./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-wmm/safe020_pso.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 997cd7c3 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-wmm/safe020_pso.opt.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 49b5fd9c76ac6ad95191b3c7b3f7f12fe89c1f9b .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-997cd7c-m [2021-09-22 14:50:50,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-09-22 14:50:50,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-09-22 14:50:50,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-09-22 14:50:50,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-09-22 14:50:50,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-09-22 14:50:50,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-09-22 14:50:50,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-09-22 14:50:50,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-09-22 14:50:50,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-09-22 14:50:50,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-09-22 14:50:50,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-09-22 14:50:50,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-09-22 14:50:50,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-09-22 14:50:50,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-09-22 14:50:50,143 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-09-22 14:50:50,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-09-22 14:50:50,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-09-22 14:50:50,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-09-22 14:50:50,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-09-22 14:50:50,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-09-22 14:50:50,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-09-22 14:50:50,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-09-22 14:50:50,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-09-22 14:50:50,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-09-22 14:50:50,152 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-09-22 14:50:50,152 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-09-22 14:50:50,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-09-22 14:50:50,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-09-22 14:50:50,158 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-09-22 14:50:50,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-09-22 14:50:50,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-09-22 14:50:50,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-09-22 14:50:50,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-09-22 14:50:50,163 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-09-22 14:50:50,164 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-09-22 14:50:50,164 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-09-22 14:50:50,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-09-22 14:50:50,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-09-22 14:50:50,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-09-22 14:50:50,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-09-22 14:50:50,167 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-09-22 14:50:50,197 INFO L113 SettingsManager]: Loading preferences was successful [2021-09-22 14:50:50,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-09-22 14:50:50,199 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-09-22 14:50:50,199 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-09-22 14:50:50,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-09-22 14:50:50,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-09-22 14:50:50,201 INFO L138 SettingsManager]: * Use SBE=true [2021-09-22 14:50:50,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-09-22 14:50:50,201 INFO L138 SettingsManager]: * sizeof long=4 [2021-09-22 14:50:50,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-09-22 14:50:50,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-09-22 14:50:50,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-09-22 14:50:50,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-09-22 14:50:50,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-09-22 14:50:50,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-09-22 14:50:50,203 INFO L138 SettingsManager]: * sizeof long double=12 [2021-09-22 14:50:50,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-09-22 14:50:50,203 INFO L138 SettingsManager]: * Use constant arrays=true [2021-09-22 14:50:50,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-09-22 14:50:50,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-09-22 14:50:50,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-09-22 14:50:50,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-09-22 14:50:50,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-09-22 14:50:50,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-09-22 14:50:50,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-09-22 14:50:50,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-09-22 14:50:50,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-09-22 14:50:50,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-09-22 14:50:50,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-09-22 14:50:50,205 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-09-22 14:50:50,205 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49b5fd9c76ac6ad95191b3c7b3f7f12fe89c1f9b [2021-09-22 14:50:50,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-09-22 14:50:50,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-09-22 14:50:50,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-09-22 14:50:50,470 INFO L271 PluginConnector]: Initializing CDTParser... [2021-09-22 14:50:50,471 INFO L275 PluginConnector]: CDTParser initialized [2021-09-22 14:50:50,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe020_pso.opt.i [2021-09-22 14:50:50,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb722f448/abe509b2bbd1464782ed0fd62c4c1ea0/FLAG3fb6876a2 [2021-09-22 14:50:50,946 INFO L306 CDTParser]: Found 1 translation units. [2021-09-22 14:50:50,946 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe020_pso.opt.i [2021-09-22 14:50:50,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb722f448/abe509b2bbd1464782ed0fd62c4c1ea0/FLAG3fb6876a2 [2021-09-22 14:50:50,964 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb722f448/abe509b2bbd1464782ed0fd62c4c1ea0 [2021-09-22 14:50:50,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-09-22 14:50:50,969 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-09-22 14:50:50,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-09-22 14:50:50,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-09-22 14:50:50,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-09-22 14:50:50,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.09 02:50:50" (1/1) ... [2021-09-22 14:50:50,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2578e452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:50:50, skipping insertion in model container [2021-09-22 14:50:50,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.09 02:50:50" (1/1) ... [2021-09-22 14:50:50,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-09-22 14:50:51,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-09-22 14:50:51,149 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe020_pso.opt.i[949,962] [2021-09-22 14:50:51,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-09-22 14:50:51,293 INFO L203 MainTranslator]: Completed pre-run [2021-09-22 14:50:51,302 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe020_pso.opt.i[949,962] [2021-09-22 14:50:51,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-09-22 14:50:51,370 INFO L208 MainTranslator]: Completed translation [2021-09-22 14:50:51,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:50:51 WrapperNode [2021-09-22 14:50:51,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-09-22 14:50:51,372 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-09-22 14:50:51,373 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-09-22 14:50:51,373 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-09-22 14:50:51,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:50:51" (1/1) ... [2021-09-22 14:50:51,401 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:50:51" (1/1) ... [2021-09-22 14:50:51,420 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-09-22 14:50:51,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-09-22 14:50:51,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-09-22 14:50:51,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-09-22 14:50:51,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:50:51" (1/1) ... [2021-09-22 14:50:51,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:50:51" (1/1) ... [2021-09-22 14:50:51,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:50:51" (1/1) ... [2021-09-22 14:50:51,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:50:51" (1/1) ... [2021-09-22 14:50:51,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:50:51" (1/1) ... [2021-09-22 14:50:51,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:50:51" (1/1) ... [2021-09-22 14:50:51,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:50:51" (1/1) ... [2021-09-22 14:50:51,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-09-22 14:50:51,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-09-22 14:50:51,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-09-22 14:50:51,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-09-22 14:50:51,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:50:51" (1/1) ... [2021-09-22 14:50:51,465 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-09-22 14:50:51,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:50:51,482 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-09-22 14:50:51,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-09-22 14:50:51,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-09-22 14:50:51,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-09-22 14:50:51,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-09-22 14:50:51,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-09-22 14:50:51,542 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-09-22 14:50:51,542 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-09-22 14:50:51,542 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-09-22 14:50:51,542 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-09-22 14:50:51,543 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-09-22 14:50:51,543 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-09-22 14:50:51,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-09-22 14:50:51,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-09-22 14:50:51,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-09-22 14:50:51,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-09-22 14:50:51,544 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-09-22 14:50:51,807 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-09-22 14:50:51,807 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-09-22 14:50:51,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.09 02:50:51 BoogieIcfgContainer [2021-09-22 14:50:51,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-09-22 14:50:51,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-09-22 14:50:51,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-09-22 14:50:51,812 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-09-22 14:50:51,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.09 02:50:50" (1/3) ... [2021-09-22 14:50:51,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e0a54d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.09 02:50:51, skipping insertion in model container [2021-09-22 14:50:51,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:50:51" (2/3) ... [2021-09-22 14:50:51,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e0a54d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.09 02:50:51, skipping insertion in model container [2021-09-22 14:50:51,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.09 02:50:51" (3/3) ... [2021-09-22 14:50:51,814 INFO L111 eAbstractionObserver]: Analyzing ICFG safe020_pso.opt.i [2021-09-22 14:50:51,818 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-09-22 14:50:51,818 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-09-22 14:50:51,818 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-09-22 14:50:51,818 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-09-22 14:50:51,837 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,837 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,837 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,837 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,838 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,838 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,838 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,838 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,838 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,838 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,839 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,839 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,839 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,839 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,839 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,839 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,839 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,840 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,840 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,840 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,840 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,840 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,840 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,840 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,841 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,841 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,841 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,841 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,841 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,841 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,842 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,842 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,842 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,842 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,842 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,842 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,845 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,845 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,845 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,845 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,848 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,849 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,849 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,849 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,851 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,851 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,851 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,851 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:50:51,852 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-09-22 14:50:51,893 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-09-22 14:50:51,897 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 [2021-09-22 14:50:51,898 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-09-22 14:50:51,906 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-09-22 14:50:51,912 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 82 transitions, 179 flow [2021-09-22 14:50:51,914 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 82 transitions, 179 flow [2021-09-22 14:50:51,915 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 82 transitions, 179 flow [2021-09-22 14:50:51,944 INFO L129 PetriNetUnfolder]: 2/79 cut-off events. [2021-09-22 14:50:51,945 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-09-22 14:50:51,947 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 79 events. 2/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 62. Up to 2 conditions per place. [2021-09-22 14:50:51,949 INFO L116 LiptonReduction]: Number of co-enabled transitions 1348 [2021-09-22 14:50:53,961 INFO L131 LiptonReduction]: Checked pairs total: 2312 [2021-09-22 14:50:53,962 INFO L133 LiptonReduction]: Total number of compositions: 71 [2021-09-22 14:50:53,967 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 22 transitions, 59 flow [2021-09-22 14:50:54,001 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 226 states, 225 states have (on average 3.031111111111111) internal successors, (682), 225 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 226 states, 225 states have (on average 3.031111111111111) internal successors, (682), 225 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-09-22 14:50:54,016 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:50:54,016 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:50:54,017 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-09-22 14:50:54,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:50:54,023 INFO L82 PathProgramCache]: Analyzing trace with hash -354306525, now seen corresponding path program 1 times [2021-09-22 14:50:54,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:50:54,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23258436] [2021-09-22 14:50:54,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:50:54,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:50:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:50:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:50:54,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:50:54,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23258436] [2021-09-22 14:50:54,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23258436] provided 1 perfect and 0 imperfect interpolant sequences [2021-09-22 14:50:54,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-09-22 14:50:54,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-09-22 14:50:54,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745806408] [2021-09-22 14:50:54,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-09-22 14:50:54,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:50:54,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-09-22 14:50:54,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-09-22 14:50:54,219 INFO L87 Difference]: Start difference. First operand has 226 states, 225 states have (on average 3.031111111111111) internal successors, (682), 225 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:50:54,233 INFO L93 Difference]: Finished difference Result 226 states and 634 transitions. [2021-09-22 14:50:54,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-09-22 14:50:54,234 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-09-22 14:50:54,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:50:54,241 INFO L225 Difference]: With dead ends: 226 [2021-09-22 14:50:54,241 INFO L226 Difference]: Without dead ends: 226 [2021-09-22 14:50:54,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-09-22 14:50:54,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-09-22 14:50:54,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2021-09-22 14:50:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.8177777777777777) internal successors, (634), 225 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 634 transitions. [2021-09-22 14:50:54,291 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 634 transitions. Word has length 8 [2021-09-22 14:50:54,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:50:54,292 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 634 transitions. [2021-09-22 14:50:54,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,293 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 634 transitions. [2021-09-22 14:50:54,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-09-22 14:50:54,296 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:50:54,296 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:50:54,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-09-22 14:50:54,297 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-09-22 14:50:54,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:50:54,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1901389344, now seen corresponding path program 1 times [2021-09-22 14:50:54,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:50:54,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130071116] [2021-09-22 14:50:54,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:50:54,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:50:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:50:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:50:54,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:50:54,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130071116] [2021-09-22 14:50:54,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130071116] provided 1 perfect and 0 imperfect interpolant sequences [2021-09-22 14:50:54,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-09-22 14:50:54,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-09-22 14:50:54,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617718260] [2021-09-22 14:50:54,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-09-22 14:50:54,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:50:54,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-09-22 14:50:54,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-09-22 14:50:54,395 INFO L87 Difference]: Start difference. First operand 226 states and 634 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:50:54,428 INFO L93 Difference]: Finished difference Result 358 states and 938 transitions. [2021-09-22 14:50:54,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-09-22 14:50:54,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-09-22 14:50:54,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:50:54,431 INFO L225 Difference]: With dead ends: 358 [2021-09-22 14:50:54,433 INFO L226 Difference]: Without dead ends: 268 [2021-09-22 14:50:54,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-09-22 14:50:54,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-09-22 14:50:54,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 232. [2021-09-22 14:50:54,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.70995670995671) internal successors, (626), 231 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 626 transitions. [2021-09-22 14:50:54,455 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 626 transitions. Word has length 9 [2021-09-22 14:50:54,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:50:54,455 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 626 transitions. [2021-09-22 14:50:54,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,456 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 626 transitions. [2021-09-22 14:50:54,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-09-22 14:50:54,457 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:50:54,458 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:50:54,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-09-22 14:50:54,458 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-09-22 14:50:54,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:50:54,459 INFO L82 PathProgramCache]: Analyzing trace with hash 23029936, now seen corresponding path program 1 times [2021-09-22 14:50:54,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:50:54,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026826049] [2021-09-22 14:50:54,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:50:54,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:50:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:50:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:50:54,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:50:54,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026826049] [2021-09-22 14:50:54,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026826049] provided 1 perfect and 0 imperfect interpolant sequences [2021-09-22 14:50:54,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-09-22 14:50:54,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-09-22 14:50:54,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754422648] [2021-09-22 14:50:54,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-09-22 14:50:54,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:50:54,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-09-22 14:50:54,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-09-22 14:50:54,566 INFO L87 Difference]: Start difference. First operand 232 states and 626 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:50:54,598 INFO L93 Difference]: Finished difference Result 298 states and 754 transitions. [2021-09-22 14:50:54,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-09-22 14:50:54,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-09-22 14:50:54,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:50:54,603 INFO L225 Difference]: With dead ends: 298 [2021-09-22 14:50:54,603 INFO L226 Difference]: Without dead ends: 250 [2021-09-22 14:50:54,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-09-22 14:50:54,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-09-22 14:50:54,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 214. [2021-09-22 14:50:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.6572769953051645) internal successors, (566), 213 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 566 transitions. [2021-09-22 14:50:54,620 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 566 transitions. Word has length 10 [2021-09-22 14:50:54,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:50:54,621 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 566 transitions. [2021-09-22 14:50:54,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,621 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 566 transitions. [2021-09-22 14:50:54,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-09-22 14:50:54,621 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:50:54,621 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:50:54,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-09-22 14:50:54,622 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-09-22 14:50:54,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:50:54,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1186492359, now seen corresponding path program 1 times [2021-09-22 14:50:54,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:50:54,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545616915] [2021-09-22 14:50:54,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:50:54,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:50:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:50:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:50:54,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:50:54,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545616915] [2021-09-22 14:50:54,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545616915] provided 1 perfect and 0 imperfect interpolant sequences [2021-09-22 14:50:54,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-09-22 14:50:54,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-09-22 14:50:54,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252777912] [2021-09-22 14:50:54,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-09-22 14:50:54,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:50:54,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-09-22 14:50:54,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-09-22 14:50:54,690 INFO L87 Difference]: Start difference. First operand 214 states and 566 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:50:54,703 INFO L93 Difference]: Finished difference Result 232 states and 590 transitions. [2021-09-22 14:50:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-09-22 14:50:54,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-09-22 14:50:54,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:50:54,706 INFO L225 Difference]: With dead ends: 232 [2021-09-22 14:50:54,707 INFO L226 Difference]: Without dead ends: 196 [2021-09-22 14:50:54,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-09-22 14:50:54,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-09-22 14:50:54,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-09-22 14:50:54,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.6256410256410256) internal successors, (512), 195 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 512 transitions. [2021-09-22 14:50:54,717 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 512 transitions. Word has length 10 [2021-09-22 14:50:54,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:50:54,717 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 512 transitions. [2021-09-22 14:50:54,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,723 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 512 transitions. [2021-09-22 14:50:54,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-09-22 14:50:54,726 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:50:54,726 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:50:54,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-09-22 14:50:54,726 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-09-22 14:50:54,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:50:54,727 INFO L82 PathProgramCache]: Analyzing trace with hash 713908137, now seen corresponding path program 1 times [2021-09-22 14:50:54,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:50:54,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470296134] [2021-09-22 14:50:54,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:50:54,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:50:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:50:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:50:54,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:50:54,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470296134] [2021-09-22 14:50:54,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470296134] provided 1 perfect and 0 imperfect interpolant sequences [2021-09-22 14:50:54,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-09-22 14:50:54,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-09-22 14:50:54,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076406448] [2021-09-22 14:50:54,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-09-22 14:50:54,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:50:54,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-09-22 14:50:54,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-09-22 14:50:54,788 INFO L87 Difference]: Start difference. First operand 196 states and 512 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:50:54,825 INFO L93 Difference]: Finished difference Result 261 states and 661 transitions. [2021-09-22 14:50:54,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-09-22 14:50:54,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-09-22 14:50:54,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:50:54,827 INFO L225 Difference]: With dead ends: 261 [2021-09-22 14:50:54,827 INFO L226 Difference]: Without dead ends: 150 [2021-09-22 14:50:54,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-09-22 14:50:54,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-09-22 14:50:54,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-09-22 14:50:54,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.4563758389261743) internal successors, (366), 149 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 366 transitions. [2021-09-22 14:50:54,831 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 366 transitions. Word has length 11 [2021-09-22 14:50:54,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:50:54,831 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 366 transitions. [2021-09-22 14:50:54,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,831 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 366 transitions. [2021-09-22 14:50:54,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-09-22 14:50:54,832 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:50:54,832 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:50:54,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-09-22 14:50:54,832 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-09-22 14:50:54,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:50:54,832 INFO L82 PathProgramCache]: Analyzing trace with hash 2037604619, now seen corresponding path program 1 times [2021-09-22 14:50:54,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:50:54,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372282268] [2021-09-22 14:50:54,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:50:54,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:50:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:50:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:50:54,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:50:54,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372282268] [2021-09-22 14:50:54,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372282268] provided 1 perfect and 0 imperfect interpolant sequences [2021-09-22 14:50:54,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-09-22 14:50:54,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-09-22 14:50:54,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906389214] [2021-09-22 14:50:54,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-09-22 14:50:54,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:50:54,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-09-22 14:50:54,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-09-22 14:50:54,880 INFO L87 Difference]: Start difference. First operand 150 states and 366 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:50:54,901 INFO L93 Difference]: Finished difference Result 169 states and 374 transitions. [2021-09-22 14:50:54,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-09-22 14:50:54,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-09-22 14:50:54,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:50:54,902 INFO L225 Difference]: With dead ends: 169 [2021-09-22 14:50:54,902 INFO L226 Difference]: Without dead ends: 129 [2021-09-22 14:50:54,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-09-22 14:50:54,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-09-22 14:50:54,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-09-22 14:50:54,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.234375) internal successors, (286), 128 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 286 transitions. [2021-09-22 14:50:54,905 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 286 transitions. Word has length 12 [2021-09-22 14:50:54,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:50:54,905 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 286 transitions. [2021-09-22 14:50:54,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,906 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 286 transitions. [2021-09-22 14:50:54,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-09-22 14:50:54,907 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:50:54,907 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:50:54,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-09-22 14:50:54,907 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-09-22 14:50:54,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:50:54,907 INFO L82 PathProgramCache]: Analyzing trace with hash -797178107, now seen corresponding path program 1 times [2021-09-22 14:50:54,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:50:54,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274284785] [2021-09-22 14:50:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:50:54,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:50:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:50:54,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:50:54,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:50:54,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274284785] [2021-09-22 14:50:54,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274284785] provided 1 perfect and 0 imperfect interpolant sequences [2021-09-22 14:50:54,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-09-22 14:50:54,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-09-22 14:50:54,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788460500] [2021-09-22 14:50:54,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-09-22 14:50:54,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:50:54,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-09-22 14:50:54,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-09-22 14:50:54,963 INFO L87 Difference]: Start difference. First operand 129 states and 286 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:50:54,989 INFO L93 Difference]: Finished difference Result 122 states and 245 transitions. [2021-09-22 14:50:54,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-09-22 14:50:54,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-09-22 14:50:54,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:50:54,990 INFO L225 Difference]: With dead ends: 122 [2021-09-22 14:50:54,990 INFO L226 Difference]: Without dead ends: 95 [2021-09-22 14:50:54,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-09-22 14:50:54,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-09-22 14:50:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-09-22 14:50:54,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 94 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 187 transitions. [2021-09-22 14:50:54,992 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 187 transitions. Word has length 13 [2021-09-22 14:50:54,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:50:54,993 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 187 transitions. [2021-09-22 14:50:54,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:54,993 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 187 transitions. [2021-09-22 14:50:54,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-09-22 14:50:54,993 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:50:54,993 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:50:54,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-09-22 14:50:54,993 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-09-22 14:50:54,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:50:54,994 INFO L82 PathProgramCache]: Analyzing trace with hash -55678628, now seen corresponding path program 1 times [2021-09-22 14:50:54,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:50:54,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847740191] [2021-09-22 14:50:54,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:50:54,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:50:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:50:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:50:55,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:50:55,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847740191] [2021-09-22 14:50:55,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847740191] provided 1 perfect and 0 imperfect interpolant sequences [2021-09-22 14:50:55,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-09-22 14:50:55,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-09-22 14:50:55,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041540002] [2021-09-22 14:50:55,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-09-22 14:50:55,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:50:55,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-09-22 14:50:55,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-09-22 14:50:55,038 INFO L87 Difference]: Start difference. First operand 95 states and 187 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:55,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:50:55,071 INFO L93 Difference]: Finished difference Result 118 states and 221 transitions. [2021-09-22 14:50:55,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-09-22 14:50:55,072 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-09-22 14:50:55,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:50:55,072 INFO L225 Difference]: With dead ends: 118 [2021-09-22 14:50:55,072 INFO L226 Difference]: Without dead ends: 70 [2021-09-22 14:50:55,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-09-22 14:50:55,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-09-22 14:50:55,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2021-09-22 14:50:55,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.7164179104477613) internal successors, (115), 67 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:55,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 115 transitions. [2021-09-22 14:50:55,074 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 115 transitions. Word has length 15 [2021-09-22 14:50:55,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:50:55,074 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 115 transitions. [2021-09-22 14:50:55,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:55,074 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 115 transitions. [2021-09-22 14:50:55,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-09-22 14:50:55,075 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:50:55,075 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:50:55,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-09-22 14:50:55,075 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-09-22 14:50:55,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:50:55,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1663669412, now seen corresponding path program 2 times [2021-09-22 14:50:55,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:50:55,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108002295] [2021-09-22 14:50:55,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:50:55,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:50:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:50:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:50:55,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:50:55,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108002295] [2021-09-22 14:50:55,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108002295] provided 1 perfect and 0 imperfect interpolant sequences [2021-09-22 14:50:55,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-09-22 14:50:55,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-09-22 14:50:55,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937884550] [2021-09-22 14:50:55,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-09-22 14:50:55,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:50:55,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-09-22 14:50:55,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-09-22 14:50:55,131 INFO L87 Difference]: Start difference. First operand 68 states and 115 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:55,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:50:55,152 INFO L93 Difference]: Finished difference Result 58 states and 100 transitions. [2021-09-22 14:50:55,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-09-22 14:50:55,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-09-22 14:50:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:50:55,152 INFO L225 Difference]: With dead ends: 58 [2021-09-22 14:50:55,152 INFO L226 Difference]: Without dead ends: 0 [2021-09-22 14:50:55,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-09-22 14:50:55,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-09-22 14:50:55,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-09-22 14:50:55,153 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) [2021-09-22 14:50:55,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-09-22 14:50:55,154 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2021-09-22 14:50:55,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:50:55,154 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-09-22 14:50:55,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:50:55,154 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-09-22 14:50:55,154 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-09-22 14:50:55,156 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-09-22 14:50:55,158 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-09-22 14:50:55,158 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-09-22 14:50:55,159 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-09-22 14:50:55,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-09-22 14:50:55,161 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-09-22 14:50:55,161 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-09-22 14:50:55,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.09 02:50:55 BasicIcfg [2021-09-22 14:50:55,163 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-09-22 14:50:55,164 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-09-22 14:50:55,164 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-09-22 14:50:55,164 INFO L275 PluginConnector]: Witness Printer initialized [2021-09-22 14:50:55,164 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.09 02:50:51" (3/4) ... [2021-09-22 14:50:55,166 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-09-22 14:50:55,170 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2021-09-22 14:50:55,170 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2021-09-22 14:50:55,170 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2021-09-22 14:50:55,174 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-09-22 14:50:55,174 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-09-22 14:50:55,175 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-09-22 14:50:55,175 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-09-22 14:50:55,200 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-09-22 14:50:55,201 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-09-22 14:50:55,202 INFO L168 Benchmark]: Toolchain (without parser) took 4231.93 ms. Allocated memory was 52.4 MB in the beginning and 75.5 MB in the end (delta: 23.1 MB). Free memory was 29.0 MB in the beginning and 29.9 MB in the end (delta: -905.6 kB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. [2021-09-22 14:50:55,202 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 52.4 MB. Free memory was 34.5 MB in the beginning and 34.5 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-09-22 14:50:55,203 INFO L168 Benchmark]: CACSL2BoogieTranslator took 401.16 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 28.8 MB in the beginning and 37.2 MB in the end (delta: -8.4 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2021-09-22 14:50:55,203 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.48 ms. Allocated memory is still 62.9 MB. Free memory was 37.0 MB in the beginning and 35.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-09-22 14:50:55,203 INFO L168 Benchmark]: Boogie Preprocessor took 37.01 ms. Allocated memory is still 62.9 MB. Free memory was 35.1 MB in the beginning and 33.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-09-22 14:50:55,203 INFO L168 Benchmark]: RCFGBuilder took 350.04 ms. Allocated memory is still 62.9 MB. Free memory was 33.6 MB in the beginning and 38.9 MB in the end (delta: -5.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-09-22 14:50:55,204 INFO L168 Benchmark]: TraceAbstraction took 3353.19 ms. Allocated memory was 62.9 MB in the beginning and 75.5 MB in the end (delta: 12.6 MB). Free memory was 38.4 MB in the beginning and 32.8 MB in the end (delta: 5.6 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.1 GB. [2021-09-22 14:50:55,204 INFO L168 Benchmark]: Witness Printer took 37.10 ms. Allocated memory is still 75.5 MB. Free memory was 32.8 MB in the beginning and 29.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-09-22 14:50:55,205 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 52.4 MB. Free memory was 34.5 MB in the beginning and 34.5 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 401.16 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 28.8 MB in the beginning and 37.2 MB in the end (delta: -8.4 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.48 ms. Allocated memory is still 62.9 MB. Free memory was 37.0 MB in the beginning and 35.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.01 ms. Allocated memory is still 62.9 MB. Free memory was 35.1 MB in the beginning and 33.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 350.04 ms. Allocated memory is still 62.9 MB. Free memory was 33.6 MB in the beginning and 38.9 MB in the end (delta: -5.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3353.19 ms. Allocated memory was 62.9 MB in the beginning and 75.5 MB in the end (delta: 12.6 MB). Free memory was 38.4 MB in the beginning and 32.8 MB in the end (delta: 5.6 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.1 GB. * Witness Printer took 37.10 ms. Allocated memory is still 75.5 MB. Free memory was 32.8 MB in the beginning and 29.9 MB in the end (delta: 2.9 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: 2047.4ms, 90 PlacesBefore, 31 PlacesAfterwards, 82 TransitionsBefore, 22 TransitionsAfterwards, 1348 CoEnabledTransitionPairs, 5 FixpointIterations, 19 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 10 ConcurrentYvCompositions, 1 ChoiceCompositions, 71 TotalNumberOfCompositions, 2312 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1352, positive: 1284, positive conditional: 0, positive unconditional: 1284, negative: 68, negative conditional: 0, negative unconditional: 68, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 879, positive: 849, positive conditional: 0, positive unconditional: 849, negative: 30, negative conditional: 0, negative unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 879, positive: 843, positive conditional: 0, positive unconditional: 843, negative: 36, negative conditional: 0, negative unconditional: 36, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 36, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 30, negative conditional: 0, negative unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 67, positive: 11, positive conditional: 0, positive unconditional: 11, negative: 56, negative conditional: 0, negative unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1352, positive: 435, positive conditional: 0, positive unconditional: 435, negative: 38, negative conditional: 0, negative unconditional: 38, unknown: 879, unknown conditional: 0, unknown unconditional: 879] , Statistics on independence cache: Total cache size (in pairs): 75, Positive cache size: 66, Positive conditional cache size: 0, Positive unconditional cache size: 66, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9 - 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: 18]: 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 7 procedures, 104 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 3269.0ms, OverallIterations: 9, TraceHistogramMax: 1, EmptinessCheckTime: 24.7ms, AutomataDifference: 280.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2103.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 190 SDtfs, 218 SDslu, 305 SDs, 0 SdLazy, 137 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 88.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 119.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=232occurred in iteration=2, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 96.6ms AutomataMinimizationTime, 9 MinimizatonAttempts, 74 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 25.3ms SsaConstructionTime, 132.1ms SatisfiabilityAnalysisTime, 377.2ms InterpolantComputationTime, 103 NumberOfCodeBlocks, 103 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 94 ConstructedInterpolants, 0 QuantifiedInterpolants, 447 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 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! [2021-09-22 14:50:55,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...