./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/rfi006_power.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ccacb6-9a31-4c34-abea-54c5935fe8d1/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ccacb6-9a31-4c34-abea-54c5935fe8d1/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ccacb6-9a31-4c34-abea-54c5935fe8d1/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ccacb6-9a31-4c34-abea-54c5935fe8d1/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/rfi006_power.opt.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ccacb6-9a31-4c34-abea-54c5935fe8d1/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ccacb6-9a31-4c34-abea-54c5935fe8d1/bin/utaipan-G1rejxKTta --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 de3096cf2a7a81c5a5563cf2e9ae3ddf8f4cc1ab1b483fb6503759d4e39a0a81 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:22:21,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:22:21,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:22:21,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:22:21,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:22:21,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:22:21,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:22:21,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:22:21,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:22:21,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:22:21,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:22:21,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:22:21,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:22:21,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:22:21,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:22:21,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:22:21,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:22:21,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:22:21,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:22:21,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:22:21,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:22:21,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:22:21,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:22:21,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:22:21,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:22:21,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:22:21,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:22:21,712 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:22:21,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:22:21,713 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:22:21,714 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:22:21,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:22:21,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:22:21,719 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:22:21,720 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:22:21,721 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:22:21,721 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:22:21,722 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:22:21,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:22:21,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:22:21,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:22:21,725 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ccacb6-9a31-4c34-abea-54c5935fe8d1/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:22:21,768 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:22:21,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:22:21,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:22:21,769 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:22:21,770 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:22:21,770 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:22:21,771 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:22:21,771 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:22:21,771 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:22:21,771 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:22:21,772 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:22:21,773 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:22:21,773 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:22:21,773 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:22:21,774 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:22:21,774 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:22:21,774 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:22:21,774 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:22:21,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:22:21,775 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:22:21,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:22:21,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:22:21,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:22:21,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:22:21,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:22:21,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:22:21,777 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:22:21,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:22:21,778 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:22:21,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:22:21,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:22:21,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:22:21,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:22:21,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:22:21,780 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:22:21,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:22:21,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:22:21,780 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:22:21,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:22:21,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:22:21,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:22:21,781 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_worker_vcloud-master_on_vcloud-master/run_dir_e3ccacb6-9a31-4c34-abea-54c5935fe8d1/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ccacb6-9a31-4c34-abea-54c5935fe8d1/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de3096cf2a7a81c5a5563cf2e9ae3ddf8f4cc1ab1b483fb6503759d4e39a0a81 [2022-10-17 17:22:22,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:22:22,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:22:22,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:22:22,104 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:22:22,104 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:22:22,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ccacb6-9a31-4c34-abea-54c5935fe8d1/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/pthread-wmm/rfi006_power.opt.i [2022-10-17 17:22:22,169 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ccacb6-9a31-4c34-abea-54c5935fe8d1/bin/utaipan-G1rejxKTta/data/306735a54/df8a5211e68640b59d359c3701def041/FLAG2cdbf51ea [2022-10-17 17:22:22,710 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:22:22,710 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ccacb6-9a31-4c34-abea-54c5935fe8d1/sv-benchmarks/c/pthread-wmm/rfi006_power.opt.i [2022-10-17 17:22:22,726 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ccacb6-9a31-4c34-abea-54c5935fe8d1/bin/utaipan-G1rejxKTta/data/306735a54/df8a5211e68640b59d359c3701def041/FLAG2cdbf51ea [2022-10-17 17:22:23,010 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ccacb6-9a31-4c34-abea-54c5935fe8d1/bin/utaipan-G1rejxKTta/data/306735a54/df8a5211e68640b59d359c3701def041 [2022-10-17 17:22:23,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:22:23,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:22:23,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:22:23,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:22:23,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:22:23,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:22:23" (1/1) ... [2022-10-17 17:22:23,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ca217fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:23, skipping insertion in model container [2022-10-17 17:22:23,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:22:23" (1/1) ... [2022-10-17 17:22:23,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:22:23,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:22:23,301 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ccacb6-9a31-4c34-abea-54c5935fe8d1/sv-benchmarks/c/pthread-wmm/rfi006_power.opt.i[993,1006] [2022-10-17 17:22:23,600 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:22:23,613 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:22:23,632 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ccacb6-9a31-4c34-abea-54c5935fe8d1/sv-benchmarks/c/pthread-wmm/rfi006_power.opt.i[993,1006] [2022-10-17 17:22:23,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:22:23,786 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:22:23,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:23 WrapperNode [2022-10-17 17:22:23,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:22:23,788 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:22:23,788 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:22:23,789 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:22:23,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:23" (1/1) ... [2022-10-17 17:22:23,838 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:23" (1/1) ... [2022-10-17 17:22:23,893 INFO L138 Inliner]: procedures = 176, calls = 75, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 209 [2022-10-17 17:22:23,894 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:22:23,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:22:23,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:22:23,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:22:23,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:23" (1/1) ... [2022-10-17 17:22:23,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:23" (1/1) ... [2022-10-17 17:22:23,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:23" (1/1) ... [2022-10-17 17:22:23,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:23" (1/1) ... [2022-10-17 17:22:23,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:23" (1/1) ... [2022-10-17 17:22:23,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:23" (1/1) ... [2022-10-17 17:22:23,979 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:23" (1/1) ... [2022-10-17 17:22:23,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:23" (1/1) ... [2022-10-17 17:22:23,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:22:23,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:22:23,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:22:23,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:22:23,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:23" (1/1) ... [2022-10-17 17:22:23,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:22:24,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ccacb6-9a31-4c34-abea-54c5935fe8d1/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:24,025 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ccacb6-9a31-4c34-abea-54c5935fe8d1/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:22:24,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3ccacb6-9a31-4c34-abea-54c5935fe8d1/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:22:24,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:22:24,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:22:24,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-10-17 17:22:24,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:22:24,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:22:24,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:22:24,073 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2022-10-17 17:22:24,073 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2022-10-17 17:22:24,074 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2022-10-17 17:22:24,074 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2022-10-17 17:22:24,074 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2022-10-17 17:22:24,074 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2022-10-17 17:22:24,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:22:24,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-10-17 17:22:24,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:22:24,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:22:24,077 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 17:22:24,239 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:22:24,241 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:22:25,363 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:22:26,327 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:22:26,327 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 17:22:26,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:22:26 BoogieIcfgContainer [2022-10-17 17:22:26,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:22:26,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:22:26,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:22:26,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:22:26,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:22:23" (1/3) ... [2022-10-17 17:22:26,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514a9bf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:22:26, skipping insertion in model container [2022-10-17 17:22:26,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:23" (2/3) ... [2022-10-17 17:22:26,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514a9bf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:22:26, skipping insertion in model container [2022-10-17 17:22:26,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:22:26" (3/3) ... [2022-10-17 17:22:26,344 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi006_power.opt.i [2022-10-17 17:22:26,355 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 17:22:26,367 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:22:26,367 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-10-17 17:22:26,368 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 17:22:26,481 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 17:22:26,543 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-10-17 17:22:26,562 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 132 transitions, 279 flow [2022-10-17 17:22:26,567 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 132 transitions, 279 flow [2022-10-17 17:22:26,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 132 transitions, 279 flow [2022-10-17 17:22:26,659 INFO L130 PetriNetUnfolder]: 2/129 cut-off events. [2022-10-17 17:22:26,660 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 17:22:26,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 129 events. 2/129 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 71. Up to 2 conditions per place. [2022-10-17 17:22:26,667 INFO L118 LiptonReduction]: Number of co-enabled transitions 1852 [2022-10-17 17:22:37,055 WARN L233 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 566 DAG size of output: 532 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-10-17 17:22:52,043 INFO L133 LiptonReduction]: Checked pairs total: 4065 [2022-10-17 17:22:52,043 INFO L135 LiptonReduction]: Total number of compositions: 119 [2022-10-17 17:22:52,051 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 24 transitions, 63 flow [2022-10-17 17:22:52,113 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 490 states, 487 states have (on average 3.0390143737166326) internal successors, (1480), 489 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:52,130 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:22:52,134 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3ae3690c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:22:52,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-10-17 17:22:52,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 490 states, 487 states have (on average 3.0390143737166326) internal successors, (1480), 489 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:52,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 17:22:52,146 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:52,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:52,147 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-10-17 17:22:52,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:52,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1358024322, now seen corresponding path program 1 times [2022-10-17 17:22:52,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:52,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255809767] [2022-10-17 17:22:52,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:52,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:52,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:52,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255809767] [2022-10-17 17:22:52,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255809767] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:52,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:52,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-17 17:22:52,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818194245] [2022-10-17 17:22:52,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:52,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:22:52,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:52,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:22:52,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:22:52,738 INFO L87 Difference]: Start difference. First operand has 490 states, 487 states have (on average 3.0390143737166326) internal successors, (1480), 489 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:52,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:52,891 INFO L93 Difference]: Finished difference Result 390 states and 1145 transitions. [2022-10-17 17:22:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:22:52,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-17 17:22:52,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:52,910 INFO L225 Difference]: With dead ends: 390 [2022-10-17 17:22:52,911 INFO L226 Difference]: Without dead ends: 370 [2022-10-17 17:22:52,912 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:22:52,915 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:52,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 4 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:22:52,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-10-17 17:22:52,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2022-10-17 17:22:52,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.964769647696477) internal successors, (1094), 369 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:52,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1094 transitions. [2022-10-17 17:22:52,993 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1094 transitions. Word has length 7 [2022-10-17 17:22:52,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:52,994 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 1094 transitions. [2022-10-17 17:22:52,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:52,994 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1094 transitions. [2022-10-17 17:22:52,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 17:22:52,996 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:52,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:52,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:22:53,003 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-10-17 17:22:53,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:53,004 INFO L85 PathProgramCache]: Analyzing trace with hash 608788344, now seen corresponding path program 1 times [2022-10-17 17:22:53,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:53,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729249191] [2022-10-17 17:22:53,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:53,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:53,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:53,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729249191] [2022-10-17 17:22:53,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729249191] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:53,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:53,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-17 17:22:53,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903382330] [2022-10-17 17:22:53,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:53,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:22:53,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:53,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:22:53,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:22:53,403 INFO L87 Difference]: Start difference. First operand 370 states and 1094 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:53,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:53,488 INFO L93 Difference]: Finished difference Result 338 states and 982 transitions. [2022-10-17 17:22:53,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:22:53,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-17 17:22:53,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:53,493 INFO L225 Difference]: With dead ends: 338 [2022-10-17 17:22:53,493 INFO L226 Difference]: Without dead ends: 338 [2022-10-17 17:22:53,494 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:22:53,496 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:53,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 3 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:22:53,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-10-17 17:22:53,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 338. [2022-10-17 17:22:53,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.913946587537092) internal successors, (982), 337 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 982 transitions. [2022-10-17 17:22:53,525 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 982 transitions. Word has length 9 [2022-10-17 17:22:53,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:53,525 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 982 transitions. [2022-10-17 17:22:53,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:53,526 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 982 transitions. [2022-10-17 17:22:53,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:22:53,528 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:53,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:53,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:22:53,529 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-10-17 17:22:53,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:53,529 INFO L85 PathProgramCache]: Analyzing trace with hash 2131637497, now seen corresponding path program 1 times [2022-10-17 17:22:53,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:53,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763682679] [2022-10-17 17:22:53,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:53,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:53,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:53,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763682679] [2022-10-17 17:22:53,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763682679] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:53,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:53,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-17 17:22:53,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677555615] [2022-10-17 17:22:53,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:53,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:22:53,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:53,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:22:53,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:22:53,767 INFO L87 Difference]: Start difference. First operand 338 states and 982 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:53,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:53,847 INFO L93 Difference]: Finished difference Result 326 states and 941 transitions. [2022-10-17 17:22:53,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:22:53,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-10-17 17:22:53,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:53,852 INFO L225 Difference]: With dead ends: 326 [2022-10-17 17:22:53,852 INFO L226 Difference]: Without dead ends: 326 [2022-10-17 17:22:53,852 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:22:53,854 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:53,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 4 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:22:53,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-10-17 17:22:53,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2022-10-17 17:22:53,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.8953846153846152) internal successors, (941), 325 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:53,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 941 transitions. [2022-10-17 17:22:53,876 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 941 transitions. Word has length 11 [2022-10-17 17:22:53,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:53,876 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 941 transitions. [2022-10-17 17:22:53,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:53,877 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 941 transitions. [2022-10-17 17:22:53,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 17:22:53,879 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:53,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:53,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:22:53,880 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-10-17 17:22:53,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:53,881 INFO L85 PathProgramCache]: Analyzing trace with hash -558286397, now seen corresponding path program 1 times [2022-10-17 17:22:53,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:53,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954637569] [2022-10-17 17:22:53,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:53,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:22:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:22:56,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:22:56,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954637569] [2022-10-17 17:22:56,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954637569] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:22:56,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:22:56,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:22:56,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301991386] [2022-10-17 17:22:56,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:22:56,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:22:56,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:22:56,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:22:56,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:22:56,071 INFO L87 Difference]: Start difference. First operand 326 states and 941 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:56,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:22:56,292 INFO L93 Difference]: Finished difference Result 362 states and 1052 transitions. [2022-10-17 17:22:56,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:22:56,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-17 17:22:56,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:22:56,296 INFO L225 Difference]: With dead ends: 362 [2022-10-17 17:22:56,297 INFO L226 Difference]: Without dead ends: 362 [2022-10-17 17:22:56,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:22:56,298 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:22:56,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 10 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:22:56,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-10-17 17:22:56,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 332. [2022-10-17 17:22:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.86404833836858) internal successors, (948), 331 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:56,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 948 transitions. [2022-10-17 17:22:56,316 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 948 transitions. Word has length 12 [2022-10-17 17:22:56,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:22:56,317 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 948 transitions. [2022-10-17 17:22:56,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:22:56,317 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 948 transitions. [2022-10-17 17:22:56,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-17 17:22:56,320 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:22:56,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:22:56,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:22:56,321 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-10-17 17:22:56,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:22:56,322 INFO L85 PathProgramCache]: Analyzing trace with hash -127047983, now seen corresponding path program 1 times [2022-10-17 17:22:56,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:22:56,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113212711] [2022-10-17 17:22:56,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:22:56,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:22:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat