./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P --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 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:58:55,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:58:55,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:58:55,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:58:55,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:58:55,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:58:55,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:58:55,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:58:55,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:58:55,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:58:55,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:58:55,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:58:55,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:58:55,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:58:55,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:58:55,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:58:55,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:58:55,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:58:55,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:58:55,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:58:55,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:58:55,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:58:55,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:58:55,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:58:55,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:58:55,943 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:58:55,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:58:55,944 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:58:55,945 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:58:55,946 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:58:55,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:58:55,947 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:58:55,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:58:55,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:58:55,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:58:55,950 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:58:55,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:58:55,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:58:55,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:58:55,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:58:55,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:58:55,959 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:58:56,004 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:58:56,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:58:56,004 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:58:56,005 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:58:56,005 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:58:56,009 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:58:56,009 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:58:56,009 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:58:56,009 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:58:56,010 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:58:56,011 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:58:56,011 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:58:56,011 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:58:56,011 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:58:56,011 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:58:56,012 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:58:56,012 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:58:56,012 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:58:56,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:58:56,014 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:58:56,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:58:56,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:58:56,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:58:56,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:58:56,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:58:56,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:58:56,016 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:58:56,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:58:56,017 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:58:56,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:58:56,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:58:56,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:58:56,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:58:56,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:58:56,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:58:56,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:58:56,019 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:58:56,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:58:56,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:58:56,019 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:58:56,019 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:58:56,020 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_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 [2021-11-21 00:58:56,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:58:56,298 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:58:56,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:58:56,301 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:58:56,301 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:58:56,302 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2021-11-21 00:58:56,371 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/data/3141d7d67/11558ee18d4e455dbc99aa9290ddcfe3/FLAG298541b97 [2021-11-21 00:58:56,858 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:58:56,859 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2021-11-21 00:58:56,865 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/data/3141d7d67/11558ee18d4e455dbc99aa9290ddcfe3/FLAG298541b97 [2021-11-21 00:58:57,266 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/data/3141d7d67/11558ee18d4e455dbc99aa9290ddcfe3 [2021-11-21 00:58:57,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:58:57,270 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:58:57,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:58:57,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:58:57,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:58:57,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:58:57" (1/1) ... [2021-11-21 00:58:57,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39ad5088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:57, skipping insertion in model container [2021-11-21 00:58:57,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:58:57" (1/1) ... [2021-11-21 00:58:57,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:58:57,315 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:58:57,516 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_98ef1331-7536-485f-b757-5a6e3f6eaafe/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2021-11-21 00:58:57,523 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:58:57,530 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:58:57,550 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_98ef1331-7536-485f-b757-5a6e3f6eaafe/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2021-11-21 00:58:57,554 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:58:57,568 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:58:57,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:57 WrapperNode [2021-11-21 00:58:57,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:58:57,569 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:58:57,570 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:58:57,570 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:58:57,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:57" (1/1) ... [2021-11-21 00:58:57,603 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:57" (1/1) ... [2021-11-21 00:58:57,626 INFO L137 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 128 [2021-11-21 00:58:57,627 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:58:57,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:58:57,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:58:57,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:58:57,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:57" (1/1) ... [2021-11-21 00:58:57,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:57" (1/1) ... [2021-11-21 00:58:57,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:57" (1/1) ... [2021-11-21 00:58:57,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:57" (1/1) ... [2021-11-21 00:58:57,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:57" (1/1) ... [2021-11-21 00:58:57,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:57" (1/1) ... [2021-11-21 00:58:57,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:57" (1/1) ... [2021-11-21 00:58:57,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:58:57,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:58:57,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:58:57,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:58:57,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:57" (1/1) ... [2021-11-21 00:58:57,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:58:57,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:58:57,712 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:58:57,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:58:57,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:58:57,769 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-21 00:58:57,770 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-21 00:58:57,770 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-21 00:58:57,770 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-21 00:58:57,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:58:57,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:58:57,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:58:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-21 00:58:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-21 00:58:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:58:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:58:57,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:58:57,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:58:57,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:58:57,773 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-21 00:58:57,888 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:58:57,890 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:58:58,126 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:58:58,222 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:58:58,222 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 00:58:58,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:58:58 BoogieIcfgContainer [2021-11-21 00:58:58,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:58:58,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:58:58,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:58:58,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:58:58,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:58:57" (1/3) ... [2021-11-21 00:58:58,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@853fd79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:58:58, skipping insertion in model container [2021-11-21 00:58:58,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:58:57" (2/3) ... [2021-11-21 00:58:58,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@853fd79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:58:58, skipping insertion in model container [2021-11-21 00:58:58,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:58:58" (3/3) ... [2021-11-21 00:58:58,245 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2021-11-21 00:58:58,250 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-21 00:58:58,258 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:58:58,259 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:58:58,259 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-21 00:58:58,311 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,311 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,311 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,312 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,312 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,312 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,312 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,312 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,312 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,313 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,313 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,313 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,313 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,313 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,314 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,314 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,314 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,314 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,314 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,315 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,315 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,315 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,316 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,316 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,316 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,316 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,316 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,316 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,317 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,317 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,317 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,317 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,317 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,318 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,318 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,318 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,318 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,318 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,319 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,319 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,322 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,322 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,322 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,322 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,322 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,323 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,323 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,324 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,324 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,324 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,324 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,325 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,325 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,325 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-21 00:58:58,348 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-21 00:58:58,393 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:58:58,400 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:58:58,401 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-21 00:58:58,416 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-21 00:58:58,430 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 120 transitions, 256 flow [2021-11-21 00:58:58,433 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 120 transitions, 256 flow [2021-11-21 00:58:58,435 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 256 flow [2021-11-21 00:58:58,504 INFO L129 PetriNetUnfolder]: 9/118 cut-off events. [2021-11-21 00:58:58,523 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-21 00:58:58,526 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 9/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2021-11-21 00:58:58,532 INFO L116 LiptonReduction]: Number of co-enabled transitions 368 [2021-11-21 00:59:02,915 INFO L131 LiptonReduction]: Checked pairs total: 469 [2021-11-21 00:59:02,915 INFO L133 LiptonReduction]: Total number of compositions: 121 [2021-11-21 00:59:02,932 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 22 places, 18 transitions, 52 flow [2021-11-21 00:59:02,941 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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) [2021-11-21 00:59:02,945 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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) [2021-11-21 00:59:02,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 00:59:02,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:02,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:59:02,958 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-21 00:59:02,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:02,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1984520886, now seen corresponding path program 1 times [2021-11-21 00:59:02,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:02,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731498414] [2021-11-21 00:59:02,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:02,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:59:03,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:59:03,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731498414] [2021-11-21 00:59:03,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731498414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:59:03,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:59:03,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-21 00:59:03,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340691531] [2021-11-21 00:59:03,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:59:03,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:59:03,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:59:03,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:59:03,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:59:03,260 INFO L87 Difference]: Start difference. First operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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 6.0) internal successors, (12), 2 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) [2021-11-21 00:59:03,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:59:03,306 INFO L93 Difference]: Finished difference Result 34 states and 71 transitions. [2021-11-21 00:59:03,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:59:03,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 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 [2021-11-21 00:59:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:59:03,320 INFO L225 Difference]: With dead ends: 34 [2021-11-21 00:59:03,320 INFO L226 Difference]: Without dead ends: 27 [2021-11-21 00:59:03,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:59:03,327 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:59:03,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:59:03,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-21 00:59:03,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-21 00:59:03,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 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) [2021-11-21 00:59:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 56 transitions. [2021-11-21 00:59:03,366 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 56 transitions. Word has length 12 [2021-11-21 00:59:03,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:59:03,366 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 56 transitions. [2021-11-21 00:59:03,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 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) [2021-11-21 00:59:03,367 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 56 transitions. [2021-11-21 00:59:03,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 00:59:03,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:03,368 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:59:03,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:59:03,369 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-21 00:59:03,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:03,371 INFO L85 PathProgramCache]: Analyzing trace with hash -690203811, now seen corresponding path program 1 times [2021-11-21 00:59:03,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:03,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680623492] [2021-11-21 00:59:03,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:03,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:59:03,558 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:59:03,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680623492] [2021-11-21 00:59:03,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680623492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:59:03,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:59:03,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:59:03,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917426597] [2021-11-21 00:59:03,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:59:03,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:59:03,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:59:03,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:59:03,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:59:03,564 INFO L87 Difference]: Start difference. First operand 27 states and 56 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-11-21 00:59:03,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:59:03,606 INFO L93 Difference]: Finished difference Result 37 states and 72 transitions. [2021-11-21 00:59:03,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:59:03,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 13 [2021-11-21 00:59:03,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:59:03,608 INFO L225 Difference]: With dead ends: 37 [2021-11-21 00:59:03,608 INFO L226 Difference]: Without dead ends: 31 [2021-11-21 00:59:03,608 INFO L932 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 [2021-11-21 00:59:03,610 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:59:03,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:59:03,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-21 00:59:03,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-21 00:59:03,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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) [2021-11-21 00:59:03,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 63 transitions. [2021-11-21 00:59:03,616 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 63 transitions. Word has length 13 [2021-11-21 00:59:03,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:59:03,617 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 63 transitions. [2021-11-21 00:59:03,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-11-21 00:59:03,617 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 63 transitions. [2021-11-21 00:59:03,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 00:59:03,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:03,618 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:59:03,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:59:03,619 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-21 00:59:03,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:03,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1443946924, now seen corresponding path program 1 times [2021-11-21 00:59:03,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:03,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042035095] [2021-11-21 00:59:03,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:03,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:59:03,671 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:59:03,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042035095] [2021-11-21 00:59:03,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042035095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:59:03,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:59:03,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:59:03,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396257680] [2021-11-21 00:59:03,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:59:03,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:59:03,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:59:03,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:59:03,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:59:03,674 INFO L87 Difference]: Start difference. First operand 31 states and 63 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-11-21 00:59:03,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:59:03,723 INFO L93 Difference]: Finished difference Result 37 states and 69 transitions. [2021-11-21 00:59:03,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:59:03,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2021-11-21 00:59:03,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:59:03,727 INFO L225 Difference]: With dead ends: 37 [2021-11-21 00:59:03,727 INFO L226 Difference]: Without dead ends: 32 [2021-11-21 00:59:03,728 INFO L932 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 [2021-11-21 00:59:03,732 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 8 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:59:03,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 0 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:59:03,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-21 00:59:03,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-21 00:59:03,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 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) [2021-11-21 00:59:03,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 64 transitions. [2021-11-21 00:59:03,749 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 64 transitions. Word has length 14 [2021-11-21 00:59:03,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:59:03,750 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 64 transitions. [2021-11-21 00:59:03,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-11-21 00:59:03,754 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 64 transitions. [2021-11-21 00:59:03,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 00:59:03,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:03,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:59:03,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:59:03,756 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-21 00:59:03,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:03,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2014941100, now seen corresponding path program 1 times [2021-11-21 00:59:03,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:03,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123720769] [2021-11-21 00:59:03,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:03,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:59:04,189 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:59:04,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123720769] [2021-11-21 00:59:04,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123720769] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:59:04,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408718818] [2021-11-21 00:59:04,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:04,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:04,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:59:04,192 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:59:04,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:59:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:04,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-21 00:59:04,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:59:04,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-21 00:59:04,654 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-21 00:59:04,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-11-21 00:59:04,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:59:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:59:04,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:59:05,378 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~pre12#1_36| Int) (|ULTIMATE.start_main_~#t2~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base|) |ULTIMATE.start_main_~#t2~0#1.offset| |v_ULTIMATE.start_main_#t~pre12#1_36|)) c_~queue~0.base) (+ (* c_~front~0 4) c_~queue~0.offset)) 5)) is different from false [2021-11-21 00:59:05,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:59:05,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2021-11-21 00:59:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-21 00:59:05,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408718818] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:59:05,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [965779728] [2021-11-21 00:59:05,603 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-21 00:59:05,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:59:05,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2021-11-21 00:59:05,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618943830] [2021-11-21 00:59:05,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:59:05,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 00:59:05,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:59:05,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 00:59:05,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=165, Unknown=1, NotChecked=26, Total=240 [2021-11-21 00:59:05,609 INFO L87 Difference]: Start difference. First operand 32 states and 64 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 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) [2021-11-21 00:59:12,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:59:12,093 INFO L93 Difference]: Finished difference Result 145 states and 332 transitions. [2021-11-21 00:59:12,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 00:59:12,094 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 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 15 [2021-11-21 00:59:12,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:59:12,096 INFO L225 Difference]: With dead ends: 145 [2021-11-21 00:59:12,096 INFO L226 Difference]: Without dead ends: 140 [2021-11-21 00:59:12,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=214, Invalid=719, Unknown=1, NotChecked=58, Total=992 [2021-11-21 00:59:12,098 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:59:12,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 215 Invalid, 0 Unknown, 78 Unchecked, 0.2s Time] [2021-11-21 00:59:12,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-21 00:59:12,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 67. [2021-11-21 00:59:12,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.3484848484848486) internal successors, (155), 66 states have internal predecessors, (155), 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) [2021-11-21 00:59:12,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 155 transitions. [2021-11-21 00:59:12,110 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 155 transitions. Word has length 15 [2021-11-21 00:59:12,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:59:12,111 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 155 transitions. [2021-11-21 00:59:12,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 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) [2021-11-21 00:59:12,111 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 155 transitions. [2021-11-21 00:59:12,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 00:59:12,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:12,112 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:59:12,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:59:12,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:12,338 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-21 00:59:12,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:12,339 INFO L85 PathProgramCache]: Analyzing trace with hash 500204008, now seen corresponding path program 2 times [2021-11-21 00:59:12,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:12,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743690629] [2021-11-21 00:59:12,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:12,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:59:12,637 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:59:12,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743690629] [2021-11-21 00:59:12,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743690629] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:59:12,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407696437] [2021-11-21 00:59:12,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:59:12,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:12,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:59:12,646 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:59:12,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98ef1331-7536-485f-b757-5a6e3f6eaafe/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:59:12,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:59:12,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:59:12,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-21 00:59:12,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:59:12,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-21 00:59:12,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-21 00:59:12,954 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-21 00:59:12,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-21 00:59:13,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-21 00:59:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:59:13,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:59:13,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:59:13,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2124 treesize of output 2060