./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe021_tso.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a5eb5378-24e1-45a5-9f09-9b9906d373e6/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a5eb5378-24e1-45a5-9f09-9b9906d373e6/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a5eb5378-24e1-45a5-9f09-9b9906d373e6/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a5eb5378-24e1-45a5-9f09-9b9906d373e6/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe021_tso.oepc.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a5eb5378-24e1-45a5-9f09-9b9906d373e6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a5eb5378-24e1-45a5-9f09-9b9906d373e6/bin/uautomizer --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 4ac9fb7ba9629726b891659a82add33d1f818961 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:43:20,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:43:20,598 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:43:20,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:43:20,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:43:20,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:43:20,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:43:20,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:43:20,747 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:43:20,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:43:20,758 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:43:20,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:43:20,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:43:20,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:43:20,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:43:20,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:43:20,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:43:20,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:43:20,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:43:20,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:43:20,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:43:20,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:43:20,802 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:43:20,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:43:20,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:43:20,816 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:43:20,816 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:43:20,819 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:43:20,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:43:20,822 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:43:20,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:43:20,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:43:20,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:43:20,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:43:20,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:43:20,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:43:20,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:43:20,834 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:43:20,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:43:20,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:43:20,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:43:20,840 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a5eb5378-24e1-45a5-9f09-9b9906d373e6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 00:43:20,896 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:43:20,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:43:20,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:43:20,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:43:20,900 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:43:20,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:43:20,901 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:43:20,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:43:20,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:43:20,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:43:20,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 00:43:20,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:43:20,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 00:43:20,904 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:43:20,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:43:20,905 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:43:20,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 00:43:20,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:43:20,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:43:20,906 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:43:20,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:43:20,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:43:20,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:43:20,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:43:20,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 00:43:20,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:43:20,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 00:43:20,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 00:43:20,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:43:20,909 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:/tmp/vcloud-vcloud-master/worker/run_dir_a5eb5378-24e1-45a5-9f09-9b9906d373e6/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a5eb5378-24e1-45a5-9f09-9b9906d373e6/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ac9fb7ba9629726b891659a82add33d1f818961 [2020-11-30 00:43:21,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:43:21,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:43:21,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:43:21,337 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:43:21,338 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:43:21,340 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a5eb5378-24e1-45a5-9f09-9b9906d373e6/bin/uautomizer/../../sv-benchmarks/c/pthread-wmm/safe021_tso.oepc.i [2020-11-30 00:43:21,456 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a5eb5378-24e1-45a5-9f09-9b9906d373e6/bin/uautomizer/data/4ec9111ca/d10c67da7fcb467cbe5c3cb8c73c6f66/FLAGbbb343dea [2020-11-30 00:43:22,380 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:43:22,382 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a5eb5378-24e1-45a5-9f09-9b9906d373e6/sv-benchmarks/c/pthread-wmm/safe021_tso.oepc.i [2020-11-30 00:43:22,415 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a5eb5378-24e1-45a5-9f09-9b9906d373e6/bin/uautomizer/data/4ec9111ca/d10c67da7fcb467cbe5c3cb8c73c6f66/FLAGbbb343dea [2020-11-30 00:43:22,553 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a5eb5378-24e1-45a5-9f09-9b9906d373e6/bin/uautomizer/data/4ec9111ca/d10c67da7fcb467cbe5c3cb8c73c6f66 [2020-11-30 00:43:22,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:43:22,559 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:43:22,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:43:22,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:43:22,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:43:22,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:43:22" (1/1) ... [2020-11-30 00:43:22,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@195085b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:43:22, skipping insertion in model container [2020-11-30 00:43:22,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:43:22" (1/1) ... [2020-11-30 00:43:22,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:43:22,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:43:23,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:43:23,382 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:43:23,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:43:23,563 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:43:23,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:43:23 WrapperNode [2020-11-30 00:43:23,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:43:23,568 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:43:23,568 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:43:23,568 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:43:23,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:43:23" (1/1) ... [2020-11-30 00:43:23,637 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:43:23" (1/1) ... [2020-11-30 00:43:23,677 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:43:23,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:43:23,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:43:23,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:43:23,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:43:23" (1/1) ... [2020-11-30 00:43:23,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:43:23" (1/1) ... [2020-11-30 00:43:23,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:43:23" (1/1) ... [2020-11-30 00:43:23,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:43:23" (1/1) ... [2020-11-30 00:43:23,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:43:23" (1/1) ... [2020-11-30 00:43:23,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:43:23" (1/1) ... [2020-11-30 00:43:23,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:43:23" (1/1) ... [2020-11-30 00:43:23,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:43:23,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:43:23,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:43:23,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:43:23,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:43:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5eb5378-24e1-45a5-9f09-9b9906d373e6/bin/uautomizer/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 [2020-11-30 00:43:23,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 00:43:23,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-30 00:43:23,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:43:23,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 00:43:23,881 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-11-30 00:43:23,881 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-11-30 00:43:23,882 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-11-30 00:43:23,882 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-11-30 00:43:23,882 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-11-30 00:43:23,883 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-11-30 00:43:23,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:43:23,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-30 00:43:23,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:43:23,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:43:23,887 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-30 00:43:24,723 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:43:24,724 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-30 00:43:24,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:43:24 BoogieIcfgContainer [2020-11-30 00:43:24,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:43:24,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:43:24,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:43:24,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:43:24,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:43:22" (1/3) ... [2020-11-30 00:43:24,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257e8c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:43:24, skipping insertion in model container [2020-11-30 00:43:24,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:43:23" (2/3) ... [2020-11-30 00:43:24,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257e8c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:43:24, skipping insertion in model container [2020-11-30 00:43:24,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:43:24" (3/3) ... [2020-11-30 00:43:24,749 INFO L111 eAbstractionObserver]: Analyzing ICFG safe021_tso.oepc.i [2020-11-30 00:43:24,765 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-30 00:43:24,766 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:43:24,773 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 00:43:24,774 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-30 00:43:24,832 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,832 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,833 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,833 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,833 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,833 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,834 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,834 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,834 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,835 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,835 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,835 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,836 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,836 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,836 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,836 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,837 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,837 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,840 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,841 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,841 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,841 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,848 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,848 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,848 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,849 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,855 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,856 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,856 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,856 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-30 00:43:24,859 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-30 00:43:24,875 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-30 00:43:24,903 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:43:24,903 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 00:43:24,903 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:43:24,903 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:43:24,904 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:43:24,904 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:43:24,904 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:43:24,904 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:43:24,919 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-30 00:43:24,921 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 79 transitions, 173 flow [2020-11-30 00:43:24,925 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 79 transitions, 173 flow [2020-11-30 00:43:24,927 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 86 places, 79 transitions, 173 flow [2020-11-30 00:43:24,976 INFO L129 PetriNetUnfolder]: 3/76 cut-off events. [2020-11-30 00:43:24,976 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-30 00:43:24,981 INFO L80 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 76 events. 3/76 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. 0/72 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2020-11-30 00:43:24,986 INFO L116 LiptonReduction]: Number of co-enabled transitions 1440 [2020-11-30 00:43:25,834 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-11-30 00:43:28,278 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-11-30 00:43:28,444 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-30 00:43:28,578 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-11-30 00:43:29,028 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-11-30 00:43:29,185 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-30 00:43:29,242 INFO L131 LiptonReduction]: Checked pairs total: 3181 [2020-11-30 00:43:29,243 INFO L133 LiptonReduction]: Total number of compositions: 74 [2020-11-30 00:43:29,248 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 22 transitions, 59 flow [2020-11-30 00:43:29,282 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 298 states. [2020-11-30 00:43:29,284 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states. [2020-11-30 00:43:29,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 00:43:29,292 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:43:29,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:43:29,293 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:43:29,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:43:29,299 INFO L82 PathProgramCache]: Analyzing trace with hash 2101373786, now seen corresponding path program 1 times [2020-11-30 00:43:29,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:43:29,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966290848] [2020-11-30 00:43:29,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:43:29,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:43:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:43:29,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966290848] [2020-11-30 00:43:29,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:43:29,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 00:43:29,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966858296] [2020-11-30 00:43:29,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:43:29,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:43:29,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:43:29,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:43:29,647 INFO L87 Difference]: Start difference. First operand 298 states. Second operand 3 states. [2020-11-30 00:43:29,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:43:29,742 INFO L93 Difference]: Finished difference Result 290 states and 834 transitions. [2020-11-30 00:43:29,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:43:29,745 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-30 00:43:29,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:43:29,775 INFO L225 Difference]: With dead ends: 290 [2020-11-30 00:43:29,775 INFO L226 Difference]: Without dead ends: 226 [2020-11-30 00:43:29,777 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 [2020-11-30 00:43:29,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-11-30 00:43:29,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2020-11-30 00:43:29,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-11-30 00:43:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 626 transitions. [2020-11-30 00:43:29,912 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 626 transitions. Word has length 8 [2020-11-30 00:43:29,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:43:29,917 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 626 transitions. [2020-11-30 00:43:29,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:43:29,919 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 626 transitions. [2020-11-30 00:43:29,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 00:43:29,922 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:43:29,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:43:29,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 00:43:29,924 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:43:29,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:43:29,929 INFO L82 PathProgramCache]: Analyzing trace with hash 718863785, now seen corresponding path program 1 times [2020-11-30 00:43:29,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:43:29,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489529941] [2020-11-30 00:43:29,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:43:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:43:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:43:30,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489529941] [2020-11-30 00:43:30,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:43:30,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 00:43:30,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087765189] [2020-11-30 00:43:30,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:43:30,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:43:30,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:43:30,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:43:30,094 INFO L87 Difference]: Start difference. First operand 226 states and 626 transitions. Second operand 3 states. [2020-11-30 00:43:30,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:43:30,109 INFO L93 Difference]: Finished difference Result 212 states and 578 transitions. [2020-11-30 00:43:30,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:43:30,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-30 00:43:30,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:43:30,113 INFO L225 Difference]: With dead ends: 212 [2020-11-30 00:43:30,114 INFO L226 Difference]: Without dead ends: 212 [2020-11-30 00:43:30,115 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 [2020-11-30 00:43:30,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-11-30 00:43:30,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2020-11-30 00:43:30,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-11-30 00:43:30,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 578 transitions. [2020-11-30 00:43:30,157 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 578 transitions. Word has length 9 [2020-11-30 00:43:30,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:43:30,157 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 578 transitions. [2020-11-30 00:43:30,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:43:30,158 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 578 transitions. [2020-11-30 00:43:30,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 00:43:30,160 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:43:30,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:43:30,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 00:43:30,161 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:43:30,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:43:30,162 INFO L82 PathProgramCache]: Analyzing trace with hash 809939624, now seen corresponding path program 1 times [2020-11-30 00:43:30,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:43:30,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59472266] [2020-11-30 00:43:30,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:43:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:43:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:43:30,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59472266] [2020-11-30 00:43:30,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:43:30,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 00:43:30,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584943691] [2020-11-30 00:43:30,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:43:30,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:43:30,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:43:30,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:43:30,279 INFO L87 Difference]: Start difference. First operand 212 states and 578 transitions. Second operand 4 states. [2020-11-30 00:43:30,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:43:30,330 INFO L93 Difference]: Finished difference Result 242 states and 634 transitions. [2020-11-30 00:43:30,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:43:30,334 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-30 00:43:30,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:43:30,337 INFO L225 Difference]: With dead ends: 242 [2020-11-30 00:43:30,337 INFO L226 Difference]: Without dead ends: 146 [2020-11-30 00:43:30,338 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 [2020-11-30 00:43:30,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-30 00:43:30,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2020-11-30 00:43:30,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-11-30 00:43:30,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-11-30 00:43:30,353 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 10 [2020-11-30 00:43:30,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:43:30,354 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-11-30 00:43:30,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:43:30,354 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-11-30 00:43:30,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 00:43:30,356 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:43:30,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:43:30,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 00:43:30,357 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:43:30,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:43:30,358 INFO L82 PathProgramCache]: Analyzing trace with hash -676988276, now seen corresponding path program 1 times [2020-11-30 00:43:30,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:43:30,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209911690] [2020-11-30 00:43:30,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:43:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:43:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:43:30,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209911690] [2020-11-30 00:43:30,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:43:30,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 00:43:30,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817337981] [2020-11-30 00:43:30,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:43:30,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:43:30,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:43:30,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:43:30,549 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 4 states. [2020-11-30 00:43:30,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:43:30,646 INFO L93 Difference]: Finished difference Result 165 states and 377 transitions. [2020-11-30 00:43:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 00:43:30,649 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-30 00:43:30,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:43:30,651 INFO L225 Difference]: With dead ends: 165 [2020-11-30 00:43:30,651 INFO L226 Difference]: Without dead ends: 125 [2020-11-30 00:43:30,652 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 [2020-11-30 00:43:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-11-30 00:43:30,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-11-30 00:43:30,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-11-30 00:43:30,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 284 transitions. [2020-11-30 00:43:30,668 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 284 transitions. Word has length 11 [2020-11-30 00:43:30,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:43:30,668 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 284 transitions. [2020-11-30 00:43:30,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:43:30,669 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 284 transitions. [2020-11-30 00:43:30,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 00:43:30,670 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:43:30,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:43:30,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 00:43:30,671 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:43:30,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:43:30,672 INFO L82 PathProgramCache]: Analyzing trace with hash 524604256, now seen corresponding path program 1 times [2020-11-30 00:43:30,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:43:30,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299743259] [2020-11-30 00:43:30,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:43:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:43:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:43:30,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299743259] [2020-11-30 00:43:30,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:43:30,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:43:30,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538249297] [2020-11-30 00:43:30,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 00:43:30,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:43:30,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 00:43:30,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:43:30,831 INFO L87 Difference]: Start difference. First operand 125 states and 284 transitions. Second operand 5 states. [2020-11-30 00:43:30,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:43:30,916 INFO L93 Difference]: Finished difference Result 122 states and 258 transitions. [2020-11-30 00:43:30,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 00:43:30,923 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-30 00:43:30,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:43:30,924 INFO L225 Difference]: With dead ends: 122 [2020-11-30 00:43:30,925 INFO L226 Difference]: Without dead ends: 97 [2020-11-30 00:43:30,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-30 00:43:30,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-30 00:43:30,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-11-30 00:43:30,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-30 00:43:30,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 202 transitions. [2020-11-30 00:43:30,932 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 202 transitions. Word has length 12 [2020-11-30 00:43:30,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:43:30,932 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 202 transitions. [2020-11-30 00:43:30,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 00:43:30,933 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 202 transitions. [2020-11-30 00:43:30,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 00:43:30,943 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:43:30,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:43:30,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 00:43:30,944 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:43:30,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:43:30,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1603145941, now seen corresponding path program 1 times [2020-11-30 00:43:30,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:43:30,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358735446] [2020-11-30 00:43:30,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:43:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:43:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:43:31,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358735446] [2020-11-30 00:43:31,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:43:31,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:43:31,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948427862] [2020-11-30 00:43:31,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 00:43:31,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:43:31,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 00:43:31,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-30 00:43:31,116 INFO L87 Difference]: Start difference. First operand 97 states and 202 transitions. Second operand 6 states. [2020-11-30 00:43:31,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:43:31,189 INFO L93 Difference]: Finished difference Result 92 states and 190 transitions. [2020-11-30 00:43:31,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 00:43:31,190 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-11-30 00:43:31,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:43:31,191 INFO L225 Difference]: With dead ends: 92 [2020-11-30 00:43:31,192 INFO L226 Difference]: Without dead ends: 84 [2020-11-30 00:43:31,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-30 00:43:31,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-30 00:43:31,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-11-30 00:43:31,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-30 00:43:31,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 176 transitions. [2020-11-30 00:43:31,197 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 176 transitions. Word has length 14 [2020-11-30 00:43:31,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:43:31,198 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 176 transitions. [2020-11-30 00:43:31,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 00:43:31,198 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 176 transitions. [2020-11-30 00:43:31,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 00:43:31,200 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:43:31,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:43:31,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-30 00:43:31,201 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:43:31,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:43:31,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1724594669, now seen corresponding path program 1 times [2020-11-30 00:43:31,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:43:31,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123355575] [2020-11-30 00:43:31,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:43:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:43:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:43:31,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123355575] [2020-11-30 00:43:31,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:43:31,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:43:31,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926174480] [2020-11-30 00:43:31,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:43:31,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:43:31,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:43:31,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:43:31,328 INFO L87 Difference]: Start difference. First operand 84 states and 176 transitions. Second operand 4 states. [2020-11-30 00:43:31,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:43:31,375 INFO L93 Difference]: Finished difference Result 97 states and 197 transitions. [2020-11-30 00:43:31,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:43:31,376 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-11-30 00:43:31,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:43:31,377 INFO L225 Difference]: With dead ends: 97 [2020-11-30 00:43:31,377 INFO L226 Difference]: Without dead ends: 36 [2020-11-30 00:43:31,377 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 [2020-11-30 00:43:31,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-30 00:43:31,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-30 00:43:31,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-30 00:43:31,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 56 transitions. [2020-11-30 00:43:31,380 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 56 transitions. Word has length 17 [2020-11-30 00:43:31,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:43:31,380 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 56 transitions. [2020-11-30 00:43:31,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:43:31,380 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 56 transitions. [2020-11-30 00:43:31,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 00:43:31,381 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:43:31,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:43:31,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-30 00:43:31,382 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:43:31,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:43:31,383 INFO L82 PathProgramCache]: Analyzing trace with hash -737350579, now seen corresponding path program 2 times [2020-11-30 00:43:31,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:43:31,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235612116] [2020-11-30 00:43:31,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:43:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:43:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:43:31,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235612116] [2020-11-30 00:43:31,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:43:31,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 00:43:31,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731961567] [2020-11-30 00:43:31,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:43:31,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:43:31,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:43:31,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:43:31,494 INFO L87 Difference]: Start difference. First operand 36 states and 56 transitions. Second operand 3 states. [2020-11-30 00:43:31,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:43:31,512 INFO L93 Difference]: Finished difference Result 35 states and 55 transitions. [2020-11-30 00:43:31,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:43:31,514 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-11-30 00:43:31,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:43:31,514 INFO L225 Difference]: With dead ends: 35 [2020-11-30 00:43:31,514 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 00:43:31,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:43:31,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 00:43:31,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 00:43:31,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 00:43:31,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 00:43:31,515 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-11-30 00:43:31,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:43:31,516 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:43:31,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:43:31,516 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 00:43:31,516 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 00:43:31,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-30 00:43:31,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:43:31 BasicIcfg [2020-11-30 00:43:31,521 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:43:31,521 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:43:31,521 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:43:31,522 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:43:31,529 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:43:24" (3/4) ... [2020-11-30 00:43:31,535 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 00:43:31,543 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-11-30 00:43:31,544 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-11-30 00:43:31,544 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2020-11-30 00:43:31,550 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-11-30 00:43:31,551 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 00:43:31,551 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 00:43:31,551 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 00:43:31,613 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a5eb5378-24e1-45a5-9f09-9b9906d373e6/bin/uautomizer/witness.graphml [2020-11-30 00:43:31,617 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:43:31,620 INFO L168 Benchmark]: Toolchain (without parser) took 9060.04 ms. Allocated memory was 100.7 MB in the beginning and 148.9 MB in the end (delta: 48.2 MB). Free memory was 71.2 MB in the beginning and 63.4 MB in the end (delta: 7.8 MB). Peak memory consumption was 56.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:43:31,620 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 100.7 MB. Free memory is still 61.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:43:31,621 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1005.11 ms. Allocated memory is still 100.7 MB. Free memory was 71.0 MB in the beginning and 55.6 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-30 00:43:31,623 INFO L168 Benchmark]: Boogie Procedure Inliner took 109.87 ms. Allocated memory is still 100.7 MB. Free memory was 55.6 MB in the beginning and 53.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:43:31,627 INFO L168 Benchmark]: Boogie Preprocessor took 74.80 ms. Allocated memory is still 100.7 MB. Free memory was 53.8 MB in the beginning and 52.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:43:31,628 INFO L168 Benchmark]: RCFGBuilder took 971.32 ms. Allocated memory was 100.7 MB in the beginning and 123.7 MB in the end (delta: 23.1 MB). Free memory was 52.5 MB in the beginning and 84.9 MB in the end (delta: -32.4 MB). Peak memory consumption was 12.5 MB. Max. memory is 16.1 GB. [2020-11-30 00:43:31,629 INFO L168 Benchmark]: TraceAbstraction took 6791.29 ms. Allocated memory was 123.7 MB in the beginning and 148.9 MB in the end (delta: 25.2 MB). Free memory was 84.2 MB in the beginning and 66.5 MB in the end (delta: 17.7 MB). Peak memory consumption was 42.7 MB. Max. memory is 16.1 GB. [2020-11-30 00:43:31,629 INFO L168 Benchmark]: Witness Printer took 96.53 ms. Allocated memory is still 148.9 MB. Free memory was 66.5 MB in the beginning and 63.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-30 00:43:31,633 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 100.7 MB. Free memory is still 61.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1005.11 ms. Allocated memory is still 100.7 MB. Free memory was 71.0 MB in the beginning and 55.6 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 109.87 ms. Allocated memory is still 100.7 MB. Free memory was 55.6 MB in the beginning and 53.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 74.80 ms. Allocated memory is still 100.7 MB. Free memory was 53.8 MB in the beginning and 52.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 971.32 ms. Allocated memory was 100.7 MB in the beginning and 123.7 MB in the end (delta: 23.1 MB). Free memory was 52.5 MB in the beginning and 84.9 MB in the end (delta: -32.4 MB). Peak memory consumption was 12.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6791.29 ms. Allocated memory was 123.7 MB in the beginning and 148.9 MB in the end (delta: 25.2 MB). Free memory was 84.2 MB in the beginning and 66.5 MB in the end (delta: 17.7 MB). Peak memory consumption was 42.7 MB. Max. memory is 16.1 GB. * Witness Printer took 96.53 ms. Allocated memory is still 148.9 MB. Free memory was 66.5 MB in the beginning and 63.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1029 VarBasedMoverChecksPositive, 54 VarBasedMoverChecksNegative, 11 SemBasedMoverChecksPositive, 43 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.6s, 93 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 4.3s, 86 PlacesBefore, 31 PlacesAfterwards, 79 TransitionsBefore, 22 TransitionsAfterwards, 1440 CoEnabledTransitionPairs, 6 FixpointIterations, 18 TrivialSequentialCompositions, 43 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 2 ChoiceCompositions, 74 TotalNumberOfCompositions, 3181 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, 77 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.6s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.3s, HoareTripleCheckerStatistics: 152 SDtfs, 131 SDslu, 192 SDs, 0 SdLazy, 98 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s 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: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 90 ConstructedInterpolants, 0 QuantifiedInterpolants, 2996 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...