./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-wmm/safe031_tso.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 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/safe031_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 25bf107b32c5a41b59e37f88c1586c9e4bdbf561 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-26 00:33:32,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 00:33:32,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 00:33:32,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 00:33:32,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 00:33:32,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 00:33:32,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 00:33:32,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 00:33:32,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 00:33:32,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 00:33:32,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 00:33:32,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 00:33:32,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 00:33:32,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 00:33:32,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 00:33:32,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 00:33:32,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 00:33:32,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 00:33:32,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 00:33:32,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 00:33:32,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 00:33:32,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 00:33:32,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 00:33:32,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 00:33:32,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 00:33:32,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 00:33:32,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 00:33:32,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 00:33:32,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 00:33:32,572 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 00:33:32,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 00:33:32,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 00:33:32,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 00:33:32,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 00:33:32,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 00:33:32,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 00:33:32,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 00:33:32,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 00:33:32,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 00:33:32,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 00:33:32,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 00:33:32,599 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 00:33:32,656 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 00:33:32,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 00:33:32,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 00:33:32,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 00:33:32,661 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 00:33:32,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 00:33:32,661 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 00:33:32,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 00:33:32,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 00:33:32,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 00:33:32,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 00:33:32,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 00:33:32,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 00:33:32,664 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 00:33:32,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 00:33:32,665 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 00:33:32,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 00:33:32,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 00:33:32,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 00:33:32,665 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 00:33:32,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 00:33:32,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 00:33:32,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 00:33:32,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 00:33:32,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 00:33:32,667 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 00:33:32,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 00:33:32,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 00:33:32,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 00:33:32,667 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25bf107b32c5a41b59e37f88c1586c9e4bdbf561 [2020-10-26 00:33:33,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 00:33:33,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 00:33:33,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 00:33:33,112 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 00:33:33,113 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 00:33:33,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe031_tso.oepc.i [2020-10-26 00:33:33,218 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19944ff75/c60f4840058f4f82bac27c4fcfa5acb9/FLAG876e40144 [2020-10-26 00:33:33,984 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 00:33:33,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe031_tso.oepc.i [2020-10-26 00:33:34,010 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19944ff75/c60f4840058f4f82bac27c4fcfa5acb9/FLAG876e40144 [2020-10-26 00:33:34,201 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19944ff75/c60f4840058f4f82bac27c4fcfa5acb9 [2020-10-26 00:33:34,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 00:33:34,217 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-26 00:33:34,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 00:33:34,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 00:33:34,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 00:33:34,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 12:33:34" (1/1) ... [2020-10-26 00:33:34,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d0091d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:33:34, skipping insertion in model container [2020-10-26 00:33:34,237 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 12:33:34" (1/1) ... [2020-10-26 00:33:34,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 00:33:34,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 00:33:34,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 00:33:34,767 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 00:33:34,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 00:33:34,937 INFO L208 MainTranslator]: Completed translation [2020-10-26 00:33:34,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:33:34 WrapperNode [2020-10-26 00:33:34,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 00:33:34,939 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-26 00:33:34,940 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-26 00:33:34,940 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-26 00:33:34,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:33:34" (1/1) ... [2020-10-26 00:33:34,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:33:34" (1/1) ... [2020-10-26 00:33:35,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-26 00:33:35,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 00:33:35,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 00:33:35,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 00:33:35,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:33:34" (1/1) ... [2020-10-26 00:33:35,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:33:34" (1/1) ... [2020-10-26 00:33:35,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:33:34" (1/1) ... [2020-10-26 00:33:35,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:33:34" (1/1) ... [2020-10-26 00:33:35,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:33:34" (1/1) ... [2020-10-26 00:33:35,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:33:34" (1/1) ... [2020-10-26 00:33:35,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:33:34" (1/1) ... [2020-10-26 00:33:35,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 00:33:35,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 00:33:35,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 00:33:35,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 00:33:35,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:33:34" (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 [2020-10-26 00:33:35,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 00:33:35,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-26 00:33:35,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 00:33:35,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 00:33:35,185 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-26 00:33:35,185 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-26 00:33:35,185 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-26 00:33:35,185 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-26 00:33:35,185 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-26 00:33:35,185 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-26 00:33:35,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 00:33:35,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-26 00:33:35,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 00:33:35,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 00:33:35,189 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-26 00:33:35,728 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 00:33:35,728 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-26 00:33:35,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 12:33:35 BoogieIcfgContainer [2020-10-26 00:33:35,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 00:33:35,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 00:33:35,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 00:33:35,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 00:33:35,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 12:33:34" (1/3) ... [2020-10-26 00:33:35,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c4d3d1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 12:33:35, skipping insertion in model container [2020-10-26 00:33:35,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:33:34" (2/3) ... [2020-10-26 00:33:35,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c4d3d1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 12:33:35, skipping insertion in model container [2020-10-26 00:33:35,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 12:33:35" (3/3) ... [2020-10-26 00:33:35,743 INFO L111 eAbstractionObserver]: Analyzing ICFG safe031_tso.oepc.i [2020-10-26 00:33:35,758 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-26 00:33:35,758 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-26 00:33:35,765 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 00:33:35,766 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-26 00:33:35,808 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,809 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,809 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,809 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,810 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,810 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,811 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,811 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,811 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,811 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,812 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,812 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,813 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,813 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,813 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,813 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,814 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,814 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,817 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,818 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,818 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,818 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,825 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,826 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,826 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,826 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,834 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,834 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,835 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,835 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:33:35,850 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-26 00:33:35,864 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-26 00:33:35,893 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 00:33:35,893 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 00:33:35,893 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-26 00:33:35,894 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 00:33:35,894 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 00:33:35,894 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 00:33:35,895 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 00:33:35,895 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 00:33:35,909 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-26 00:33:35,912 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 78 transitions, 171 flow [2020-10-26 00:33:35,916 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 78 transitions, 171 flow [2020-10-26 00:33:35,919 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 85 places, 78 transitions, 171 flow [2020-10-26 00:33:35,972 INFO L129 PetriNetUnfolder]: 3/75 cut-off events. [2020-10-26 00:33:35,972 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-26 00:33:35,977 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 75 events. 3/75 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 57 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2020-10-26 00:33:35,982 INFO L116 LiptonReduction]: Number of co-enabled transitions 1440 [2020-10-26 00:33:36,800 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-10-26 00:33:38,171 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-26 00:33:38,285 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-26 00:33:38,302 INFO L131 LiptonReduction]: Checked pairs total: 2814 [2020-10-26 00:33:38,302 INFO L133 LiptonReduction]: Total number of compositions: 71 [2020-10-26 00:33:38,309 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 23 transitions, 61 flow [2020-10-26 00:33:38,340 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 362 states. [2020-10-26 00:33:38,343 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states. [2020-10-26 00:33:38,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-26 00:33:38,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:33:38,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:33:38,352 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:33:38,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:33:38,359 INFO L82 PathProgramCache]: Analyzing trace with hash 515529937, now seen corresponding path program 1 times [2020-10-26 00:33:38,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:33:38,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870282547] [2020-10-26 00:33:38,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:33:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:33:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:33:38,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870282547] [2020-10-26 00:33:38,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:33:38,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-26 00:33:38,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310833567] [2020-10-26 00:33:38,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-26 00:33:38,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:33:38,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-26 00:33:38,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-26 00:33:38,624 INFO L87 Difference]: Start difference. First operand 362 states. Second operand 2 states. [2020-10-26 00:33:38,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:33:38,679 INFO L93 Difference]: Finished difference Result 362 states and 1072 transitions. [2020-10-26 00:33:38,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-26 00:33:38,682 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-10-26 00:33:38,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:33:38,712 INFO L225 Difference]: With dead ends: 362 [2020-10-26 00:33:38,712 INFO L226 Difference]: Without dead ends: 298 [2020-10-26 00:33:38,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-26 00:33:38,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-26 00:33:38,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2020-10-26 00:33:38,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-26 00:33:38,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 864 transitions. [2020-10-26 00:33:38,813 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 864 transitions. Word has length 8 [2020-10-26 00:33:38,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:33:38,814 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 864 transitions. [2020-10-26 00:33:38,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-26 00:33:38,815 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 864 transitions. [2020-10-26 00:33:38,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-26 00:33:38,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:33:38,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:33:38,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 00:33:38,818 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:33:38,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:33:38,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1198450655, now seen corresponding path program 1 times [2020-10-26 00:33:38,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:33:38,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817280314] [2020-10-26 00:33:38,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:33:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:33:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:33:38,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817280314] [2020-10-26 00:33:38,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:33:38,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-26 00:33:38,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047051075] [2020-10-26 00:33:38,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 00:33:38,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:33:38,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 00:33:38,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 00:33:38,966 INFO L87 Difference]: Start difference. First operand 298 states and 864 transitions. Second operand 4 states. [2020-10-26 00:33:39,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:33:39,008 INFO L93 Difference]: Finished difference Result 346 states and 956 transitions. [2020-10-26 00:33:39,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 00:33:39,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-10-26 00:33:39,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:33:39,012 INFO L225 Difference]: With dead ends: 346 [2020-10-26 00:33:39,012 INFO L226 Difference]: Without dead ends: 282 [2020-10-26 00:33:39,013 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 [2020-10-26 00:33:39,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-26 00:33:39,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2020-10-26 00:33:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-26 00:33:39,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 804 transitions. [2020-10-26 00:33:39,050 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 804 transitions. Word has length 9 [2020-10-26 00:33:39,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:33:39,050 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 804 transitions. [2020-10-26 00:33:39,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 00:33:39,051 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 804 transitions. [2020-10-26 00:33:39,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-26 00:33:39,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:33:39,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:33:39,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 00:33:39,053 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:33:39,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:33:39,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1977877749, now seen corresponding path program 1 times [2020-10-26 00:33:39,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:33:39,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635894450] [2020-10-26 00:33:39,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:33:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:33:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:33:39,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635894450] [2020-10-26 00:33:39,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:33:39,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-26 00:33:39,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740758986] [2020-10-26 00:33:39,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 00:33:39,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:33:39,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 00:33:39,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 00:33:39,204 INFO L87 Difference]: Start difference. First operand 282 states and 804 transitions. Second operand 4 states. [2020-10-26 00:33:39,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:33:39,247 INFO L93 Difference]: Finished difference Result 318 states and 870 transitions. [2020-10-26 00:33:39,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 00:33:39,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-26 00:33:39,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:33:39,253 INFO L225 Difference]: With dead ends: 318 [2020-10-26 00:33:39,253 INFO L226 Difference]: Without dead ends: 270 [2020-10-26 00:33:39,253 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 [2020-10-26 00:33:39,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-26 00:33:39,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2020-10-26 00:33:39,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-26 00:33:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 760 transitions. [2020-10-26 00:33:39,290 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 760 transitions. Word has length 10 [2020-10-26 00:33:39,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:33:39,290 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 760 transitions. [2020-10-26 00:33:39,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 00:33:39,291 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 760 transitions. [2020-10-26 00:33:39,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-26 00:33:39,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:33:39,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:33:39,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 00:33:39,297 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:33:39,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:33:39,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1186186363, now seen corresponding path program 1 times [2020-10-26 00:33:39,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:33:39,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470481453] [2020-10-26 00:33:39,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:33:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:33:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:33:39,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470481453] [2020-10-26 00:33:39,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:33:39,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 00:33:39,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930920325] [2020-10-26 00:33:39,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 00:33:39,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:33:39,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 00:33:39,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 00:33:39,384 INFO L87 Difference]: Start difference. First operand 270 states and 760 transitions. Second operand 4 states. [2020-10-26 00:33:39,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:33:39,438 INFO L93 Difference]: Finished difference Result 273 states and 687 transitions. [2020-10-26 00:33:39,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 00:33:39,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-26 00:33:39,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:33:39,441 INFO L225 Difference]: With dead ends: 273 [2020-10-26 00:33:39,441 INFO L226 Difference]: Without dead ends: 209 [2020-10-26 00:33:39,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 00:33:39,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-26 00:33:39,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2020-10-26 00:33:39,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-26 00:33:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 516 transitions. [2020-10-26 00:33:39,451 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 516 transitions. Word has length 11 [2020-10-26 00:33:39,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:33:39,451 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 516 transitions. [2020-10-26 00:33:39,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 00:33:39,452 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 516 transitions. [2020-10-26 00:33:39,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-26 00:33:39,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:33:39,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:33:39,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 00:33:39,454 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:33:39,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:33:39,454 INFO L82 PathProgramCache]: Analyzing trace with hash -497822471, now seen corresponding path program 1 times [2020-10-26 00:33:39,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:33:39,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017366682] [2020-10-26 00:33:39,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:33:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:33:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:33:39,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017366682] [2020-10-26 00:33:39,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:33:39,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 00:33:39,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851605500] [2020-10-26 00:33:39,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 00:33:39,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:33:39,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 00:33:39,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 00:33:39,511 INFO L87 Difference]: Start difference. First operand 209 states and 516 transitions. Second operand 4 states. [2020-10-26 00:33:39,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:33:39,554 INFO L93 Difference]: Finished difference Result 303 states and 706 transitions. [2020-10-26 00:33:39,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 00:33:39,555 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-26 00:33:39,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:33:39,561 INFO L225 Difference]: With dead ends: 303 [2020-10-26 00:33:39,561 INFO L226 Difference]: Without dead ends: 223 [2020-10-26 00:33:39,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 00:33:39,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-26 00:33:39,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 199. [2020-10-26 00:33:39,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-26 00:33:39,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 470 transitions. [2020-10-26 00:33:39,572 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 470 transitions. Word has length 12 [2020-10-26 00:33:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:33:39,572 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 470 transitions. [2020-10-26 00:33:39,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 00:33:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 470 transitions. [2020-10-26 00:33:39,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-26 00:33:39,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:33:39,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:33:39,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 00:33:39,576 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:33:39,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:33:39,576 INFO L82 PathProgramCache]: Analyzing trace with hash -319232189, now seen corresponding path program 1 times [2020-10-26 00:33:39,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:33:39,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656508440] [2020-10-26 00:33:39,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:33:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:33:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:33:39,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656508440] [2020-10-26 00:33:39,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:33:39,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 00:33:39,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770673524] [2020-10-26 00:33:39,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 00:33:39,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:33:39,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 00:33:39,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 00:33:39,687 INFO L87 Difference]: Start difference. First operand 199 states and 470 transitions. Second operand 5 states. [2020-10-26 00:33:39,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:33:39,758 INFO L93 Difference]: Finished difference Result 171 states and 364 transitions. [2020-10-26 00:33:39,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 00:33:39,759 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-26 00:33:39,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:33:39,760 INFO L225 Difference]: With dead ends: 171 [2020-10-26 00:33:39,761 INFO L226 Difference]: Without dead ends: 134 [2020-10-26 00:33:39,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 00:33:39,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-26 00:33:39,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-10-26 00:33:39,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-26 00:33:39,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 280 transitions. [2020-10-26 00:33:39,768 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 280 transitions. Word has length 13 [2020-10-26 00:33:39,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:33:39,768 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 280 transitions. [2020-10-26 00:33:39,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 00:33:39,768 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 280 transitions. [2020-10-26 00:33:39,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-26 00:33:39,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:33:39,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:33:39,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 00:33:39,770 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:33:39,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:33:39,770 INFO L82 PathProgramCache]: Analyzing trace with hash 447753789, now seen corresponding path program 1 times [2020-10-26 00:33:39,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:33:39,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3882588] [2020-10-26 00:33:39,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:33:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:33:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:33:39,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3882588] [2020-10-26 00:33:39,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:33:39,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 00:33:39,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689797876] [2020-10-26 00:33:39,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 00:33:39,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:33:39,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 00:33:39,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 00:33:39,874 INFO L87 Difference]: Start difference. First operand 134 states and 280 transitions. Second operand 4 states. [2020-10-26 00:33:39,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:33:39,916 INFO L93 Difference]: Finished difference Result 177 states and 347 transitions. [2020-10-26 00:33:39,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 00:33:39,917 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-26 00:33:39,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:33:39,918 INFO L225 Difference]: With dead ends: 177 [2020-10-26 00:33:39,918 INFO L226 Difference]: Without dead ends: 130 [2020-10-26 00:33:39,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 00:33:39,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-26 00:33:39,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-10-26 00:33:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-26 00:33:39,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 248 transitions. [2020-10-26 00:33:39,925 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 248 transitions. Word has length 15 [2020-10-26 00:33:39,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:33:39,926 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 248 transitions. [2020-10-26 00:33:39,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 00:33:39,927 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 248 transitions. [2020-10-26 00:33:39,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-26 00:33:39,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:33:39,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:33:39,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 00:33:39,928 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:33:39,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:33:39,929 INFO L82 PathProgramCache]: Analyzing trace with hash 144030791, now seen corresponding path program 1 times [2020-10-26 00:33:39,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:33:39,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855017417] [2020-10-26 00:33:39,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:33:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:33:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:33:40,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855017417] [2020-10-26 00:33:40,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:33:40,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 00:33:40,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216996789] [2020-10-26 00:33:40,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 00:33:40,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:33:40,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 00:33:40,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 00:33:40,050 INFO L87 Difference]: Start difference. First operand 126 states and 248 transitions. Second operand 6 states. [2020-10-26 00:33:40,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:33:40,117 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2020-10-26 00:33:40,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 00:33:40,118 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-26 00:33:40,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:33:40,119 INFO L225 Difference]: With dead ends: 113 [2020-10-26 00:33:40,119 INFO L226 Difference]: Without dead ends: 37 [2020-10-26 00:33:40,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-26 00:33:40,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-26 00:33:40,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-26 00:33:40,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 00:33:40,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 57 transitions. [2020-10-26 00:33:40,122 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 57 transitions. Word has length 15 [2020-10-26 00:33:40,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:33:40,122 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 57 transitions. [2020-10-26 00:33:40,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 00:33:40,122 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 57 transitions. [2020-10-26 00:33:40,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 00:33:40,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:33:40,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:33:40,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 00:33:40,124 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:33:40,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:33:40,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1289085181, now seen corresponding path program 1 times [2020-10-26 00:33:40,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:33:40,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640377351] [2020-10-26 00:33:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:33:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:33:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:33:40,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640377351] [2020-10-26 00:33:40,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:33:40,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 00:33:40,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613498256] [2020-10-26 00:33:40,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 00:33:40,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:33:40,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 00:33:40,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 00:33:40,181 INFO L87 Difference]: Start difference. First operand 37 states and 57 transitions. Second operand 5 states. [2020-10-26 00:33:40,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:33:40,216 INFO L93 Difference]: Finished difference Result 36 states and 56 transitions. [2020-10-26 00:33:40,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 00:33:40,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-26 00:33:40,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:33:40,217 INFO L225 Difference]: With dead ends: 36 [2020-10-26 00:33:40,217 INFO L226 Difference]: Without dead ends: 0 [2020-10-26 00:33:40,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 00:33:40,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-26 00:33:40,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-26 00:33:40,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-26 00:33:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-26 00:33:40,218 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-10-26 00:33:40,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:33:40,219 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 00:33:40,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 00:33:40,219 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-26 00:33:40,219 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-26 00:33:40,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 00:33:40,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 12:33:40 BasicIcfg [2020-10-26 00:33:40,223 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-26 00:33:40,224 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 00:33:40,224 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 00:33:40,224 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 00:33:40,225 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 12:33:35" (3/4) ... [2020-10-26 00:33:40,229 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-26 00:33:40,235 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-10-26 00:33:40,236 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-10-26 00:33:40,236 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2020-10-26 00:33:40,241 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-10-26 00:33:40,241 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-26 00:33:40,242 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-26 00:33:40,242 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-26 00:33:40,291 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-26 00:33:40,291 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 00:33:40,295 INFO L168 Benchmark]: Toolchain (without parser) took 6083.10 ms. Allocated memory was 48.2 MB in the beginning and 104.9 MB in the end (delta: 56.6 MB). Free memory was 24.5 MB in the beginning and 79.9 MB in the end (delta: -55.4 MB). Peak memory consumption was 1.8 MB. Max. memory is 16.1 GB. [2020-10-26 00:33:40,297 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 39.8 MB. Free memory was 22.1 MB in the beginning and 22.1 MB in the end (delta: 23.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 00:33:40,298 INFO L168 Benchmark]: CACSL2BoogieTranslator took 718.81 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 23.9 MB in the beginning and 36.9 MB in the end (delta: -13.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-10-26 00:33:40,299 INFO L168 Benchmark]: Boogie Procedure Inliner took 102.58 ms. Allocated memory is still 58.7 MB. Free memory was 36.9 MB in the beginning and 35.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 00:33:40,299 INFO L168 Benchmark]: Boogie Preprocessor took 35.98 ms. Allocated memory is still 58.7 MB. Free memory was 35.1 MB in the beginning and 33.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 00:33:40,300 INFO L168 Benchmark]: RCFGBuilder took 652.27 ms. Allocated memory is still 58.7 MB. Free memory was 33.7 MB in the beginning and 26.0 MB in the end (delta: 7.8 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. [2020-10-26 00:33:40,303 INFO L168 Benchmark]: TraceAbstraction took 4489.20 ms. Allocated memory was 58.7 MB in the beginning and 104.9 MB in the end (delta: 46.1 MB). Free memory was 25.6 MB in the beginning and 83.0 MB in the end (delta: -57.4 MB). Peak memory consumption was 35.2 MB. Max. memory is 16.1 GB. [2020-10-26 00:33:40,304 INFO L168 Benchmark]: Witness Printer took 67.26 ms. Allocated memory is still 104.9 MB. Free memory was 82.0 MB in the beginning and 79.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 00:33:40,308 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 39.8 MB. Free memory was 22.1 MB in the beginning and 22.1 MB in the end (delta: 23.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 718.81 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 23.9 MB in the beginning and 36.9 MB in the end (delta: -13.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 102.58 ms. Allocated memory is still 58.7 MB. Free memory was 36.9 MB in the beginning and 35.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.98 ms. Allocated memory is still 58.7 MB. Free memory was 35.1 MB in the beginning and 33.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 652.27 ms. Allocated memory is still 58.7 MB. Free memory was 33.7 MB in the beginning and 26.0 MB in the end (delta: 7.8 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4489.20 ms. Allocated memory was 58.7 MB in the beginning and 104.9 MB in the end (delta: 46.1 MB). Free memory was 25.6 MB in the beginning and 83.0 MB in the end (delta: -57.4 MB). Peak memory consumption was 35.2 MB. Max. memory is 16.1 GB. * Witness Printer took 67.26 ms. Allocated memory is still 104.9 MB. Free memory was 82.0 MB in the beginning and 79.9 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 947 VarBasedMoverChecksPositive, 39 VarBasedMoverChecksNegative, 10 SemBasedMoverChecksPositive, 29 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.3s, 72 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.3s, 85 PlacesBefore, 32 PlacesAfterwards, 78 TransitionsBefore, 23 TransitionsAfterwards, 1440 CoEnabledTransitionPairs, 6 FixpointIterations, 17 TrivialSequentialCompositions, 42 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 10 ConcurrentYvCompositions, 2 ChoiceCompositions, 71 TotalNumberOfCompositions, 2814 MoverChecksTotal - PositiveResult [Line: 17]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.3s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 211 SDtfs, 164 SDslu, 310 SDs, 0 SdLazy, 117 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=362occurred 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, 9 MinimizatonAttempts, 28 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 102 ConstructedInterpolants, 0 QuantifiedInterpolants, 3478 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...