286 INFO L470 AbstractCegarLoop]: Abstraction has 995 states and 3920 transitions. [2021-10-05 21:32:47,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:47,291 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 3920 transitions. [2021-10-05 21:32:47,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-05 21:32:47,299 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:32:47,300 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:32:47,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-05 21:32:47,300 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-05 21:32:47,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:32:47,301 INFO L82 PathProgramCache]: Analyzing trace with hash 68670515, now seen corresponding path program 1 times [2021-10-05 21:32:47,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:32:47,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996558124] [2021-10-05 21:32:47,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:32:47,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:32:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:32:47,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 21:32:47,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:32:47,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996558124] [2021-10-05 21:32:47,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996558124] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:32:47,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:32:47,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-05 21:32:47,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799390411] [2021-10-05 21:32:47,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 21:32:47,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:32:47,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 21:32:47,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-05 21:32:47,409 INFO L87 Difference]: Start difference. First operand 995 states and 3920 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:47,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:32:47,528 INFO L93 Difference]: Finished difference Result 1709 states and 6386 transitions. [2021-10-05 21:32:47,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-05 21:32:47,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-05 21:32:47,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:32:47,546 INFO L225 Difference]: With dead ends: 1709 [2021-10-05 21:32:47,547 INFO L226 Difference]: Without dead ends: 1634 [2021-10-05 21:32:47,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-05 21:32:47,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2021-10-05 21:32:47,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 997. [2021-10-05 21:32:47,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 3.9387550200803214) internal successors, (3923), 996 states have internal predecessors, (3923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 3923 transitions. [2021-10-05 21:32:47,669 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 3923 transitions. Word has length 29 [2021-10-05 21:32:47,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:32:47,670 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 3923 transitions. [2021-10-05 21:32:47,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:47,674 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 3923 transitions. [2021-10-05 21:32:47,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-05 21:32:47,681 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:32:47,681 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:32:47,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-05 21:32:47,682 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-05 21:32:47,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:32:47,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1800010441, now seen corresponding path program 1 times [2021-10-05 21:32:47,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:32:47,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351854352] [2021-10-05 21:32:47,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:32:47,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:32:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:32:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 21:32:47,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:32:47,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351854352] [2021-10-05 21:32:47,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351854352] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:32:47,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:32:47,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-05 21:32:47,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629926795] [2021-10-05 21:32:47,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 21:32:47,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:32:47,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 21:32:47,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-05 21:32:47,776 INFO L87 Difference]: Start difference. First operand 997 states and 3923 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:47,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:32:47,858 INFO L93 Difference]: Finished difference Result 1281 states and 4837 transitions. [2021-10-05 21:32:47,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-05 21:32:47,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-05 21:32:47,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:32:47,871 INFO L225 Difference]: With dead ends: 1281 [2021-10-05 21:32:47,871 INFO L226 Difference]: Without dead ends: 1238 [2021-10-05 21:32:47,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-05 21:32:47,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-10-05 21:32:47,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 998. [2021-10-05 21:32:47,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 3.934804413239719) internal successors, (3923), 997 states have internal predecessors, (3923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:47,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 3923 transitions. [2021-10-05 21:32:47,950 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 3923 transitions. Word has length 29 [2021-10-05 21:32:47,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:32:47,952 INFO L470 AbstractCegarLoop]: Abstraction has 998 states and 3923 transitions. [2021-10-05 21:32:47,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:47,953 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 3923 transitions. [2021-10-05 21:32:47,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-05 21:32:47,957 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:32:47,958 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:32:47,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-05 21:32:47,959 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-05 21:32:47,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:32:47,960 INFO L82 PathProgramCache]: Analyzing trace with hash -557922877, now seen corresponding path program 1 times [2021-10-05 21:32:47,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:32:47,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041823647] [2021-10-05 21:32:47,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:32:47,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:32:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:32:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 21:32:48,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:32:48,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041823647] [2021-10-05 21:32:48,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041823647] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:32:48,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279784760] [2021-10-05 21:32:48,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:32:48,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:32:48,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:32:48,070 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:32:48,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-05 21:32:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:32:48,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-05 21:32:48,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:32:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 21:32:48,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279784760] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:32:48,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:32:48,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-10-05 21:32:48,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958895389] [2021-10-05 21:32:48,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-05 21:32:48,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:32:48,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-05 21:32:48,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-05 21:32:48,348 INFO L87 Difference]: Start difference. First operand 998 states and 3923 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:48,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:32:48,445 INFO L93 Difference]: Finished difference Result 1002 states and 3872 transitions. [2021-10-05 21:32:48,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-05 21:32:48,445 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-05 21:32:48,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:32:48,455 INFO L225 Difference]: With dead ends: 1002 [2021-10-05 21:32:48,455 INFO L226 Difference]: Without dead ends: 951 [2021-10-05 21:32:48,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-05 21:32:48,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-10-05 21:32:48,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 809. [2021-10-05 21:32:48,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.9344059405940595) internal successors, (3179), 808 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 3179 transitions. [2021-10-05 21:32:48,494 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 3179 transitions. Word has length 30 [2021-10-05 21:32:48,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:32:48,494 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 3179 transitions. [2021-10-05 21:32:48,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:48,495 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 3179 transitions. [2021-10-05 21:32:48,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-05 21:32:48,498 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:32:48,499 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:32:48,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-05 21:32:48,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-05 21:32:48,714 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-05 21:32:48,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:32:48,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1248427955, now seen corresponding path program 1 times [2021-10-05 21:32:48,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:32:48,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217162829] [2021-10-05 21:32:48,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:32:48,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:32:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:32:48,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 21:32:48,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:32:48,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217162829] [2021-10-05 21:32:48,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217162829] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:32:48,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351600212] [2021-10-05 21:32:48,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:32:48,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:32:48,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:32:48,836 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:32:48,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-05 21:32:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:32:48,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-05 21:32:48,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:32:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 21:32:49,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351600212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:32:49,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:32:49,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-10-05 21:32:49,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29328178] [2021-10-05 21:32:49,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-05 21:32:49,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:32:49,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-05 21:32:49,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-05 21:32:49,063 INFO L87 Difference]: Start difference. First operand 809 states and 3179 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:49,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:32:49,143 INFO L93 Difference]: Finished difference Result 841 states and 3175 transitions. [2021-10-05 21:32:49,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-05 21:32:49,143 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-05 21:32:49,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:32:49,152 INFO L225 Difference]: With dead ends: 841 [2021-10-05 21:32:49,152 INFO L226 Difference]: Without dead ends: 754 [2021-10-05 21:32:49,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-05 21:32:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-10-05 21:32:49,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2021-10-05 21:32:49,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.9322709163346614) internal successors, (2961), 753 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:49,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2961 transitions. [2021-10-05 21:32:49,190 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2961 transitions. Word has length 30 [2021-10-05 21:32:49,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:32:49,191 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2961 transitions. [2021-10-05 21:32:49,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:49,191 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2961 transitions. [2021-10-05 21:32:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-05 21:32:49,195 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:32:49,195 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:32:49,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-05 21:32:49,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:32:49,409 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-05 21:32:49,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:32:49,410 INFO L82 PathProgramCache]: Analyzing trace with hash -313532052, now seen corresponding path program 1 times [2021-10-05 21:32:49,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:32:49,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290154148] [2021-10-05 21:32:49,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:32:49,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:32:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:32:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-05 21:32:49,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:32:49,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290154148] [2021-10-05 21:32:49,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290154148] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:32:49,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:32:49,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-05 21:32:49,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999110134] [2021-10-05 21:32:49,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 21:32:49,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:32:49,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 21:32:49,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:32:49,491 INFO L87 Difference]: Start difference. First operand 754 states and 2961 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:49,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:32:49,533 INFO L93 Difference]: Finished difference Result 1560 states and 6130 transitions. [2021-10-05 21:32:49,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 21:32:49,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-05 21:32:49,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:32:49,550 INFO L225 Difference]: With dead ends: 1560 [2021-10-05 21:32:49,550 INFO L226 Difference]: Without dead ends: 1560 [2021-10-05 21:32:49,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:32:49,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-10-05 21:32:49,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 984. [2021-10-05 21:32:49,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 4.178026449643947) internal successors, (4107), 983 states have internal predecessors, (4107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:49,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 4107 transitions. [2021-10-05 21:32:49,606 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 4107 transitions. Word has length 33 [2021-10-05 21:32:49,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:32:49,606 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 4107 transitions. [2021-10-05 21:32:49,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:49,607 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 4107 transitions. [2021-10-05 21:32:49,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-05 21:32:49,611 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:32:49,611 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:32:49,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-05 21:32:49,612 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-05 21:32:49,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:32:49,612 INFO L82 PathProgramCache]: Analyzing trace with hash -862603828, now seen corresponding path program 1 times [2021-10-05 21:32:49,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:32:49,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18355590] [2021-10-05 21:32:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:32:49,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:32:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:32:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-05 21:32:49,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:32:49,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18355590] [2021-10-05 21:32:49,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18355590] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:32:49,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:32:49,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-05 21:32:49,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565446174] [2021-10-05 21:32:49,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 21:32:49,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:32:49,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 21:32:49,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:32:49,669 INFO L87 Difference]: Start difference. First operand 984 states and 4107 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:49,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:32:49,726 INFO L93 Difference]: Finished difference Result 1420 states and 6051 transitions. [2021-10-05 21:32:49,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 21:32:49,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-05 21:32:49,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:32:49,741 INFO L225 Difference]: With dead ends: 1420 [2021-10-05 21:32:49,741 INFO L226 Difference]: Without dead ends: 1420 [2021-10-05 21:32:49,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:32:49,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-10-05 21:32:49,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1202. [2021-10-05 21:32:49,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1201 states have (on average 4.228975853455454) internal successors, (5079), 1201 states have internal predecessors, (5079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:49,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 5079 transitions. [2021-10-05 21:32:49,797 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 5079 transitions. Word has length 33 [2021-10-05 21:32:49,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:32:49,797 INFO L470 AbstractCegarLoop]: Abstraction has 1202 states and 5079 transitions. [2021-10-05 21:32:49,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:32:49,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 5079 transitions. [2021-10-05 21:32:49,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-05 21:32:49,803 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:32:49,803 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:32:49,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-05 21:32:49,803 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-05 21:32:49,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:32:49,804 INFO L82 PathProgramCache]: Analyzing trace with hash 198338350, now seen corresponding path program 1 times [2021-10-05 21:32:49,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:32:49,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310746229] [2021-10-05 21:32:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:32:49,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:32:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:32:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:32:52,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:32:52,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310746229] [2021-10-05 21:32:52,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310746229] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:32:52,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112031714] [2021-10-05 21:32:52,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:32:52,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:32:52,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:32:52,775 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:32:52,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-05 21:32:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:32:52,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 69 conjunts are in the unsatisfiable core [2021-10-05 21:32:52,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:32:53,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:32:53,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:32:53,232 INFO L354 Elim1Store]: treesize reduction 506, result has 10.3 percent of original size [2021-10-05 21:32:53,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 378 treesize of output 403 [2021-10-05 21:32:56,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:32:56,254 INFO L354 Elim1Store]: treesize reduction 164, result has 34.1 percent of original size [2021-10-05 21:32:56,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 5 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 31 case distinctions, treesize of input 92 treesize of output 158 [2021-10-05 21:32:57,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-05 21:32:57,359 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-05 21:32:57,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 47 [2021-10-05 21:32:57,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-05 21:32:57,822 INFO L354 Elim1Store]: treesize reduction 112, result has 25.3 percent of original size [2021-10-05 21:32:57,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 65 [2021-10-05 21:32:58,235 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-10-05 21:32:58,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 54 [2021-10-05 21:32:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 21:32:58,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112031714] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:32:58,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:32:58,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 27 [2021-10-05 21:32:58,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001833259] [2021-10-05 21:32:58,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-05 21:32:58,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:32:58,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-05 21:32:58,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-10-05 21:32:58,555 INFO L87 Difference]: Start difference. First operand 1202 states and 5079 transitions. Second operand has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:33:02,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:33:02,753 INFO L93 Difference]: Finished difference Result 3322 states and 13804 transitions. [2021-10-05 21:33:02,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-05 21:33:02,754 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-05 21:33:02,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:33:02,813 INFO L225 Difference]: With dead ends: 3322 [2021-10-05 21:33:02,813 INFO L226 Difference]: Without dead ends: 3293 [2021-10-05 21:33:02,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 3890.1ms TimeCoverageRelationStatistics Valid=184, Invalid=1622, Unknown=0, NotChecked=0, Total=1806 [2021-10-05 21:33:02,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3293 states. [2021-10-05 21:33:02,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3293 to 1722. [2021-10-05 21:33:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1721 states have (on average 4.182452062754213) internal successors, (7198), 1721 states have internal predecessors, (7198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:33:02,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 7198 transitions. [2021-10-05 21:33:02,928 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 7198 transitions. Word has length 35 [2021-10-05 21:33:02,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:33:02,928 INFO L470 AbstractCegarLoop]: Abstraction has 1722 states and 7198 transitions. [2021-10-05 21:33:02,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:33:02,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 7198 transitions. [2021-10-05 21:33:02,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-05 21:33:02,937 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:33:02,937 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:33:02,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-05 21:33:03,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-05 21:33:03,151 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-05 21:33:03,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:33:03,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1889348708, now seen corresponding path program 2 times [2021-10-05 21:33:03,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:33:03,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315876857] [2021-10-05 21:33:03,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:33:03,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:33:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:33:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:33:05,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:33:05,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315876857] [2021-10-05 21:33:05,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315876857] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:33:05,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869360739] [2021-10-05 21:33:05,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:33:05,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:33:05,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:33:05,205 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:33:05,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-05 21:33:05,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:33:05,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:33:05,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-05 21:33:05,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:33:05,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:05,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:05,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:05,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:05,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-10-05 21:33:06,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-05 21:33:06,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-10-05 21:33:07,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-05 21:33:07,057 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-05 21:33:07,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 44 [2021-10-05 21:33:07,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-05 21:33:07,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-05 21:33:07,615 INFO L354 Elim1Store]: treesize reduction 120, result has 20.0 percent of original size [2021-10-05 21:33:07,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 65 [2021-10-05 21:33:07,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-05 21:33:07,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-05 21:33:07,929 INFO L354 Elim1Store]: treesize reduction 120, result has 20.0 percent of original size [2021-10-05 21:33:07,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 60 [2021-10-05 21:33:08,339 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-10-05 21:33:08,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 52 [2021-10-05 21:33:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:33:08,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869360739] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:33:08,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:33:08,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2021-10-05 21:33:08,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886120442] [2021-10-05 21:33:08,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-05 21:33:08,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:33:08,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-05 21:33:08,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-10-05 21:33:08,509 INFO L87 Difference]: Start difference. First operand 1722 states and 7198 transitions. Second operand has 30 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:33:12,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:33:12,989 INFO L93 Difference]: Finished difference Result 3672 states and 15238 transitions. [2021-10-05 21:33:12,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-05 21:33:12,990 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-05 21:33:12,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:33:13,013 INFO L225 Difference]: With dead ends: 3672 [2021-10-05 21:33:13,014 INFO L226 Difference]: Without dead ends: 3643 [2021-10-05 21:33:13,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 4235.5ms TimeCoverageRelationStatistics Valid=258, Invalid=1904, Unknown=0, NotChecked=0, Total=2162 [2021-10-05 21:33:13,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3643 states. [2021-10-05 21:33:13,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3643 to 2369. [2021-10-05 21:33:13,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2369 states, 2368 states have (on average 4.139780405405405) internal successors, (9803), 2368 states have internal predecessors, (9803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:33:13,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 9803 transitions. [2021-10-05 21:33:13,203 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 9803 transitions. Word has length 35 [2021-10-05 21:33:13,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:33:13,204 INFO L470 AbstractCegarLoop]: Abstraction has 2369 states and 9803 transitions. [2021-10-05 21:33:13,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:33:13,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 9803 transitions. [2021-10-05 21:33:13,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-05 21:33:13,215 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:33:13,215 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:33:13,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-05 21:33:13,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:33:13,431 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-05 21:33:13,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:33:13,432 INFO L82 PathProgramCache]: Analyzing trace with hash -839311784, now seen corresponding path program 3 times [2021-10-05 21:33:13,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:33:13,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798680657] [2021-10-05 21:33:13,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:33:13,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:33:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:33:15,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:33:15,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:33:15,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798680657] [2021-10-05 21:33:15,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798680657] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:33:15,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689399838] [2021-10-05 21:33:15,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:33:15,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:33:15,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:33:15,898 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:33:15,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-05 21:33:16,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-05 21:33:16,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:33:16,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 85 conjunts are in the unsatisfiable core [2021-10-05 21:33:16,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:33:16,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:16,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:16,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:16,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:16,491 INFO L354 Elim1Store]: treesize reduction 446, result has 10.6 percent of original size [2021-10-05 21:33:16,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 63 [2021-10-05 21:33:16,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-05 21:33:17,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:17,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:17,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:17,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:17,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:17,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:17,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:17,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:17,638 INFO L354 Elim1Store]: treesize reduction 264, result has 12.3 percent of original size [2021-10-05 21:33:17,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 8 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 74 treesize of output 111 [2021-10-05 21:33:19,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-05 21:33:19,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:19,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:19,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:19,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:19,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:19,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:19,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:19,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:19,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:19,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:19,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:19,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:19,746 INFO L354 Elim1Store]: treesize reduction 176, result has 31.5 percent of original size [2021-10-05 21:33:19,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 13 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 32 case distinctions, treesize of input 84 treesize of output 144 [2021-10-05 21:33:20,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-05 21:33:20,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-10-05 21:33:21,104 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-10-05 21:33:21,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 44 [2021-10-05 21:33:21,375 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-10-05 21:33:21,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 44 [2021-10-05 21:33:22,249 INFO L354 Elim1Store]: treesize reduction 138, result has 16.9 percent of original size [2021-10-05 21:33:22,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 79 [2021-10-05 21:33:22,667 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-10-05 21:33:22,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 38 [2021-10-05 21:33:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:33:22,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689399838] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:33:22,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:33:22,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 29 [2021-10-05 21:33:22,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516117527] [2021-10-05 21:33:22,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-05 21:33:22,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:33:22,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-05 21:33:22,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-10-05 21:33:22,756 INFO L87 Difference]: Start difference. First operand 2369 states and 9803 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:33:40,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:33:40,129 INFO L93 Difference]: Finished difference Result 5077 states and 21165 transitions. [2021-10-05 21:33:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-05 21:33:40,130 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-05 21:33:40,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:33:40,160 INFO L225 Difference]: With dead ends: 5077 [2021-10-05 21:33:40,160 INFO L226 Difference]: Without dead ends: 5048 [2021-10-05 21:33:40,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 7096.2ms TimeCoverageRelationStatistics Valid=319, Invalid=2543, Unknown=0, NotChecked=0, Total=2862 [2021-10-05 21:33:40,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5048 states. [2021-10-05 21:33:40,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5048 to 2126. [2021-10-05 21:33:40,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 4.145882352941176) internal successors, (8810), 2125 states have internal predecessors, (8810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:33:40,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 8810 transitions. [2021-10-05 21:33:40,305 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 8810 transitions. Word has length 35 [2021-10-05 21:33:40,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:33:40,305 INFO L470 AbstractCegarLoop]: Abstraction has 2126 states and 8810 transitions. [2021-10-05 21:33:40,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:33:40,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 8810 transitions. [2021-10-05 21:33:40,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-05 21:33:40,315 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:33:40,315 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:33:40,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-05 21:33:40,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-05 21:33:40,530 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-10-05 21:33:40,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:33:40,531 INFO L82 PathProgramCache]: Analyzing trace with hash -340879716, now seen corresponding path program 4 times [2021-10-05 21:33:40,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:33:40,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652587788] [2021-10-05 21:33:40,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:33:40,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:33:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:33:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:33:43,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:33:43,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652587788] [2021-10-05 21:33:43,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652587788] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:33:43,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315602643] [2021-10-05 21:33:43,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:33:43,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:33:43,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:33:43,450 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:33:43,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-05 21:33:43,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:33:43,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:33:43,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-05 21:33:43,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:33:44,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:44,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:44,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:44,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-05 21:33:44,192 INFO L354 Elim1Store]: treesize reduction 446, result has 10.6 percent of original size [2021-10-05 21:33:44,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 63 [2021-10-05 21:33:45,269 INFO L354 Elim1Store]: treesize reduction 204, result has 29.4 percent of original size [2021-10-05 21:33:45,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 74 treesize of output 140 [2021-10-05 21:33:46,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-05 21:33:46,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 118 [2021-10-05 21:33:47,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-05 21:33:47,542 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-05 21:33:47,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 114 [2021-10-05 21:33:47,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-05 21:33:47,962 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-05 21:33:47,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 89 [2021-10-05 21:33:49,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 21:33:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:33:50,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315602643] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:33:50,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:33:50,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 34 [2021-10-05 21:33:50,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737617187] [2021-10-05 21:33:50,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-05 21:33:50,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:33:50,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-05 21:33:50,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2021-10-05 21:33:50,238 INFO L87 Difference]: Start difference. First operand 2126 states and 8810 transitions. Second operand has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:34:13,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:34:13,932 INFO L93 Difference]: Finished difference Result 10450 states and 41345 transitions. [2021-10-05 21:34:13,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-10-05 21:34:13,932 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-05 21:34:13,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:34:13,932 INFO L225 Difference]: With dead ends: 10450 [2021-10-05 21:34:13,932 INFO L226 Difference]: Without dead ends: 0 [2021-10-05 21:34:13,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2734 ImplicationChecksByTransitivity, 15279.6ms TimeCoverageRelationStatistics Valid=1081, Invalid=8621, Unknown=0, NotChecked=0, Total=9702 [2021-10-05 21:34:13,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-05 21:34:13,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-05 21:34:13,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:34:13,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-05 21:34:13,937 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2021-10-05 21:34:13,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:34:13,937 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-05 21:34:13,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:34:13,937 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-05 21:34:13,937 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-05 21:34:13,940 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-05 21:34:13,940 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-05 21:34:13,940 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-05 21:34:13,941 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-05 21:34:13,941 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATION [2021-10-05 21:34:13,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-05 21:34:14,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-05 21:34:14,163 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-05 21:34:14,163 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-05 21:34:14,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 09:34:14 BasicIcfg [2021-10-05 21:34:14,167 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-05 21:34:14,167 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-05 21:34:14,167 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-05 21:34:14,168 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-05 21:34:14,169 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 09:32:34" (3/4) ... [2021-10-05 21:34:14,172 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-05 21:34:14,180 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-05 21:34:14,180 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-05 21:34:14,180 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-05 21:34:14,181 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread4 [2021-10-05 21:34:14,189 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 26 nodes and edges [2021-10-05 21:34:14,189 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-05 21:34:14,190 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-05 21:34:14,190 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-05 21:34:14,258 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-05 21:34:14,262 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-05 21:34:14,263 INFO L168 Benchmark]: Toolchain (without parser) took 101413.35 ms. Allocated memory was 62.9 MB in the beginning and 295.7 MB in the end (delta: 232.8 MB). Free memory was 38.7 MB in the beginning and 118.3 MB in the end (delta: -79.6 MB). Peak memory consumption was 153.5 MB. Max. memory is 16.1 GB. [2021-10-05 21:34:14,264 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 46.1 MB. Free memory was 23.3 MB in the beginning and 23.3 MB in the end (delta: 31.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-05 21:34:14,265 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.94 ms. Allocated memory is still 62.9 MB. Free memory was 38.3 MB in the beginning and 42.1 MB in the end (delta: -3.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. [2021-10-05 21:34:14,266 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.87 ms. Allocated memory is still 62.9 MB. Free memory was 42.1 MB in the beginning and 39.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 21:34:14,266 INFO L168 Benchmark]: Boogie Preprocessor took 82.33 ms. Allocated memory is still 62.9 MB. Free memory was 39.7 MB in the beginning and 37.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 21:34:14,269 INFO L168 Benchmark]: RCFGBuilder took 1003.08 ms. Allocated memory is still 62.9 MB. Free memory was 37.9 MB in the beginning and 40.9 MB in the end (delta: -3.1 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. [2021-10-05 21:34:14,270 INFO L168 Benchmark]: TraceAbstraction took 99853.50 ms. Allocated memory was 62.9 MB in the beginning and 295.7 MB in the end (delta: 232.8 MB). Free memory was 40.4 MB in the beginning and 122.9 MB in the end (delta: -82.5 MB). Peak memory consumption was 150.6 MB. Max. memory is 16.1 GB. [2021-10-05 21:34:14,270 INFO L168 Benchmark]: Witness Printer took 95.03 ms. Allocated memory is still 295.7 MB. Free memory was 122.5 MB in the beginning and 118.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-05 21:34:14,275 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 46.1 MB. Free memory was 23.3 MB in the beginning and 23.3 MB in the end (delta: 31.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 300.94 ms. Allocated memory is still 62.9 MB. Free memory was 38.3 MB in the beginning and 42.1 MB in the end (delta: -3.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 64.87 ms. Allocated memory is still 62.9 MB. Free memory was 42.1 MB in the beginning and 39.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 82.33 ms. Allocated memory is still 62.9 MB. Free memory was 39.7 MB in the beginning and 37.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1003.08 ms. Allocated memory is still 62.9 MB. Free memory was 37.9 MB in the beginning and 40.9 MB in the end (delta: -3.1 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 99853.50 ms. Allocated memory was 62.9 MB in the beginning and 295.7 MB in the end (delta: 232.8 MB). Free memory was 40.4 MB in the beginning and 122.9 MB in the end (delta: -82.5 MB). Peak memory consumption was 150.6 MB. Max. memory is 16.1 GB. * Witness Printer took 95.03 ms. Allocated memory is still 295.7 MB. Free memory was 122.5 MB in the beginning and 118.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 10232.7ms, 202 PlacesBefore, 46 PlacesAfterwards, 208 TransitionsBefore, 40 TransitionsAfterwards, 1100 CoEnabledTransitionPairs, 7 FixpointIterations, 137 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 18 TrivialYvCompositions, 8 ConcurrentYvCompositions, 12 ChoiceCompositions, 194 TotalNumberOfCompositions, 2807 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1998, positive: 1892, positive conditional: 0, positive unconditional: 1892, negative: 106, negative conditional: 0, negative unconditional: 106, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 731, positive: 710, positive conditional: 0, positive unconditional: 710, negative: 21, negative conditional: 0, negative unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 731, positive: 698, positive conditional: 0, positive unconditional: 698, negative: 33, negative conditional: 0, negative unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 33, positive: 12, positive conditional: 0, positive unconditional: 12, negative: 21, negative conditional: 0, negative unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 125, positive: 42, positive conditional: 0, positive unconditional: 42, negative: 83, negative conditional: 0, negative unconditional: 83, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1998, positive: 1182, positive conditional: 0, positive unconditional: 1182, negative: 85, negative conditional: 0, negative unconditional: 85, unknown: 731, unknown conditional: 0, unknown unconditional: 731] , Statistics on independence cache: Total cache size (in pairs): 160, Positive cache size: 152, Positive conditional cache size: 0, Positive unconditional cache size: 152, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 116]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 212 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 99652.9ms, OverallIterations: 15, TraceHistogramMax: 1, EmptinessCheckTime: 111.1ms, AutomataDifference: 50987.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10318.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 569 SDtfs, 2827 SDslu, 3402 SDs, 0 SdLazy, 9532 SolverSat, 686 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 25817.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 499 GetRequests, 221 SyntacticMatches, 4 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3870 ImplicationChecksByTransitivity, 30688.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2369occurred in iteration=13, InterpolantAutomatonStates: 202, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1231.1ms AutomataMinimizationTime, 15 MinimizatonAttempts, 8482 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 199.9ms SsaConstructionTime, 1278.6ms SatisfiabilityAnalysisTime, 32503.1ms InterpolantComputationTime, 682 NumberOfCodeBlocks, 682 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 660 ConstructedInterpolants, 43 QuantifiedInterpolants, 17729 SizeOfPredicates, 155 NumberOfNonLiveVariables, 2034 ConjunctsInSsa, 335 ConjunctsInUnsatCore, 22 InterpolantComputations, 8 PerfectInterpolantSequences, 38/97 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-05 21:34:14,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...