./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/safe026_tso.opt.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_32674d1e-8dec-4715-87b6-e423169159cd/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_32674d1e-8dec-4715-87b6-e423169159cd/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_32674d1e-8dec-4715-87b6-e423169159cd/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_32674d1e-8dec-4715-87b6-e423169159cd/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/safe026_tso.opt.i -s /tmp/vcloud-vcloud-master/worker/run_dir_32674d1e-8dec-4715-87b6-e423169159cd/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_32674d1e-8dec-4715-87b6-e423169159cd/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 61c36ba3335be4dbf8406139d3018a47ee4afc02 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:56:26,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:56:26,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:56:26,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:56:26,670 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:56:26,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:56:26,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:56:26,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:56:26,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:56:26,697 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:56:26,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:56:26,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:56:26,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:56:26,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:56:26,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:56:26,708 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:56:26,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:56:26,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:56:26,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:56:26,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:56:26,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:56:26,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:56:26,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:56:26,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:56:26,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:56:26,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:56:26,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:56:26,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:56:26,740 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:56:26,741 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:56:26,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:56:26,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:56:26,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:56:26,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:56:26,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:56:26,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:56:26,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:56:26,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:56:26,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:56:26,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:56:26,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:56:26,753 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_32674d1e-8dec-4715-87b6-e423169159cd/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:56:26,802 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:56:26,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:56:26,803 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:56:26,804 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:56:26,804 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:56:26,804 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:56:26,804 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:56:26,804 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:56:26,805 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:56:26,805 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:56:26,806 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:56:26,806 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:56:26,806 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:56:26,807 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:56:26,807 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:56:26,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:56:26,808 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:56:26,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:56:26,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:56:26,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:56:26,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:56:26,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:56:26,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:56:26,809 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:56:26,810 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:56:26,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:56:26,810 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:56:26,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:56:26,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:56:26,812 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:56:26,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:56:26,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:56:26,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:56:26,813 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:56:26,814 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:56:26,814 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:56:26,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:56:26,814 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:56:26,815 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:56:26,815 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:56:26,815 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_32674d1e-8dec-4715-87b6-e423169159cd/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_32674d1e-8dec-4715-87b6-e423169159cd/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61c36ba3335be4dbf8406139d3018a47ee4afc02 [2020-11-22 12:56:27,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:56:27,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:56:27,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:56:27,132 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:56:27,133 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:56:27,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_32674d1e-8dec-4715-87b6-e423169159cd/bin/utaipan/../../sv-benchmarks/c/pthread-wmm/safe026_tso.opt.i [2020-11-22 12:56:27,222 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_32674d1e-8dec-4715-87b6-e423169159cd/bin/utaipan/data/8533f2d26/580965eda421444e9be30123d7778261/FLAGabb0b6fca [2020-11-22 12:56:27,850 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:56:27,851 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_32674d1e-8dec-4715-87b6-e423169159cd/sv-benchmarks/c/pthread-wmm/safe026_tso.opt.i [2020-11-22 12:56:27,888 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_32674d1e-8dec-4715-87b6-e423169159cd/bin/utaipan/data/8533f2d26/580965eda421444e9be30123d7778261/FLAGabb0b6fca [2020-11-22 12:56:28,121 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_32674d1e-8dec-4715-87b6-e423169159cd/bin/utaipan/data/8533f2d26/580965eda421444e9be30123d7778261 [2020-11-22 12:56:28,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:56:28,126 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:56:28,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:56:28,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:56:28,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:56:28,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:56:28" (1/1) ... [2020-11-22 12:56:28,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a18b5a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:28, skipping insertion in model container [2020-11-22 12:56:28,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:56:28" (1/1) ... [2020-11-22 12:56:28,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:56:28,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:56:28,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:56:28,594 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:56:28,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:56:28,793 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:56:28,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:28 WrapperNode [2020-11-22 12:56:28,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:56:28,797 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:56:28,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:56:28,798 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:56:28,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:28" (1/1) ... [2020-11-22 12:56:28,845 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:28" (1/1) ... [2020-11-22 12:56:28,871 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:56:28,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:56:28,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:56:28,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:56:28,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:28" (1/1) ... [2020-11-22 12:56:28,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:28" (1/1) ... [2020-11-22 12:56:28,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:28" (1/1) ... [2020-11-22 12:56:28,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:28" (1/1) ... [2020-11-22 12:56:28,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:28" (1/1) ... [2020-11-22 12:56:28,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:28" (1/1) ... [2020-11-22 12:56:28,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:28" (1/1) ... [2020-11-22 12:56:28,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:56:28,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:56:28,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:56:28,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:56:28,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_32674d1e-8dec-4715-87b6-e423169159cd/bin/utaipan/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 [2020-11-22 12:56:28,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 12:56:28,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-22 12:56:28,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:56:28,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 12:56:28,997 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-11-22 12:56:28,997 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-11-22 12:56:28,998 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-11-22 12:56:28,998 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-11-22 12:56:28,998 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-11-22 12:56:28,998 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-11-22 12:56:28,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:56:28,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-22 12:56:28,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:56:28,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:56:29,001 WARN L208 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-22 12:56:29,628 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:56:29,628 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-22 12:56:29,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:56:29 BoogieIcfgContainer [2020-11-22 12:56:29,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:56:29,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:56:29,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:56:29,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:56:29,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:56:28" (1/3) ... [2020-11-22 12:56:29,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21fdb286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:56:29, skipping insertion in model container [2020-11-22 12:56:29,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:28" (2/3) ... [2020-11-22 12:56:29,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21fdb286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:56:29, skipping insertion in model container [2020-11-22 12:56:29,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:56:29" (3/3) ... [2020-11-22 12:56:29,643 INFO L111 eAbstractionObserver]: Analyzing ICFG safe026_tso.opt.i [2020-11-22 12:56:29,656 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-22 12:56:29,656 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:56:29,662 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 12:56:29,663 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-22 12:56:29,712 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,713 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,713 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,713 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,714 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,714 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,715 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,716 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,716 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,716 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,717 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,717 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,718 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,718 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,719 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,720 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,721 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,721 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,726 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,726 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,727 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,727 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,737 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,737 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,737 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,738 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,745 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,745 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,746 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,746 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-22 12:56:29,749 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-22 12:56:29,764 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-22 12:56:29,803 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:56:29,803 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:56:29,803 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:56:29,803 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:56:29,804 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:56:29,804 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:56:29,804 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:56:29,804 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:56:29,823 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-22 12:56:29,825 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 77 transitions, 169 flow [2020-11-22 12:56:29,829 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 77 transitions, 169 flow [2020-11-22 12:56:29,831 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 84 places, 77 transitions, 169 flow [2020-11-22 12:56:29,897 INFO L129 PetriNetUnfolder]: 3/74 cut-off events. [2020-11-22 12:56:29,897 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-22 12:56:29,902 INFO L80 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 74 events. 3/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 59 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 59. Up to 2 conditions per place. [2020-11-22 12:56:29,906 INFO L116 LiptonReduction]: Number of co-enabled transitions 1348 [2020-11-22 12:56:30,171 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-11-22 12:56:32,106 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-22 12:56:32,414 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-11-22 12:56:32,519 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-11-22 12:56:32,547 INFO L131 LiptonReduction]: Checked pairs total: 2469 [2020-11-22 12:56:32,547 INFO L133 LiptonReduction]: Total number of compositions: 72 [2020-11-22 12:56:32,553 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 22 transitions, 59 flow [2020-11-22 12:56:32,578 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 274 states. [2020-11-22 12:56:32,580 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states. [2020-11-22 12:56:32,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 12:56:32,586 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:56:32,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:56:32,587 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:56:32,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:56:32,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1935178246, now seen corresponding path program 1 times [2020-11-22 12:56:32,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:56:32,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918726684] [2020-11-22 12:56:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:56:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:56:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:56:32,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918726684] [2020-11-22 12:56:32,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:56:32,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:56:32,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975732932] [2020-11-22 12:56:32,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 12:56:32,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:56:32,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 12:56:32,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 12:56:32,818 INFO L87 Difference]: Start difference. First operand 274 states. Second operand 2 states. [2020-11-22 12:56:32,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:56:32,851 INFO L93 Difference]: Finished difference Result 274 states and 786 transitions. [2020-11-22 12:56:32,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 12:56:32,853 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-22 12:56:32,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:56:32,870 INFO L225 Difference]: With dead ends: 274 [2020-11-22 12:56:32,870 INFO L226 Difference]: Without dead ends: 226 [2020-11-22 12:56:32,871 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 [2020-11-22 12:56:32,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-11-22 12:56:32,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2020-11-22 12:56:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-11-22 12:56:32,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 634 transitions. [2020-11-22 12:56:32,946 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 634 transitions. Word has length 8 [2020-11-22 12:56:32,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:56:32,947 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 634 transitions. [2020-11-22 12:56:32,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 12:56:32,948 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 634 transitions. [2020-11-22 12:56:32,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 12:56:32,949 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:56:32,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:56:32,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:56:32,950 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:56:32,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:56:32,951 INFO L82 PathProgramCache]: Analyzing trace with hash -139024564, now seen corresponding path program 1 times [2020-11-22 12:56:32,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:56:32,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332991880] [2020-11-22 12:56:32,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:56:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:56:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:56:33,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332991880] [2020-11-22 12:56:33,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:56:33,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:56:33,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615124040] [2020-11-22 12:56:33,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:56:33,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:56:33,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:56:33,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:56:33,072 INFO L87 Difference]: Start difference. First operand 226 states and 634 transitions. Second operand 3 states. [2020-11-22 12:56:33,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:56:33,112 INFO L93 Difference]: Finished difference Result 172 states and 418 transitions. [2020-11-22 12:56:33,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:56:33,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-22 12:56:33,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:56:33,118 INFO L225 Difference]: With dead ends: 172 [2020-11-22 12:56:33,122 INFO L226 Difference]: Without dead ends: 172 [2020-11-22 12:56:33,123 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 [2020-11-22 12:56:33,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-11-22 12:56:33,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-11-22 12:56:33,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-11-22 12:56:33,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 418 transitions. [2020-11-22 12:56:33,163 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 418 transitions. Word has length 9 [2020-11-22 12:56:33,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:56:33,163 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 418 transitions. [2020-11-22 12:56:33,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:56:33,164 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 418 transitions. [2020-11-22 12:56:33,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 12:56:33,167 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:56:33,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:56:33,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 12:56:33,168 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:56:33,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:56:33,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1635413154, now seen corresponding path program 1 times [2020-11-22 12:56:33,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:56:33,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045108876] [2020-11-22 12:56:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:56:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:56:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:56:33,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045108876] [2020-11-22 12:56:33,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:56:33,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:56:33,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024560670] [2020-11-22 12:56:33,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:56:33,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:56:33,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:56:33,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:56:33,272 INFO L87 Difference]: Start difference. First operand 172 states and 418 transitions. Second operand 4 states. [2020-11-22 12:56:33,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:56:33,299 INFO L93 Difference]: Finished difference Result 109 states and 229 transitions. [2020-11-22 12:56:33,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:56:33,300 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-22 12:56:33,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:56:33,302 INFO L225 Difference]: With dead ends: 109 [2020-11-22 12:56:33,302 INFO L226 Difference]: Without dead ends: 109 [2020-11-22 12:56:33,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:56:33,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-22 12:56:33,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-11-22 12:56:33,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-22 12:56:33,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 229 transitions. [2020-11-22 12:56:33,312 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 229 transitions. Word has length 11 [2020-11-22 12:56:33,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:56:33,313 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 229 transitions. [2020-11-22 12:56:33,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:56:33,313 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 229 transitions. [2020-11-22 12:56:33,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-22 12:56:33,315 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:56:33,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:56:33,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 12:56:33,315 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:56:33,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:56:33,316 INFO L82 PathProgramCache]: Analyzing trace with hash 395532943, now seen corresponding path program 1 times [2020-11-22 12:56:33,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:56:33,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378220193] [2020-11-22 12:56:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:56:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:56:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:56:33,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378220193] [2020-11-22 12:56:33,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:56:33,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 12:56:33,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965930985] [2020-11-22 12:56:33,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:56:33,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:56:33,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:56:33,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:56:33,447 INFO L87 Difference]: Start difference. First operand 109 states and 229 transitions. Second operand 5 states. [2020-11-22 12:56:33,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:56:33,490 INFO L93 Difference]: Finished difference Result 85 states and 181 transitions. [2020-11-22 12:56:33,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:56:33,491 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-22 12:56:33,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:56:33,492 INFO L225 Difference]: With dead ends: 85 [2020-11-22 12:56:33,492 INFO L226 Difference]: Without dead ends: 85 [2020-11-22 12:56:33,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:56:33,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-22 12:56:33,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-11-22 12:56:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-22 12:56:33,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 181 transitions. [2020-11-22 12:56:33,502 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 181 transitions. Word has length 14 [2020-11-22 12:56:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:56:33,503 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 181 transitions. [2020-11-22 12:56:33,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:56:33,503 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 181 transitions. [2020-11-22 12:56:33,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-22 12:56:33,506 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:56:33,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:56:33,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 12:56:33,509 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:56:33,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:56:33,510 INFO L82 PathProgramCache]: Analyzing trace with hash 781717809, now seen corresponding path program 1 times [2020-11-22 12:56:33,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:56:33,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256372102] [2020-11-22 12:56:33,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:56:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:56:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:56:33,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256372102] [2020-11-22 12:56:33,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:56:33,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:56:33,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109747311] [2020-11-22 12:56:33,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:56:33,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:56:33,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:56:33,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:56:33,657 INFO L87 Difference]: Start difference. First operand 85 states and 181 transitions. Second operand 4 states. [2020-11-22 12:56:33,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:56:33,697 INFO L93 Difference]: Finished difference Result 111 states and 227 transitions. [2020-11-22 12:56:33,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:56:33,698 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-11-22 12:56:33,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:56:33,699 INFO L225 Difference]: With dead ends: 111 [2020-11-22 12:56:33,699 INFO L226 Difference]: Without dead ends: 61 [2020-11-22 12:56:33,699 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 [2020-11-22 12:56:33,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-22 12:56:33,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-11-22 12:56:33,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-22 12:56:33,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 113 transitions. [2020-11-22 12:56:33,709 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 113 transitions. Word has length 17 [2020-11-22 12:56:33,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:56:33,709 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 113 transitions. [2020-11-22 12:56:33,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:56:33,709 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 113 transitions. [2020-11-22 12:56:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-22 12:56:33,710 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:56:33,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:56:33,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 12:56:33,711 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:56:33,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:56:33,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1128654861, now seen corresponding path program 2 times [2020-11-22 12:56:33,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:56:33,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886306174] [2020-11-22 12:56:33,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:56:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:56:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:56:33,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886306174] [2020-11-22 12:56:33,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:56:33,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:56:33,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687044233] [2020-11-22 12:56:33,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:56:33,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:56:33,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:56:33,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:56:33,837 INFO L87 Difference]: Start difference. First operand 61 states and 113 transitions. Second operand 5 states. [2020-11-22 12:56:33,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:56:33,888 INFO L93 Difference]: Finished difference Result 81 states and 148 transitions. [2020-11-22 12:56:33,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:56:33,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-11-22 12:56:33,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:56:33,890 INFO L225 Difference]: With dead ends: 81 [2020-11-22 12:56:33,890 INFO L226 Difference]: Without dead ends: 55 [2020-11-22 12:56:33,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-22 12:56:33,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-22 12:56:33,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-11-22 12:56:33,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-22 12:56:33,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 101 transitions. [2020-11-22 12:56:33,895 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 101 transitions. Word has length 17 [2020-11-22 12:56:33,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:56:33,895 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 101 transitions. [2020-11-22 12:56:33,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:56:33,895 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 101 transitions. [2020-11-22 12:56:33,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-22 12:56:33,896 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:56:33,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:56:33,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 12:56:33,910 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:56:33,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:56:33,911 INFO L82 PathProgramCache]: Analyzing trace with hash -842301437, now seen corresponding path program 3 times [2020-11-22 12:56:33,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:56:33,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120876081] [2020-11-22 12:56:33,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:56:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:56:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:56:34,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120876081] [2020-11-22 12:56:34,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:56:34,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 12:56:34,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015478394] [2020-11-22 12:56:34,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:56:34,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:56:34,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:56:34,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:56:34,011 INFO L87 Difference]: Start difference. First operand 55 states and 101 transitions. Second operand 5 states. [2020-11-22 12:56:34,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:56:34,044 INFO L93 Difference]: Finished difference Result 54 states and 100 transitions. [2020-11-22 12:56:34,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:56:34,045 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-11-22 12:56:34,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:56:34,045 INFO L225 Difference]: With dead ends: 54 [2020-11-22 12:56:34,045 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:56:34,046 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 [2020-11-22 12:56:34,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:56:34,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:56:34,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:56:34,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:56:34,047 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-11-22 12:56:34,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:56:34,047 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:56:34,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:56:34,047 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:56:34,048 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:56:34,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 12:56:34,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:56:34 BasicIcfg [2020-11-22 12:56:34,052 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:56:34,052 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:56:34,052 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:56:34,052 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:56:34,053 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:56:29" (3/4) ... [2020-11-22 12:56:34,057 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:56:34,064 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2020-11-22 12:56:34,064 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2020-11-22 12:56:34,064 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2020-11-22 12:56:34,070 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-11-22 12:56:34,070 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-22 12:56:34,070 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:56:34,071 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:56:34,139 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_32674d1e-8dec-4715-87b6-e423169159cd/bin/utaipan/witness.graphml [2020-11-22 12:56:34,140 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:56:34,144 INFO L168 Benchmark]: Toolchain (without parser) took 6015.19 ms. Allocated memory was 102.8 MB in the beginning and 125.8 MB in the end (delta: 23.1 MB). Free memory was 66.7 MB in the beginning and 85.6 MB in the end (delta: -18.9 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:56:34,146 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 102.8 MB. Free memory was 76.0 MB in the beginning and 76.0 MB in the end (delta: 26.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:56:34,148 INFO L168 Benchmark]: CACSL2BoogieTranslator took 668.30 ms. Allocated memory is still 102.8 MB. Free memory was 66.4 MB in the beginning and 57.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-22 12:56:34,149 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.05 ms. Allocated memory is still 102.8 MB. Free memory was 57.0 MB in the beginning and 55.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:56:34,149 INFO L168 Benchmark]: Boogie Preprocessor took 57.40 ms. Allocated memory is still 102.8 MB. Free memory was 55.4 MB in the beginning and 53.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:56:34,150 INFO L168 Benchmark]: RCFGBuilder took 702.03 ms. Allocated memory was 102.8 MB in the beginning and 125.8 MB in the end (delta: 23.1 MB). Free memory was 53.9 MB in the beginning and 90.0 MB in the end (delta: -36.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. [2020-11-22 12:56:34,151 INFO L168 Benchmark]: TraceAbstraction took 4416.94 ms. Allocated memory is still 125.8 MB. Free memory was 90.0 MB in the beginning and 87.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.1 GB. [2020-11-22 12:56:34,152 INFO L168 Benchmark]: Witness Printer took 87.87 ms. Allocated memory is still 125.8 MB. Free memory was 87.7 MB in the beginning and 85.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:56:34,155 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 102.8 MB. Free memory was 76.0 MB in the beginning and 76.0 MB in the end (delta: 26.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 668.30 ms. Allocated memory is still 102.8 MB. Free memory was 66.4 MB in the beginning and 57.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.05 ms. Allocated memory is still 102.8 MB. Free memory was 57.0 MB in the beginning and 55.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.40 ms. Allocated memory is still 102.8 MB. Free memory was 55.4 MB in the beginning and 53.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 702.03 ms. Allocated memory was 102.8 MB in the beginning and 125.8 MB in the end (delta: 23.1 MB). Free memory was 53.9 MB in the beginning and 90.0 MB in the end (delta: -36.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4416.94 ms. Allocated memory is still 125.8 MB. Free memory was 90.0 MB in the beginning and 87.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.1 GB. * Witness Printer took 87.87 ms. Allocated memory is still 125.8 MB. Free memory was 87.7 MB in the beginning and 85.6 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, 35 VarBasedMoverChecksNegative, 7 SemBasedMoverChecksPositive, 28 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.3s, 59 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.7s, 84 PlacesBefore, 31 PlacesAfterwards, 77 TransitionsBefore, 22 TransitionsAfterwards, 1348 CoEnabledTransitionPairs, 6 FixpointIterations, 17 TrivialSequentialCompositions, 37 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 16 ConcurrentYvCompositions, 2 ChoiceCompositions, 72 TotalNumberOfCompositions, 2469 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, 75 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.2s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: 120 SDtfs, 82 SDslu, 160 SDs, 0 SdLazy, 59 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=274occurred 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 93 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 86 ConstructedInterpolants, 0 QuantifiedInterpolants, 2940 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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...