./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-wmm/safe023_tso.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 96f16385 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/safe023_tso.oepc.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 89d18357e5beee986360f57fba4e9590d5a4033b .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-96f1638 [2020-12-02 12:10:41,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 12:10:41,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 12:10:41,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 12:10:41,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 12:10:41,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 12:10:41,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 12:10:41,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 12:10:41,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 12:10:41,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 12:10:41,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 12:10:41,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 12:10:41,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 12:10:41,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 12:10:41,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 12:10:41,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 12:10:41,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 12:10:41,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 12:10:41,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 12:10:41,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 12:10:41,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 12:10:41,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 12:10:41,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 12:10:41,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 12:10:41,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 12:10:41,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 12:10:41,177 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 12:10:41,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 12:10:41,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 12:10:41,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 12:10:41,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 12:10:41,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 12:10:41,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 12:10:41,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 12:10:41,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 12:10:41,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 12:10:41,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 12:10:41,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 12:10:41,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 12:10:41,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 12:10:41,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 12:10:41,191 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-02 12:10:41,228 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 12:10:41,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 12:10:41,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 12:10:41,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 12:10:41,230 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 12:10:41,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 12:10:41,231 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 12:10:41,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-02 12:10:41,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 12:10:41,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 12:10:41,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 12:10:41,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 12:10:41,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 12:10:41,233 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 12:10:41,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 12:10:41,233 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 12:10:41,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 12:10:41,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 12:10:41,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 12:10:41,234 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 12:10:41,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 12:10:41,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 12:10:41,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 12:10:41,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 12:10:41,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 12:10:41,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-02 12:10:41,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-02 12:10:41,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 12:10:41,237 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 12:10:41,237 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89d18357e5beee986360f57fba4e9590d5a4033b [2020-12-02 12:10:41,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 12:10:41,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 12:10:41,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 12:10:41,655 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 12:10:41,656 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 12:10:41,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe023_tso.oepc.i [2020-12-02 12:10:41,753 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/555a33401/f89e461e8031408eb6a9e0a03357f895/FLAG96b61d723 [2020-12-02 12:10:42,363 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 12:10:42,363 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe023_tso.oepc.i [2020-12-02 12:10:42,384 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/555a33401/f89e461e8031408eb6a9e0a03357f895/FLAG96b61d723 [2020-12-02 12:10:42,654 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/555a33401/f89e461e8031408eb6a9e0a03357f895 [2020-12-02 12:10:42,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 12:10:42,660 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 12:10:42,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 12:10:42,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 12:10:42,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 12:10:42,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:10:42" (1/1) ... [2020-12-02 12:10:42,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f3907e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:42, skipping insertion in model container [2020-12-02 12:10:42,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:10:42" (1/1) ... [2020-12-02 12:10:42,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 12:10:42,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-02 12:10:42,969 WARN L226 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/safe023_tso.oepc.i[950,963] [2020-12-02 12:10:43,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-02 12:10:43,196 INFO L203 MainTranslator]: Completed pre-run [2020-12-02 12:10:43,218 WARN L226 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/safe023_tso.oepc.i[950,963] [2020-12-02 12:10:43,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-02 12:10:43,442 INFO L208 MainTranslator]: Completed translation [2020-12-02 12:10:43,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:43 WrapperNode [2020-12-02 12:10:43,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 12:10:43,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 12:10:43,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 12:10:43,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 12:10:43,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:43" (1/1) ... [2020-12-02 12:10:43,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:43" (1/1) ... [2020-12-02 12:10:43,537 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 12:10:43,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 12:10:43,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 12:10:43,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 12:10:43,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:43" (1/1) ... [2020-12-02 12:10:43,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:43" (1/1) ... [2020-12-02 12:10:43,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:43" (1/1) ... [2020-12-02 12:10:43,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:43" (1/1) ... [2020-12-02 12:10:43,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:43" (1/1) ... [2020-12-02 12:10:43,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:43" (1/1) ... [2020-12-02 12:10:43,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:43" (1/1) ... [2020-12-02 12:10:43,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 12:10:43,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 12:10:43,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 12:10:43,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 12:10:43,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 12:10:43,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-02 12:10:43,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-02 12:10:43,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 12:10:43,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-02 12:10:43,735 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-12-02 12:10:43,735 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-12-02 12:10:43,735 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-12-02 12:10:43,736 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-12-02 12:10:43,736 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-12-02 12:10:43,736 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-12-02 12:10:43,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-02 12:10:43,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-02 12:10:43,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 12:10:43,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 12:10:43,739 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-02 12:10:44,265 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 12:10:44,266 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-02 12:10:44,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:10:44 BoogieIcfgContainer [2020-12-02 12:10:44,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 12:10:44,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 12:10:44,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 12:10:44,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 12:10:44,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:10:42" (1/3) ... [2020-12-02 12:10:44,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b888b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:10:44, skipping insertion in model container [2020-12-02 12:10:44,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:10:43" (2/3) ... [2020-12-02 12:10:44,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b888b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:10:44, skipping insertion in model container [2020-12-02 12:10:44,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:10:44" (3/3) ... [2020-12-02 12:10:44,277 INFO L111 eAbstractionObserver]: Analyzing ICFG safe023_tso.oepc.i [2020-12-02 12:10:44,292 WARN L169 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-02 12:10:44,293 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 12:10:44,302 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 12:10:44,303 INFO L354 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-02 12:10:44,333 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,334 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,334 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,334 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,335 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,335 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,335 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,335 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,336 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,336 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,336 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,337 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,337 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,337 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,338 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,338 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,338 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,338 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,339 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,339 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,339 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,340 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,340 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,340 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,341 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,341 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,341 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,342 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,342 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,342 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,342 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,343 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,343 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,343 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,344 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,344 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,346 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,347 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,347 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,347 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,353 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,353 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,353 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,354 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,356 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,356 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,357 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,357 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-02 12:10:44,359 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-02 12:10:44,372 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-02 12:10:44,396 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 12:10:44,396 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 12:10:44,397 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 12:10:44,397 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 12:10:44,397 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 12:10:44,397 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 12:10:44,397 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 12:10:44,397 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 12:10:44,411 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-02 12:10:44,413 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 75 transitions, 165 flow [2020-12-02 12:10:44,416 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 75 transitions, 165 flow [2020-12-02 12:10:44,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 83 places, 75 transitions, 165 flow [2020-12-02 12:10:44,469 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2020-12-02 12:10:44,469 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-02 12:10:44,480 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 72 events. 2/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 56. Up to 2 conditions per place. [2020-12-02 12:10:44,486 INFO L116 LiptonReduction]: Number of co-enabled transitions 1296 [2020-12-02 12:10:47,040 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-02 12:10:47,244 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-02 12:10:48,206 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-12-02 12:10:48,315 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-12-02 12:10:48,538 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-12-02 12:10:48,648 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-12-02 12:10:48,709 INFO L131 LiptonReduction]: Checked pairs total: 2371 [2020-12-02 12:10:48,710 INFO L133 LiptonReduction]: Total number of compositions: 63 [2020-12-02 12:10:48,717 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 21 transitions, 57 flow [2020-12-02 12:10:48,745 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 298 states. [2020-12-02 12:10:48,747 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states. [2020-12-02 12:10:48,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-02 12:10:48,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 12:10:48,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 12:10:48,755 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 12:10:48,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 12:10:48,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1684989787, now seen corresponding path program 1 times [2020-12-02 12:10:48,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 12:10:48,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119978755] [2020-12-02 12:10:48,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 12:10:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 12:10:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 12:10:49,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119978755] [2020-12-02 12:10:49,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 12:10:49,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-02 12:10:49,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172874884] [2020-12-02 12:10:49,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-02 12:10:49,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 12:10:49,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-02 12:10:49,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-02 12:10:49,196 INFO L87 Difference]: Start difference. First operand 298 states. Second operand 3 states. [2020-12-02 12:10:49,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 12:10:49,273 INFO L93 Difference]: Finished difference Result 499 states and 1376 transitions. [2020-12-02 12:10:49,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-02 12:10:49,275 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-02 12:10:49,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 12:10:49,294 INFO L225 Difference]: With dead ends: 499 [2020-12-02 12:10:49,294 INFO L226 Difference]: Without dead ends: 317 [2020-12-02 12:10:49,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-02 12:10:49,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-12-02 12:10:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 272. [2020-12-02 12:10:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-12-02 12:10:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 685 transitions. [2020-12-02 12:10:49,394 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 685 transitions. Word has length 8 [2020-12-02 12:10:49,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 12:10:49,396 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 685 transitions. [2020-12-02 12:10:49,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-02 12:10:49,397 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 685 transitions. [2020-12-02 12:10:49,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-02 12:10:49,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 12:10:49,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 12:10:49,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-02 12:10:49,406 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 12:10:49,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 12:10:49,407 INFO L82 PathProgramCache]: Analyzing trace with hash 695087089, now seen corresponding path program 1 times [2020-12-02 12:10:49,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 12:10:49,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810698753] [2020-12-02 12:10:49,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 12:10:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 12:10:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 12:10:49,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810698753] [2020-12-02 12:10:49,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 12:10:49,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-02 12:10:49,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531459865] [2020-12-02 12:10:49,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 12:10:49,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 12:10:49,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 12:10:49,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-02 12:10:49,527 INFO L87 Difference]: Start difference. First operand 272 states and 685 transitions. Second operand 4 states. [2020-12-02 12:10:49,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 12:10:49,575 INFO L93 Difference]: Finished difference Result 254 states and 605 transitions. [2020-12-02 12:10:49,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-02 12:10:49,577 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-02 12:10:49,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 12:10:49,580 INFO L225 Difference]: With dead ends: 254 [2020-12-02 12:10:49,580 INFO L226 Difference]: Without dead ends: 218 [2020-12-02 12:10:49,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-02 12:10:49,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-02 12:10:49,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 192. [2020-12-02 12:10:49,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-02 12:10:49,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 465 transitions. [2020-12-02 12:10:49,601 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 465 transitions. Word has length 9 [2020-12-02 12:10:49,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 12:10:49,602 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 465 transitions. [2020-12-02 12:10:49,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 12:10:49,602 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 465 transitions. [2020-12-02 12:10:49,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-02 12:10:49,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 12:10:49,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 12:10:49,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-02 12:10:49,605 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 12:10:49,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 12:10:49,606 INFO L82 PathProgramCache]: Analyzing trace with hash -2042757351, now seen corresponding path program 1 times [2020-12-02 12:10:49,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 12:10:49,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388199258] [2020-12-02 12:10:49,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 12:10:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 12:10:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 12:10:49,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388199258] [2020-12-02 12:10:49,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 12:10:49,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-02 12:10:49,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552644913] [2020-12-02 12:10:49,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 12:10:49,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 12:10:49,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 12:10:49,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-02 12:10:49,696 INFO L87 Difference]: Start difference. First operand 192 states and 465 transitions. Second operand 4 states. [2020-12-02 12:10:49,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 12:10:49,741 INFO L93 Difference]: Finished difference Result 246 states and 577 transitions. [2020-12-02 12:10:49,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-02 12:10:49,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-02 12:10:49,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 12:10:49,744 INFO L225 Difference]: With dead ends: 246 [2020-12-02 12:10:49,744 INFO L226 Difference]: Without dead ends: 186 [2020-12-02 12:10:49,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-02 12:10:49,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-02 12:10:49,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 170. [2020-12-02 12:10:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-02 12:10:49,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 405 transitions. [2020-12-02 12:10:49,773 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 405 transitions. Word has length 11 [2020-12-02 12:10:49,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 12:10:49,774 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 405 transitions. [2020-12-02 12:10:49,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 12:10:49,774 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 405 transitions. [2020-12-02 12:10:49,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-02 12:10:49,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 12:10:49,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 12:10:49,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-02 12:10:49,781 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 12:10:49,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 12:10:49,782 INFO L82 PathProgramCache]: Analyzing trace with hash -2042769348, now seen corresponding path program 1 times [2020-12-02 12:10:49,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 12:10:49,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658950226] [2020-12-02 12:10:49,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 12:10:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 12:10:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 12:10:49,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658950226] [2020-12-02 12:10:49,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 12:10:49,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-02 12:10:49,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129311353] [2020-12-02 12:10:49,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 12:10:49,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 12:10:49,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 12:10:49,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-02 12:10:49,924 INFO L87 Difference]: Start difference. First operand 170 states and 405 transitions. Second operand 4 states. [2020-12-02 12:10:49,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 12:10:49,951 INFO L93 Difference]: Finished difference Result 182 states and 423 transitions. [2020-12-02 12:10:49,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-02 12:10:49,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-02 12:10:49,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 12:10:49,955 INFO L225 Difference]: With dead ends: 182 [2020-12-02 12:10:49,955 INFO L226 Difference]: Without dead ends: 182 [2020-12-02 12:10:49,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-02 12:10:49,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-02 12:10:49,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 140. [2020-12-02 12:10:49,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-02 12:10:49,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 328 transitions. [2020-12-02 12:10:49,969 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 328 transitions. Word has length 11 [2020-12-02 12:10:49,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 12:10:49,970 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 328 transitions. [2020-12-02 12:10:49,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 12:10:49,971 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 328 transitions. [2020-12-02 12:10:49,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-02 12:10:49,974 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 12:10:49,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 12:10:49,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-02 12:10:49,979 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 12:10:49,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 12:10:49,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1140142386, now seen corresponding path program 1 times [2020-12-02 12:10:49,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 12:10:49,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248037333] [2020-12-02 12:10:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 12:10:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 12:10:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 12:10:50,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248037333] [2020-12-02 12:10:50,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 12:10:50,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-02 12:10:50,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387677373] [2020-12-02 12:10:50,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-02 12:10:50,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 12:10:50,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-02 12:10:50,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-02 12:10:50,104 INFO L87 Difference]: Start difference. First operand 140 states and 328 transitions. Second operand 5 states. [2020-12-02 12:10:50,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 12:10:50,126 INFO L93 Difference]: Finished difference Result 142 states and 313 transitions. [2020-12-02 12:10:50,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-02 12:10:50,126 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-02 12:10:50,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 12:10:50,127 INFO L225 Difference]: With dead ends: 142 [2020-12-02 12:10:50,127 INFO L226 Difference]: Without dead ends: 82 [2020-12-02 12:10:50,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-02 12:10:50,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-02 12:10:50,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-12-02 12:10:50,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-02 12:10:50,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 171 transitions. [2020-12-02 12:10:50,131 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 171 transitions. Word has length 12 [2020-12-02 12:10:50,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 12:10:50,132 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 171 transitions. [2020-12-02 12:10:50,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-02 12:10:50,132 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 171 transitions. [2020-12-02 12:10:50,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-02 12:10:50,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 12:10:50,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 12:10:50,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-02 12:10:50,133 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 12:10:50,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 12:10:50,134 INFO L82 PathProgramCache]: Analyzing trace with hash -301354668, now seen corresponding path program 1 times [2020-12-02 12:10:50,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 12:10:50,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419934649] [2020-12-02 12:10:50,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 12:10:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 12:10:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 12:10:50,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419934649] [2020-12-02 12:10:50,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 12:10:50,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-02 12:10:50,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982630807] [2020-12-02 12:10:50,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-02 12:10:50,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 12:10:50,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-02 12:10:50,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-02 12:10:50,218 INFO L87 Difference]: Start difference. First operand 82 states and 171 transitions. Second operand 4 states. [2020-12-02 12:10:50,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 12:10:50,251 INFO L93 Difference]: Finished difference Result 88 states and 172 transitions. [2020-12-02 12:10:50,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-02 12:10:50,251 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-02 12:10:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 12:10:50,252 INFO L225 Difference]: With dead ends: 88 [2020-12-02 12:10:50,252 INFO L226 Difference]: Without dead ends: 71 [2020-12-02 12:10:50,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-02 12:10:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-02 12:10:50,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-12-02 12:10:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-02 12:10:50,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 138 transitions. [2020-12-02 12:10:50,256 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 138 transitions. Word has length 13 [2020-12-02 12:10:50,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 12:10:50,256 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 138 transitions. [2020-12-02 12:10:50,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-02 12:10:50,256 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 138 transitions. [2020-12-02 12:10:50,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-02 12:10:50,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 12:10:50,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 12:10:50,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-02 12:10:50,257 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 12:10:50,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 12:10:50,258 INFO L82 PathProgramCache]: Analyzing trace with hash 150538107, now seen corresponding path program 1 times [2020-12-02 12:10:50,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 12:10:50,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936957869] [2020-12-02 12:10:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 12:10:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 12:10:50,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 12:10:50,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936957869] [2020-12-02 12:10:50,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 12:10:50,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-02 12:10:50,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552049720] [2020-12-02 12:10:50,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-02 12:10:50,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 12:10:50,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-02 12:10:50,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-02 12:10:50,314 INFO L87 Difference]: Start difference. First operand 71 states and 138 transitions. Second operand 5 states. [2020-12-02 12:10:50,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 12:10:50,356 INFO L93 Difference]: Finished difference Result 67 states and 127 transitions. [2020-12-02 12:10:50,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-02 12:10:50,357 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-02 12:10:50,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 12:10:50,357 INFO L225 Difference]: With dead ends: 67 [2020-12-02 12:10:50,358 INFO L226 Difference]: Without dead ends: 58 [2020-12-02 12:10:50,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-02 12:10:50,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-02 12:10:50,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-02 12:10:50,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-02 12:10:50,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 110 transitions. [2020-12-02 12:10:50,361 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 110 transitions. Word has length 14 [2020-12-02 12:10:50,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 12:10:50,361 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 110 transitions. [2020-12-02 12:10:50,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-02 12:10:50,361 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 110 transitions. [2020-12-02 12:10:50,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-02 12:10:50,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 12:10:50,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-02 12:10:50,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-02 12:10:50,362 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 12:10:50,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 12:10:50,363 INFO L82 PathProgramCache]: Analyzing trace with hash 791467962, now seen corresponding path program 1 times [2020-12-02 12:10:50,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 12:10:50,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191191711] [2020-12-02 12:10:50,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 12:10:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 12:10:50,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 12:10:50,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191191711] [2020-12-02 12:10:50,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 12:10:50,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-02 12:10:50,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542878064] [2020-12-02 12:10:50,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-02 12:10:50,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 12:10:50,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-02 12:10:50,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-02 12:10:50,424 INFO L87 Difference]: Start difference. First operand 58 states and 110 transitions. Second operand 6 states. [2020-12-02 12:10:50,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 12:10:50,465 INFO L93 Difference]: Finished difference Result 55 states and 107 transitions. [2020-12-02 12:10:50,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-02 12:10:50,466 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-02 12:10:50,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 12:10:50,467 INFO L225 Difference]: With dead ends: 55 [2020-12-02 12:10:50,467 INFO L226 Difference]: Without dead ends: 0 [2020-12-02 12:10:50,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-02 12:10:50,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-02 12:10:50,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-02 12:10:50,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-02 12:10:50,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-02 12:10:50,468 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-12-02 12:10:50,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 12:10:50,468 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-02 12:10:50,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-02 12:10:50,468 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-02 12:10:50,469 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-02 12:10:50,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-02 12:10:50,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 12:10:50 BasicIcfg [2020-12-02 12:10:50,473 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 12:10:50,474 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 12:10:50,474 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 12:10:50,474 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 12:10:50,475 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:10:44" (3/4) ... [2020-12-02 12:10:50,478 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-02 12:10:50,486 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-12-02 12:10:50,487 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-12-02 12:10:50,487 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2020-12-02 12:10:50,492 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-12-02 12:10:50,493 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-02 12:10:50,493 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-02 12:10:50,493 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-02 12:10:50,543 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-02 12:10:50,543 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 12:10:50,547 INFO L168 Benchmark]: Toolchain (without parser) took 7884.75 ms. Allocated memory was 46.1 MB in the beginning and 123.7 MB in the end (delta: 77.6 MB). Free memory was 22.1 MB in the beginning and 66.5 MB in the end (delta: -44.4 MB). Peak memory consumption was 33.8 MB. Max. memory is 16.1 GB. [2020-12-02 12:10:50,547 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 46.1 MB. Free memory was 31.2 MB in the beginning and 31.2 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 12:10:50,550 INFO L168 Benchmark]: CACSL2BoogieTranslator took 781.69 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 21.8 MB in the beginning and 32.8 MB in the end (delta: -11.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-02 12:10:50,551 INFO L168 Benchmark]: Boogie Procedure Inliner took 91.03 ms. Allocated memory is still 56.6 MB. Free memory was 32.8 MB in the beginning and 30.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 12:10:50,552 INFO L168 Benchmark]: Boogie Preprocessor took 60.08 ms. Allocated memory is still 56.6 MB. Free memory was 30.8 MB in the beginning and 29.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 12:10:50,552 INFO L168 Benchmark]: RCFGBuilder took 664.05 ms. Allocated memory is still 56.6 MB. Free memory was 29.5 MB in the beginning and 21.2 MB in the end (delta: 8.3 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. [2020-12-02 12:10:50,553 INFO L168 Benchmark]: TraceAbstraction took 6203.39 ms. Allocated memory was 56.6 MB in the beginning and 123.7 MB in the end (delta: 67.1 MB). Free memory was 20.9 MB in the beginning and 68.6 MB in the end (delta: -47.7 MB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. [2020-12-02 12:10:50,553 INFO L168 Benchmark]: Witness Printer took 69.37 ms. Allocated memory is still 123.7 MB. Free memory was 68.6 MB in the beginning and 66.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 12:10:50,562 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 46.1 MB. Free memory was 31.2 MB in the beginning and 31.2 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 781.69 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 21.8 MB in the beginning and 32.8 MB in the end (delta: -11.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 91.03 ms. Allocated memory is still 56.6 MB. Free memory was 32.8 MB in the beginning and 30.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.08 ms. Allocated memory is still 56.6 MB. Free memory was 30.8 MB in the beginning and 29.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 664.05 ms. Allocated memory is still 56.6 MB. Free memory was 29.5 MB in the beginning and 21.2 MB in the end (delta: 8.3 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6203.39 ms. Allocated memory was 56.6 MB in the beginning and 123.7 MB in the end (delta: 67.1 MB). Free memory was 20.9 MB in the beginning and 68.6 MB in the end (delta: -47.7 MB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. * Witness Printer took 69.37 ms. Allocated memory is still 123.7 MB. Free memory was 68.6 MB in the beginning and 66.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 850 VarBasedMoverChecksPositive, 46 VarBasedMoverChecksNegative, 13 SemBasedMoverChecksPositive, 33 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.5s, 82 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 4.2s, 83 PlacesBefore, 31 PlacesAfterwards, 75 TransitionsBefore, 21 TransitionsAfterwards, 1296 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 37 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 2 ChoiceCompositions, 63 TotalNumberOfCompositions, 2371 MoverChecksTotal - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 74 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.0s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.3s, HoareTripleCheckerStatistics: 133 SDtfs, 183 SDslu, 132 SDs, 0 SdLazy, 70 SolverSat, 45 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=298occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 129 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 93 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 4234 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...