./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/stack_longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack_longer-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 --- 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-2329fc7 [2022-12-14 09:29:20,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:29:20,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:29:20,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:29:20,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:29:20,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:29:20,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:29:20,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:29:20,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:29:20,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:29:20,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:29:20,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:29:20,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:29:20,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:29:20,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:29:20,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:29:20,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:29:20,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:29:20,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:29:20,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:29:20,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:29:20,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:29:20,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:29:20,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:29:20,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:29:20,212 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:29:20,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:29:20,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:29:20,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:29:20,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:29:20,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:29:20,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:29:20,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:29:20,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:29:20,221 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:29:20,221 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:29:20,222 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:29:20,222 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:29:20,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:29:20,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:29:20,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:29:20,225 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 09:29:20,246 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:29:20,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:29:20,247 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:29:20,247 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:29:20,248 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:29:20,248 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:29:20,248 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:29:20,248 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:29:20,248 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:29:20,249 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:29:20,249 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:29:20,249 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:29:20,249 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:29:20,249 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:29:20,249 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:29:20,250 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:29:20,250 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:29:20,250 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:29:20,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 09:29:20,251 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 09:29:20,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:29:20,251 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:29:20,251 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 09:29:20,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:29:20,252 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:29:20,252 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:29:20,252 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 09:29:20,252 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 09:29:20,253 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 09:29:20,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:29:20,253 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 09:29:20,253 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:29:20,253 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:29:20,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:29:20,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:29:20,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:29:20,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:29:20,254 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:29:20,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:29:20,255 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:29:20,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:29:20,255 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:29:20,255 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_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 [2022-12-14 09:29:20,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:29:20,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:29:20,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:29:20,461 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:29:20,462 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:29:20,463 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/pthread/stack_longer-1.i [2022-12-14 09:29:23,016 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:29:23,224 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:29:23,224 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/sv-benchmarks/c/pthread/stack_longer-1.i [2022-12-14 09:29:23,237 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/data/70dee8288/b0656af481ef47fba798e60ae4774dc0/FLAG2b8628afc [2022-12-14 09:29:23,249 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/data/70dee8288/b0656af481ef47fba798e60ae4774dc0 [2022-12-14 09:29:23,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:29:23,252 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:29:23,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:29:23,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:29:23,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:29:23,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:29:23" (1/1) ... [2022-12-14 09:29:23,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a882fcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:23, skipping insertion in model container [2022-12-14 09:29:23,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:29:23" (1/1) ... [2022-12-14 09:29:23,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:29:23,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:29:23,664 WARN L237 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_21e7e49f-bfb4-409b-99d3-937a280e7656/sv-benchmarks/c/pthread/stack_longer-1.i[41527,41540] [2022-12-14 09:29:23,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:29:23,701 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:29:23,733 WARN L237 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_21e7e49f-bfb4-409b-99d3-937a280e7656/sv-benchmarks/c/pthread/stack_longer-1.i[41527,41540] [2022-12-14 09:29:23,743 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:29:23,783 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:29:23,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:23 WrapperNode [2022-12-14 09:29:23,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:29:23,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:29:23,785 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:29:23,785 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:29:23,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:23" (1/1) ... [2022-12-14 09:29:23,807 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:23" (1/1) ... [2022-12-14 09:29:23,831 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 155 [2022-12-14 09:29:23,832 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:29:23,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:29:23,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:29:23,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:29:23,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:23" (1/1) ... [2022-12-14 09:29:23,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:23" (1/1) ... [2022-12-14 09:29:23,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:23" (1/1) ... [2022-12-14 09:29:23,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:23" (1/1) ... [2022-12-14 09:29:23,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:23" (1/1) ... [2022-12-14 09:29:23,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:23" (1/1) ... [2022-12-14 09:29:23,857 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:23" (1/1) ... [2022-12-14 09:29:23,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:23" (1/1) ... [2022-12-14 09:29:23,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:29:23,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:29:23,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:29:23,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:29:23,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:23" (1/1) ... [2022-12-14 09:29:23,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:29:23,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:29:23,892 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:29:23,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:29:23,926 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-14 09:29:23,927 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-14 09:29:23,927 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-14 09:29:23,927 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-14 09:29:23,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 09:29:23,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:29:23,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 09:29:23,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 09:29:23,928 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-14 09:29:23,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:29:23,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:29:23,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:29:23,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:29:23,929 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 09:29:24,039 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:29:24,041 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:29:24,273 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:29:24,282 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:29:24,282 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 09:29:24,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:29:24 BoogieIcfgContainer [2022-12-14 09:29:24,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:29:24,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:29:24,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:29:24,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:29:24,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:29:23" (1/3) ... [2022-12-14 09:29:24,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123e1c3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:29:24, skipping insertion in model container [2022-12-14 09:29:24,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:23" (2/3) ... [2022-12-14 09:29:24,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123e1c3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:29:24, skipping insertion in model container [2022-12-14 09:29:24,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:29:24" (3/3) ... [2022-12-14 09:29:24,290 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2022-12-14 09:29:24,303 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:29:24,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-12-14 09:29:24,303 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 09:29:24,365 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-14 09:29:24,388 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 09:29:24,398 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 195 transitions, 406 flow [2022-12-14 09:29:24,400 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 195 transitions, 406 flow [2022-12-14 09:29:24,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 195 transitions, 406 flow [2022-12-14 09:29:24,450 INFO L130 PetriNetUnfolder]: 10/193 cut-off events. [2022-12-14 09:29:24,450 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 09:29:24,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 193 events. 10/193 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 506 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 143. Up to 3 conditions per place. [2022-12-14 09:29:24,459 INFO L119 LiptonReduction]: Number of co-enabled transitions 11140 [2022-12-14 09:29:28,492 INFO L134 LiptonReduction]: Checked pairs total: 15673 [2022-12-14 09:29:28,492 INFO L136 LiptonReduction]: Total number of compositions: 205 [2022-12-14 09:29:28,498 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 50 transitions, 116 flow [2022-12-14 09:29:28,536 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 786 states, 720 states have (on average 3.1902777777777778) internal successors, (2297), 785 states have internal predecessors, (2297), 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) [2022-12-14 09:29:28,548 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:29:28,553 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@39951b10, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:29:28,553 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-12-14 09:29:28,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 786 states, 720 states have (on average 3.1902777777777778) internal successors, (2297), 785 states have internal predecessors, (2297), 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) [2022-12-14 09:29:28,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-12-14 09:29:28,559 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:28,559 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-12-14 09:29:28,560 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:28,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:28,563 INFO L85 PathProgramCache]: Analyzing trace with hash 807, now seen corresponding path program 1 times [2022-12-14 09:29:28,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:29:28,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549828819] [2022-12-14 09:29:28,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:28,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:29:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:28,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:29:28,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549828819] [2022-12-14 09:29:28,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549828819] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:28,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:28,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-14 09:29:28,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747261985] [2022-12-14 09:29:28,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:28,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 09:29:28,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:29:28,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 09:29:28,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 09:29:28,673 INFO L87 Difference]: Start difference. First operand has 786 states, 720 states have (on average 3.1902777777777778) internal successors, (2297), 785 states have internal predecessors, (2297), 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 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-12-14 09:29:28,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:28,759 INFO L93 Difference]: Finished difference Result 784 states and 2239 transitions. [2022-12-14 09:29:28,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 09:29:28,761 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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 1 [2022-12-14 09:29:28,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:28,775 INFO L225 Difference]: With dead ends: 784 [2022-12-14 09:29:28,775 INFO L226 Difference]: Without dead ends: 784 [2022-12-14 09:29:28,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 09:29:28,778 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 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, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:28,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:29:28,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-12-14 09:29:28,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2022-12-14 09:29:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 720 states have (on average 3.109722222222222) internal successors, (2239), 783 states have internal predecessors, (2239), 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) [2022-12-14 09:29:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2239 transitions. [2022-12-14 09:29:28,853 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2239 transitions. Word has length 1 [2022-12-14 09:29:28,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:28,854 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 2239 transitions. [2022-12-14 09:29:28,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-12-14 09:29:28,854 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2239 transitions. [2022-12-14 09:29:28,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 09:29:28,854 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:28,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 09:29:28,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:29:28,855 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:28,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:28,856 INFO L85 PathProgramCache]: Analyzing trace with hash 792906, now seen corresponding path program 1 times [2022-12-14 09:29:28,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:29:28,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115106916] [2022-12-14 09:29:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:28,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:29:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:29,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:29:29,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115106916] [2022-12-14 09:29:29,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115106916] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:29,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:29,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:29:29,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707253850] [2022-12-14 09:29:29,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:29,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:29:29,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:29:29,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:29:29,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:29,036 INFO L87 Difference]: Start difference. First operand 784 states and 2239 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-12-14 09:29:29,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:29,087 INFO L93 Difference]: Finished difference Result 758 states and 2184 transitions. [2022-12-14 09:29:29,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:29:29,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2022-12-14 09:29:29,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:29,092 INFO L225 Difference]: With dead ends: 758 [2022-12-14 09:29:29,093 INFO L226 Difference]: Without dead ends: 758 [2022-12-14 09:29:29,093 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 [2022-12-14 09:29:29,094 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:29,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:29:29,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-12-14 09:29:29,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 758. [2022-12-14 09:29:29,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 702 states have (on average 3.111111111111111) internal successors, (2184), 757 states have internal predecessors, (2184), 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) [2022-12-14 09:29:29,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2184 transitions. [2022-12-14 09:29:29,115 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2184 transitions. Word has length 3 [2022-12-14 09:29:29,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:29,116 INFO L495 AbstractCegarLoop]: Abstraction has 758 states and 2184 transitions. [2022-12-14 09:29:29,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-12-14 09:29:29,116 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2184 transitions. [2022-12-14 09:29:29,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 09:29:29,116 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:29,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 09:29:29,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:29:29,117 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:29,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:29,117 INFO L85 PathProgramCache]: Analyzing trace with hash 792907, now seen corresponding path program 1 times [2022-12-14 09:29:29,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:29:29,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306342399] [2022-12-14 09:29:29,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:29,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:29:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:29,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:29:29,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306342399] [2022-12-14 09:29:29,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306342399] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:29,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:29,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:29:29,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40417012] [2022-12-14 09:29:29,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:29,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:29:29,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:29:29,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:29:29,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:29,195 INFO L87 Difference]: Start difference. First operand 758 states and 2184 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-12-14 09:29:29,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:29,237 INFO L93 Difference]: Finished difference Result 732 states and 2129 transitions. [2022-12-14 09:29:29,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:29:29,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2022-12-14 09:29:29,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:29,240 INFO L225 Difference]: With dead ends: 732 [2022-12-14 09:29:29,241 INFO L226 Difference]: Without dead ends: 732 [2022-12-14 09:29:29,241 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 [2022-12-14 09:29:29,241 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:29,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:29:29,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-12-14 09:29:29,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 732. [2022-12-14 09:29:29,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 684 states have (on average 3.1125730994152048) internal successors, (2129), 731 states have internal predecessors, (2129), 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) [2022-12-14 09:29:29,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2129 transitions. [2022-12-14 09:29:29,256 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2129 transitions. Word has length 3 [2022-12-14 09:29:29,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:29,257 INFO L495 AbstractCegarLoop]: Abstraction has 732 states and 2129 transitions. [2022-12-14 09:29:29,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-12-14 09:29:29,257 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2129 transitions. [2022-12-14 09:29:29,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 09:29:29,257 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:29,257 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 09:29:29,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 09:29:29,257 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:29,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:29,258 INFO L85 PathProgramCache]: Analyzing trace with hash 762000067, now seen corresponding path program 1 times [2022-12-14 09:29:29,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:29:29,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552891621] [2022-12-14 09:29:29,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:29,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:29:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:29,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:29:29,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552891621] [2022-12-14 09:29:29,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552891621] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:29,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:29,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:29:29,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178609869] [2022-12-14 09:29:29,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:29,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:29:29,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:29:29,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:29:29,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:29:29,326 INFO L87 Difference]: Start difference. First operand 732 states and 2129 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-12-14 09:29:29,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:29,372 INFO L93 Difference]: Finished difference Result 563 states and 1583 transitions. [2022-12-14 09:29:29,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:29:29,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-12-14 09:29:29,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:29,375 INFO L225 Difference]: With dead ends: 563 [2022-12-14 09:29:29,376 INFO L226 Difference]: Without dead ends: 563 [2022-12-14 09:29:29,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:29:29,377 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:29,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 0 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:29:29,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-12-14 09:29:29,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2022-12-14 09:29:29,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 531 states have (on average 2.981167608286252) internal successors, (1583), 562 states have internal predecessors, (1583), 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) [2022-12-14 09:29:29,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1583 transitions. [2022-12-14 09:29:29,403 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1583 transitions. Word has length 5 [2022-12-14 09:29:29,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:29,404 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 1583 transitions. [2022-12-14 09:29:29,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-12-14 09:29:29,404 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1583 transitions. [2022-12-14 09:29:29,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 09:29:29,404 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:29,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 09:29:29,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 09:29:29,405 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:29,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:29,405 INFO L85 PathProgramCache]: Analyzing trace with hash 762000068, now seen corresponding path program 1 times [2022-12-14 09:29:29,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:29:29,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385562119] [2022-12-14 09:29:29,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:29,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:29:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:29,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:29:29,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385562119] [2022-12-14 09:29:29,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385562119] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:29,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:29,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:29:29,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847913036] [2022-12-14 09:29:29,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:29,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:29:29,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:29:29,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:29:29,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:29,448 INFO L87 Difference]: Start difference. First operand 563 states and 1583 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-12-14 09:29:29,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:29,492 INFO L93 Difference]: Finished difference Result 394 states and 1037 transitions. [2022-12-14 09:29:29,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:29:29,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-12-14 09:29:29,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:29,495 INFO L225 Difference]: With dead ends: 394 [2022-12-14 09:29:29,495 INFO L226 Difference]: Without dead ends: 394 [2022-12-14 09:29:29,495 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 [2022-12-14 09:29:29,496 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:29,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:29:29,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-12-14 09:29:29,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2022-12-14 09:29:29,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 378 states have (on average 2.7433862433862433) internal successors, (1037), 393 states have internal predecessors, (1037), 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) [2022-12-14 09:29:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1037 transitions. [2022-12-14 09:29:29,508 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1037 transitions. Word has length 5 [2022-12-14 09:29:29,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:29,509 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 1037 transitions. [2022-12-14 09:29:29,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-12-14 09:29:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1037 transitions. [2022-12-14 09:29:29,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:29:29,509 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:29,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:29:29,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 09:29:29,510 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:29,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:29,510 INFO L85 PathProgramCache]: Analyzing trace with hash 2146615759, now seen corresponding path program 1 times [2022-12-14 09:29:29,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:29:29,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701228194] [2022-12-14 09:29:29,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:29,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:29:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:29,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:29:29,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701228194] [2022-12-14 09:29:29,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701228194] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:29,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:29,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:29:29,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854935685] [2022-12-14 09:29:29,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:29,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:29:29,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:29:29,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:29:29,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:29:29,750 INFO L87 Difference]: Start difference. First operand 394 states and 1037 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-12-14 09:29:29,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:29,869 INFO L93 Difference]: Finished difference Result 526 states and 1365 transitions. [2022-12-14 09:29:29,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:29:29,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-12-14 09:29:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:29,875 INFO L225 Difference]: With dead ends: 526 [2022-12-14 09:29:29,875 INFO L226 Difference]: Without dead ends: 526 [2022-12-14 09:29:29,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:29:29,876 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:29,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:29:29,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-12-14 09:29:29,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 500. [2022-12-14 09:29:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 484 states have (on average 2.762396694214876) internal successors, (1337), 499 states have internal predecessors, (1337), 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) [2022-12-14 09:29:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1337 transitions. [2022-12-14 09:29:29,894 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1337 transitions. Word has length 6 [2022-12-14 09:29:29,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:29,895 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 1337 transitions. [2022-12-14 09:29:29,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-12-14 09:29:29,895 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1337 transitions. [2022-12-14 09:29:29,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:29:29,895 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:29,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:29:29,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 09:29:29,896 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:29,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:29,896 INFO L85 PathProgramCache]: Analyzing trace with hash 2146615760, now seen corresponding path program 1 times [2022-12-14 09:29:29,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:29:29,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701275795] [2022-12-14 09:29:29,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:29,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:29:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:30,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:29:30,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701275795] [2022-12-14 09:29:30,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701275795] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:30,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:30,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:29:30,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961537098] [2022-12-14 09:29:30,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:30,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:29:30,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:29:30,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:29:30,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:29:30,023 INFO L87 Difference]: Start difference. First operand 500 states and 1337 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-12-14 09:29:30,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:30,094 INFO L93 Difference]: Finished difference Result 469 states and 1233 transitions. [2022-12-14 09:29:30,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:29:30,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-12-14 09:29:30,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:30,097 INFO L225 Difference]: With dead ends: 469 [2022-12-14 09:29:30,097 INFO L226 Difference]: Without dead ends: 469 [2022-12-14 09:29:30,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:29:30,098 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:30,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:29:30,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-12-14 09:29:30,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 460. [2022-12-14 09:29:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 448 states have (on average 2.734375) internal successors, (1225), 459 states have internal predecessors, (1225), 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) [2022-12-14 09:29:30,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1225 transitions. [2022-12-14 09:29:30,111 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1225 transitions. Word has length 6 [2022-12-14 09:29:30,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:30,112 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 1225 transitions. [2022-12-14 09:29:30,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-12-14 09:29:30,112 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1225 transitions. [2022-12-14 09:29:30,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 09:29:30,113 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:30,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:29:30,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 09:29:30,113 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:30,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:30,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1842209155, now seen corresponding path program 1 times [2022-12-14 09:29:30,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:29:30,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20104485] [2022-12-14 09:29:30,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:30,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:29:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:30,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:29:30,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20104485] [2022-12-14 09:29:30,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20104485] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:30,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:30,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:29:30,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019749651] [2022-12-14 09:29:30,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:30,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:29:30,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:29:30,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:29:30,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:30,154 INFO L87 Difference]: Start difference. First operand 460 states and 1225 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-12-14 09:29:30,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:30,212 INFO L93 Difference]: Finished difference Result 470 states and 1203 transitions. [2022-12-14 09:29:30,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:29:30,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2022-12-14 09:29:30,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:30,216 INFO L225 Difference]: With dead ends: 470 [2022-12-14 09:29:30,216 INFO L226 Difference]: Without dead ends: 466 [2022-12-14 09:29:30,216 INFO L412 NwaCegarLoop]: 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 [2022-12-14 09:29:30,216 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:30,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 0 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:29:30,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-12-14 09:29:30,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 450. [2022-12-14 09:29:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 437 states have (on average 2.6864988558352403) internal successors, (1174), 449 states have internal predecessors, (1174), 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) [2022-12-14 09:29:30,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1174 transitions. [2022-12-14 09:29:30,225 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1174 transitions. Word has length 8 [2022-12-14 09:29:30,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:30,225 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 1174 transitions. [2022-12-14 09:29:30,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-12-14 09:29:30,225 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1174 transitions. [2022-12-14 09:29:30,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 09:29:30,226 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:30,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:29:30,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 09:29:30,226 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:30,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:30,226 INFO L85 PathProgramCache]: Analyzing trace with hash -539979378, now seen corresponding path program 1 times [2022-12-14 09:29:30,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:29:30,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49663064] [2022-12-14 09:29:30,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:30,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:29:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:30,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:29:30,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49663064] [2022-12-14 09:29:30,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49663064] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:30,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:30,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:29:30,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123225463] [2022-12-14 09:29:30,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:30,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:29:30,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:29:30,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:29:30,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:30,260 INFO L87 Difference]: Start difference. First operand 450 states and 1174 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-12-14 09:29:30,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:30,326 INFO L93 Difference]: Finished difference Result 468 states and 1221 transitions. [2022-12-14 09:29:30,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:29:30,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2022-12-14 09:29:30,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:30,330 INFO L225 Difference]: With dead ends: 468 [2022-12-14 09:29:30,331 INFO L226 Difference]: Without dead ends: 468 [2022-12-14 09:29:30,331 INFO L412 NwaCegarLoop]: 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 [2022-12-14 09:29:30,331 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:30,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:29:30,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-12-14 09:29:30,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 468. [2022-12-14 09:29:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 456 states have (on average 2.6776315789473686) internal successors, (1221), 467 states have internal predecessors, (1221), 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) [2022-12-14 09:29:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1221 transitions. [2022-12-14 09:29:30,340 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1221 transitions. Word has length 10 [2022-12-14 09:29:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:30,340 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 1221 transitions. [2022-12-14 09:29:30,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-12-14 09:29:30,341 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1221 transitions. [2022-12-14 09:29:30,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 09:29:30,341 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:30,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:29:30,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 09:29:30,341 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:30,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:30,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1491894968, now seen corresponding path program 1 times [2022-12-14 09:29:30,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:29:30,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680645166] [2022-12-14 09:29:30,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:30,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:29:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:30,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:29:30,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680645166] [2022-12-14 09:29:30,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680645166] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:30,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:30,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:29:30,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874744577] [2022-12-14 09:29:30,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:30,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:29:30,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:29:30,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:29:30,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:30,369 INFO L87 Difference]: Start difference. First operand 468 states and 1221 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-12-14 09:29:30,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:30,431 INFO L93 Difference]: Finished difference Result 490 states and 1269 transitions. [2022-12-14 09:29:30,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:29:30,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 [2022-12-14 09:29:30,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:30,433 INFO L225 Difference]: With dead ends: 490 [2022-12-14 09:29:30,434 INFO L226 Difference]: Without dead ends: 490 [2022-12-14 09:29:30,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:30,434 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:30,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:29:30,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-12-14 09:29:30,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 454. [2022-12-14 09:29:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 442 states have (on average 2.678733031674208) internal successors, (1184), 453 states have internal predecessors, (1184), 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) [2022-12-14 09:29:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1184 transitions. [2022-12-14 09:29:30,448 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1184 transitions. Word has length 13 [2022-12-14 09:29:30,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:30,448 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 1184 transitions. [2022-12-14 09:29:30,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-12-14 09:29:30,448 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1184 transitions. [2022-12-14 09:29:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 09:29:30,449 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:30,449 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:29:30,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 09:29:30,449 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:30,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:30,450 INFO L85 PathProgramCache]: Analyzing trace with hash 2069164939, now seen corresponding path program 1 times [2022-12-14 09:29:30,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:29:30,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153950254] [2022-12-14 09:29:30,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:30,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:29:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:30,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:29:30,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153950254] [2022-12-14 09:29:30,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153950254] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:29:30,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560799095] [2022-12-14 09:29:30,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:30,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:29:30,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:29:30,700 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:29:30,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:29:30,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:30,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 09:29:30,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:30,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:29:30,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:29:30,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:29:30,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-12-14 09:29:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:30,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:29:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:31,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560799095] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:29:31,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [779333881] [2022-12-14 09:29:31,104 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:1621) 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-12-14 09:29:31,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:29:31,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2022-12-14 09:29:31,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522455534] [2022-12-14 09:29:31,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:29:31,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 09:29:31,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:29:31,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 09:29:31,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-12-14 09:29:31,106 INFO L87 Difference]: Start difference. First operand 454 states and 1184 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2022-12-14 09:29:31,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:31,760 INFO L93 Difference]: Finished difference Result 1080 states and 2799 transitions. [2022-12-14 09:29:31,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 09:29:31,761 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 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) Word has length 14 [2022-12-14 09:29:31,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:31,766 INFO L225 Difference]: With dead ends: 1080 [2022-12-14 09:29:31,766 INFO L226 Difference]: Without dead ends: 1080 [2022-12-14 09:29:31,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-12-14 09:29:31,767 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 233 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:31,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 0 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 09:29:31,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-12-14 09:29:31,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 778. [2022-12-14 09:29:31,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 766 states have (on average 2.754569190600522) internal successors, (2110), 777 states have internal predecessors, (2110), 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) [2022-12-14 09:29:31,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 2110 transitions. [2022-12-14 09:29:31,793 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 2110 transitions. Word has length 14 [2022-12-14 09:29:31,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:31,793 INFO L495 AbstractCegarLoop]: Abstraction has 778 states and 2110 transitions. [2022-12-14 09:29:31,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2022-12-14 09:29:31,793 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 2110 transitions. [2022-12-14 09:29:31,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 09:29:31,794 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:31,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:29:31,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:29:31,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 09:29:31,995 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:31,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:31,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1096756452, now seen corresponding path program 1 times [2022-12-14 09:29:31,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:29:31,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513932951] [2022-12-14 09:29:31,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:31,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:29:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:32,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:29:32,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513932951] [2022-12-14 09:29:32,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513932951] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:32,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:32,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:29:32,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694320424] [2022-12-14 09:29:32,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:32,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:29:32,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:29:32,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:29:32,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:32,068 INFO L87 Difference]: Start difference. First operand 778 states and 2110 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2022-12-14 09:29:32,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:32,130 INFO L93 Difference]: Finished difference Result 380 states and 871 transitions. [2022-12-14 09:29:32,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:29:32,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 18 [2022-12-14 09:29:32,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:32,132 INFO L225 Difference]: With dead ends: 380 [2022-12-14 09:29:32,133 INFO L226 Difference]: Without dead ends: 376 [2022-12-14 09:29:32,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:32,133 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:32,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:29:32,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-12-14 09:29:32,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 366. [2022-12-14 09:29:32,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 360 states have (on average 2.3333333333333335) internal successors, (840), 365 states have internal predecessors, (840), 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) [2022-12-14 09:29:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 840 transitions. [2022-12-14 09:29:32,143 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 840 transitions. Word has length 18 [2022-12-14 09:29:32,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:32,143 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 840 transitions. [2022-12-14 09:29:32,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2022-12-14 09:29:32,143 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 840 transitions. [2022-12-14 09:29:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 09:29:32,144 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:32,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:29:32,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 09:29:32,144 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:32,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:32,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2057759380, now seen corresponding path program 1 times [2022-12-14 09:29:32,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:29:32,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203222018] [2022-12-14 09:29:32,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:32,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:29:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:32,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:32,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:29:32,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203222018] [2022-12-14 09:29:32,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203222018] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:32,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:32,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:29:32,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763166292] [2022-12-14 09:29:32,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:32,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:29:32,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:29:32,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:29:32,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:29:32,217 INFO L87 Difference]: Start difference. First operand 366 states and 840 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-12-14 09:29:32,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:32,310 INFO L93 Difference]: Finished difference Result 449 states and 1046 transitions. [2022-12-14 09:29:32,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:29:32,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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 19 [2022-12-14 09:29:32,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:32,313 INFO L225 Difference]: With dead ends: 449 [2022-12-14 09:29:32,313 INFO L226 Difference]: Without dead ends: 449 [2022-12-14 09:29:32,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:29:32,314 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:32,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:29:32,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-12-14 09:29:32,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 360. [2022-12-14 09:29:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 355 states have (on average 2.332394366197183) internal successors, (828), 359 states have internal predecessors, (828), 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) [2022-12-14 09:29:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 828 transitions. [2022-12-14 09:29:32,322 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 828 transitions. Word has length 19 [2022-12-14 09:29:32,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:32,322 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 828 transitions. [2022-12-14 09:29:32,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-12-14 09:29:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 828 transitions. [2022-12-14 09:29:32,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 09:29:32,322 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:32,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:29:32,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 09:29:32,323 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:32,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:32,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2057759381, now seen corresponding path program 1 times [2022-12-14 09:29:32,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:29:32,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294558214] [2022-12-14 09:29:32,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:32,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:29:32,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:32,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:29:32,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294558214] [2022-12-14 09:29:32,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294558214] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:32,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:32,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 09:29:32,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481658687] [2022-12-14 09:29:32,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:32,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 09:29:32,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:29:32,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 09:29:32,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:29:32,584 INFO L87 Difference]: Start difference. First operand 360 states and 828 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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) [2022-12-14 09:29:33,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:33,058 INFO L93 Difference]: Finished difference Result 514 states and 1159 transitions. [2022-12-14 09:29:33,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 09:29:33,059 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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 19 [2022-12-14 09:29:33,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:33,061 INFO L225 Difference]: With dead ends: 514 [2022-12-14 09:29:33,061 INFO L226 Difference]: Without dead ends: 514 [2022-12-14 09:29:33,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-12-14 09:29:33,062 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:33,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 0 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:29:33,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-12-14 09:29:33,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 410. [2022-12-14 09:29:33,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 405 states have (on average 2.3728395061728396) internal successors, (961), 409 states have internal predecessors, (961), 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) [2022-12-14 09:29:33,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 961 transitions. [2022-12-14 09:29:33,073 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 961 transitions. Word has length 19 [2022-12-14 09:29:33,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:33,073 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 961 transitions. [2022-12-14 09:29:33,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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) [2022-12-14 09:29:33,074 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 961 transitions. [2022-12-14 09:29:33,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 09:29:33,074 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:33,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:29:33,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 09:29:33,075 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:33,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:33,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1908529796, now seen corresponding path program 1 times [2022-12-14 09:29:33,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:29:33,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236663017] [2022-12-14 09:29:33,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:33,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:29:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:33,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:29:33,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236663017] [2022-12-14 09:29:33,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236663017] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:29:33,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042180211] [2022-12-14 09:29:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:33,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:29:33,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:29:33,133 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:29:33,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:29:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:33,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:29:33,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:29:33,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:29:33,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042180211] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:33,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:29:33,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-14 09:29:33,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818166963] [2022-12-14 09:29:33,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:33,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:29:33,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:29:33,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:29:33,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:29:33,227 INFO L87 Difference]: Start difference. First operand 410 states and 961 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-12-14 09:29:33,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:33,290 INFO L93 Difference]: Finished difference Result 580 states and 1320 transitions. [2022-12-14 09:29:33,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:29:33,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 21 [2022-12-14 09:29:33,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:33,293 INFO L225 Difference]: With dead ends: 580 [2022-12-14 09:29:33,293 INFO L226 Difference]: Without dead ends: 580 [2022-12-14 09:29:33,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:29:33,294 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:33,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:29:33,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-12-14 09:29:33,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 482. [2022-12-14 09:29:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 475 states have (on average 2.3305263157894736) internal successors, (1107), 481 states have internal predecessors, (1107), 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) [2022-12-14 09:29:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1107 transitions. [2022-12-14 09:29:33,306 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1107 transitions. Word has length 21 [2022-12-14 09:29:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:33,307 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 1107 transitions. [2022-12-14 09:29:33,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-12-14 09:29:33,307 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1107 transitions. [2022-12-14 09:29:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 09:29:33,308 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:33,308 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:29:33,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 09:29:33,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:29:33,508 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:33,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:33,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1821782188, now seen corresponding path program 1 times [2022-12-14 09:29:33,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:29:33,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953144787] [2022-12-14 09:29:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:33,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:29:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:34,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:29:34,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953144787] [2022-12-14 09:29:34,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953144787] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:34,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:34,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-14 09:29:34,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921749783] [2022-12-14 09:29:34,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:34,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 09:29:34,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:29:34,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 09:29:34,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-12-14 09:29:34,124 INFO L87 Difference]: Start difference. First operand 482 states and 1107 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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) [2022-12-14 09:29:34,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:34,802 INFO L93 Difference]: Finished difference Result 540 states and 1215 transitions. [2022-12-14 09:29:34,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 09:29:34,802 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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 21 [2022-12-14 09:29:34,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:34,804 INFO L225 Difference]: With dead ends: 540 [2022-12-14 09:29:34,804 INFO L226 Difference]: Without dead ends: 540 [2022-12-14 09:29:34,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-12-14 09:29:34,805 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 114 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:34,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 0 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:29:34,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-12-14 09:29:34,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 490. [2022-12-14 09:29:34,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 483 states have (on average 2.3167701863354035) internal successors, (1119), 489 states have internal predecessors, (1119), 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) [2022-12-14 09:29:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1119 transitions. [2022-12-14 09:29:34,817 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1119 transitions. Word has length 21 [2022-12-14 09:29:34,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:34,818 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 1119 transitions. [2022-12-14 09:29:34,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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) [2022-12-14 09:29:34,818 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1119 transitions. [2022-12-14 09:29:34,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 09:29:34,819 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:34,819 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 09:29:34,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 09:29:34,819 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:34,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:34,820 INFO L85 PathProgramCache]: Analyzing trace with hash -264784199, now seen corresponding path program 1 times [2022-12-14 09:29:34,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:29:34,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911216420] [2022-12-14 09:29:34,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:34,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:29:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:34,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:29:34,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911216420] [2022-12-14 09:29:34,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911216420] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:29:34,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96136768] [2022-12-14 09:29:34,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:34,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:29:34,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:29:34,912 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:29:34,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:29:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:35,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 09:29:35,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:35,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:29:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:35,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96136768] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:29:35,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [777410846] [2022-12-14 09:29:35,081 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:1621) 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-12-14 09:29:35,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:29:35,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-14 09:29:35,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315403721] [2022-12-14 09:29:35,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:29:35,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 09:29:35,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:29:35,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 09:29:35,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-12-14 09:29:35,083 INFO L87 Difference]: Start difference. First operand 490 states and 1119 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 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) [2022-12-14 09:29:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:35,338 INFO L93 Difference]: Finished difference Result 994 states and 2201 transitions. [2022-12-14 09:29:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 09:29:35,339 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 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 22 [2022-12-14 09:29:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:35,341 INFO L225 Difference]: With dead ends: 994 [2022-12-14 09:29:35,341 INFO L226 Difference]: Without dead ends: 994 [2022-12-14 09:29:35,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-12-14 09:29:35,342 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 150 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:35,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 0 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:29:35,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-12-14 09:29:35,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 752. [2022-12-14 09:29:35,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 745 states have (on average 2.3248322147651006) internal successors, (1732), 751 states have internal predecessors, (1732), 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) [2022-12-14 09:29:35,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1732 transitions. [2022-12-14 09:29:35,368 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1732 transitions. Word has length 22 [2022-12-14 09:29:35,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:35,368 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 1732 transitions. [2022-12-14 09:29:35,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 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) [2022-12-14 09:29:35,368 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1732 transitions. [2022-12-14 09:29:35,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 09:29:35,369 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:35,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:29:35,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 09:29:35,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 09:29:35,571 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:35,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:35,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1690162736, now seen corresponding path program 1 times [2022-12-14 09:29:35,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:29:35,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11335191] [2022-12-14 09:29:35,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:35,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:29:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:35,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:29:35,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:29:35,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11335191] [2022-12-14 09:29:35,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11335191] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:29:35,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124394084] [2022-12-14 09:29:35,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:35,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:29:35,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:29:35,616 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:29:35,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:29:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:35,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:29:35,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:29:35,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:29:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:29:35,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124394084] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:29:35,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [793094850] [2022-12-14 09:29:35,742 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:1621) 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-12-14 09:29:35,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:29:35,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 09:29:35,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271719691] [2022-12-14 09:29:35,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:29:35,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 09:29:35,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:29:35,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 09:29:35,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:29:35,744 INFO L87 Difference]: Start difference. First operand 752 states and 1732 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 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) [2022-12-14 09:29:35,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:35,872 INFO L93 Difference]: Finished difference Result 1038 states and 2298 transitions. [2022-12-14 09:29:35,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:29:35,873 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 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) Word has length 23 [2022-12-14 09:29:35,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:35,876 INFO L225 Difference]: With dead ends: 1038 [2022-12-14 09:29:35,877 INFO L226 Difference]: Without dead ends: 1038 [2022-12-14 09:29:35,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:29:35,877 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 95 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:35,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 0 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:29:35,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-12-14 09:29:35,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1014. [2022-12-14 09:29:35,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1005 states have (on average 2.2666666666666666) internal successors, (2278), 1013 states have internal predecessors, (2278), 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) [2022-12-14 09:29:35,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 2278 transitions. [2022-12-14 09:29:35,892 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 2278 transitions. Word has length 23 [2022-12-14 09:29:35,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:35,892 INFO L495 AbstractCegarLoop]: Abstraction has 1014 states and 2278 transitions. [2022-12-14 09:29:35,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 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) [2022-12-14 09:29:35,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 2278 transitions. [2022-12-14 09:29:35,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 09:29:35,893 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:35,893 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:29:35,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 09:29:36,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 09:29:36,095 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:36,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:36,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1507915028, now seen corresponding path program 1 times [2022-12-14 09:29:36,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:29:36,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493355013] [2022-12-14 09:29:36,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:36,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:29:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 09:29:36,222 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 09:29:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 09:29:36,279 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 09:29:36,279 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 09:29:36,280 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2022-12-14 09:29:36,282 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2022-12-14 09:29:36,282 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2022-12-14 09:29:36,282 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2022-12-14 09:29:36,282 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2022-12-14 09:29:36,283 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2022-12-14 09:29:36,283 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2022-12-14 09:29:36,283 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2022-12-14 09:29:36,283 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2022-12-14 09:29:36,283 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2022-12-14 09:29:36,283 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2022-12-14 09:29:36,283 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2022-12-14 09:29:36,283 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2022-12-14 09:29:36,283 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2022-12-14 09:29:36,284 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2022-12-14 09:29:36,284 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2022-12-14 09:29:36,284 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2022-12-14 09:29:36,284 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2022-12-14 09:29:36,284 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2022-12-14 09:29:36,284 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2022-12-14 09:29:36,284 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2022-12-14 09:29:36,284 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2022-12-14 09:29:36,285 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2022-12-14 09:29:36,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 09:29:36,287 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:29:36,292 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-14 09:29:36,292 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 09:29:36,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 09:29:36 BasicIcfg [2022-12-14 09:29:36,345 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 09:29:36,345 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 09:29:36,345 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 09:29:36,345 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 09:29:36,346 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:29:24" (3/4) ... [2022-12-14 09:29:36,348 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-14 09:29:36,348 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 09:29:36,349 INFO L158 Benchmark]: Toolchain (without parser) took 13096.86ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 114.2MB in the beginning and 59.5MB in the end (delta: 54.8MB). Peak memory consumption was 88.7MB. Max. memory is 16.1GB. [2022-12-14 09:29:36,349 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 125.8MB. Free memory was 87.6MB in the beginning and 87.6MB in the end (delta: 24.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 09:29:36,349 INFO L158 Benchmark]: CACSL2BoogieTranslator took 531.19ms. Allocated memory is still 157.3MB. Free memory was 114.2MB in the beginning and 84.8MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-12-14 09:29:36,350 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.38ms. Allocated memory is still 157.3MB. Free memory was 84.8MB in the beginning and 82.1MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:29:36,350 INFO L158 Benchmark]: Boogie Preprocessor took 29.42ms. Allocated memory is still 157.3MB. Free memory was 82.1MB in the beginning and 80.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:29:36,350 INFO L158 Benchmark]: RCFGBuilder took 421.32ms. Allocated memory is still 157.3MB. Free memory was 80.0MB in the beginning and 120.5MB in the end (delta: -40.5MB). Peak memory consumption was 21.5MB. Max. memory is 16.1GB. [2022-12-14 09:29:36,351 INFO L158 Benchmark]: TraceAbstraction took 12059.41ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 119.6MB in the beginning and 59.5MB in the end (delta: 60.1MB). Peak memory consumption was 92.4MB. Max. memory is 16.1GB. [2022-12-14 09:29:36,351 INFO L158 Benchmark]: Witness Printer took 3.22ms. Allocated memory is still 188.7MB. Free memory is still 59.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 09:29:36,353 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 125.8MB. Free memory was 87.6MB in the beginning and 87.6MB in the end (delta: 24.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 531.19ms. Allocated memory is still 157.3MB. Free memory was 114.2MB in the beginning and 84.8MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.38ms. Allocated memory is still 157.3MB. Free memory was 84.8MB in the beginning and 82.1MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.42ms. Allocated memory is still 157.3MB. Free memory was 82.1MB in the beginning and 80.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 421.32ms. Allocated memory is still 157.3MB. Free memory was 80.0MB in the beginning and 120.5MB in the end (delta: -40.5MB). Peak memory consumption was 21.5MB. Max. memory is 16.1GB. * TraceAbstraction took 12059.41ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 119.6MB in the beginning and 59.5MB in the end (delta: 60.1MB). Peak memory consumption was 92.4MB. Max. memory is 16.1GB. * Witness Printer took 3.22ms. Allocated memory is still 188.7MB. Free memory is still 59.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.1s, 192 PlacesBefore, 51 PlacesAfterwards, 195 TransitionsBefore, 50 TransitionsAfterwards, 11140 CoEnabledTransitionPairs, 6 FixpointIterations, 50 TrivialSequentialCompositions, 123 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 28 ConcurrentYvCompositions, 4 ChoiceCompositions, 205 TotalNumberOfCompositions, 15673 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 12267, independent: 12070, independent conditional: 0, independent unconditional: 12070, dependent: 197, dependent conditional: 0, dependent unconditional: 197, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 7992, independent: 7919, independent conditional: 0, independent unconditional: 7919, dependent: 73, dependent conditional: 0, dependent unconditional: 73, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 7992, independent: 7888, independent conditional: 0, independent unconditional: 7888, dependent: 104, dependent conditional: 0, dependent unconditional: 104, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 104, independent: 31, independent conditional: 0, independent unconditional: 31, dependent: 73, dependent conditional: 0, dependent unconditional: 73, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 160, independent: 32, independent conditional: 0, independent unconditional: 32, dependent: 128, dependent conditional: 0, dependent unconditional: 128, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 12267, independent: 4151, independent conditional: 0, independent unconditional: 4151, dependent: 124, dependent conditional: 0, dependent unconditional: 124, unknown: 7992, unknown conditional: 0, unknown unconditional: 7992] , Statistics on independence cache: Total cache size (in pairs): 449, Positive cache size: 423, Positive conditional cache size: 0, Positive unconditional cache size: 423, Negative cache size: 26, Negative conditional cache size: 0, Negative unconditional cache size: 26, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 940]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 940. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(400)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1019] 0 pthread_t id1, id2; [L1021] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=398, top=0] [L988] 1 int i; [L989] 1 unsigned int tmp; [L990] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L990] COND TRUE 1 i<(400) [L993] 1 tmp = __VERIFIER_nondet_uint() [L994] CALL 1 assume_abort_if_not(tmp < (400)) [L23] COND FALSE 1 !(!cond) [L994] RET 1 assume_abort_if_not(tmp < (400)) [L995] CALL, EXPR 1 push(arr,tmp) [L960] COND FALSE 1 !(top==(400)) VAL [\old(x)=399, arr={3:0}, flag=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=399] [L967] CALL, EXPR 1 get_top() [L952] 1 return top; VAL [\result=0, arr={3:0}, flag=0, m={4:0}, top=0] [L967] RET, EXPR 1 get_top() [L967] 1 stack[get_top()] = x [L968] CALL 1 inc_top() [L944] 1 top++ [L968] RET 1 inc_top() [L970] 1 return 0; [L995] RET, EXPR 1 push(arr,tmp) [L995] COND FALSE 1 !(push(arr,tmp)==(-1)) [L997] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=399, top=1] [L990] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=399, top=1] [L1022] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=1, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=399, top=1] [L1004] 2 int i; [L1005] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND FALSE 2 !(get_top()==0) [L981] CALL 2 dec_top() [L948] 2 top-- [L981] RET 2 dec_top() [L982] CALL, EXPR 2 get_top() [L952] 2 return top; [L982] RET, EXPR 2 get_top() [L982] EXPR 2 stack[get_top()] [L982] 2 return stack[get_top()]; [L1010] RET, EXPR 2 pop(arr) [L1010] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1005] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND TRUE 2 get_top()==0 [L977] 2 return (-2); [L1010] RET, EXPR 2 pop(arr) [L1010] COND TRUE 2 !(pop(arr)!=(-2)) [L1011] CALL 2 error() [L940] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 940]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 308 locations, 23 error locations. Started 1 CEGAR loops. OverallTime: 11.9s, OverallIterations: 19, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1159 SdHoareTripleChecker+Valid, 2.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1159 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 30 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4180 IncrementalHoareTripleChecker+Invalid, 4210 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 30 mSolverCounterUnsat, 0 mSDtfsCounter, 4180 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 226 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1014occurred in iteration=18, InterpolantAutomatonStates: 96, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 18 MinimizatonAttempts, 1006 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 321 NumberOfCodeBlocks, 321 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 331 ConstructedInterpolants, 0 QuantifiedInterpolants, 2112 SizeOfPredicates, 11 NumberOfNonLiveVariables, 921 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 25 InterpolantComputations, 15 PerfectInterpolantSequences, 10/59 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-14 09:29:36,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack_longer-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 --- 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-2329fc7 [2022-12-14 09:29:37,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:29:37,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:29:37,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:29:37,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:29:37,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:29:37,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:29:37,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:29:37,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:29:37,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:29:37,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:29:37,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:29:37,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:29:38,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:29:38,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:29:38,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:29:38,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:29:38,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:29:38,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:29:38,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:29:38,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:29:38,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:29:38,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:29:38,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:29:38,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:29:38,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:29:38,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:29:38,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:29:38,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:29:38,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:29:38,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:29:38,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:29:38,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:29:38,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:29:38,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:29:38,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:29:38,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:29:38,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:29:38,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:29:38,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:29:38,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:29:38,023 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 09:29:38,044 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:29:38,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:29:38,045 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:29:38,045 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:29:38,046 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:29:38,046 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:29:38,046 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:29:38,046 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:29:38,046 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:29:38,046 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:29:38,047 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:29:38,047 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:29:38,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 09:29:38,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 09:29:38,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:29:38,048 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:29:38,048 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 09:29:38,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:29:38,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:29:38,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:29:38,049 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 09:29:38,049 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 09:29:38,049 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 09:29:38,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:29:38,049 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 09:29:38,050 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 09:29:38,050 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 09:29:38,050 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:29:38,050 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:29:38,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:29:38,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 09:29:38,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:29:38,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:29:38,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:29:38,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:29:38,051 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 09:29:38,051 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 09:29:38,052 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:29:38,052 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 09:29:38,052 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 [2022-12-14 09:29:38,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:29:38,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:29:38,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:29:38,326 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:29:38,327 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:29:38,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/pthread/stack_longer-1.i [2022-12-14 09:29:40,876 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:29:41,109 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:29:41,110 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/sv-benchmarks/c/pthread/stack_longer-1.i [2022-12-14 09:29:41,122 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/data/2961bdb85/2fa7454a6d0947e1880071baae6d0fca/FLAGce9560e0c [2022-12-14 09:29:41,136 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/data/2961bdb85/2fa7454a6d0947e1880071baae6d0fca [2022-12-14 09:29:41,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:29:41,140 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:29:41,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:29:41,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:29:41,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:29:41,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:29:41" (1/1) ... [2022-12-14 09:29:41,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40157522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:41, skipping insertion in model container [2022-12-14 09:29:41,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:29:41" (1/1) ... [2022-12-14 09:29:41,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:29:41,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:29:41,510 WARN L237 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_21e7e49f-bfb4-409b-99d3-937a280e7656/sv-benchmarks/c/pthread/stack_longer-1.i[41527,41540] [2022-12-14 09:29:41,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:29:41,540 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:29:41,581 WARN L237 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_21e7e49f-bfb4-409b-99d3-937a280e7656/sv-benchmarks/c/pthread/stack_longer-1.i[41527,41540] [2022-12-14 09:29:41,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:29:41,651 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:29:41,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:41 WrapperNode [2022-12-14 09:29:41,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:29:41,653 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:29:41,653 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:29:41,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:29:41,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:41" (1/1) ... [2022-12-14 09:29:41,671 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:41" (1/1) ... [2022-12-14 09:29:41,687 INFO L138 Inliner]: procedures = 281, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 151 [2022-12-14 09:29:41,687 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:29:41,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:29:41,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:29:41,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:29:41,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:41" (1/1) ... [2022-12-14 09:29:41,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:41" (1/1) ... [2022-12-14 09:29:41,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:41" (1/1) ... [2022-12-14 09:29:41,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:41" (1/1) ... [2022-12-14 09:29:41,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:41" (1/1) ... [2022-12-14 09:29:41,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:41" (1/1) ... [2022-12-14 09:29:41,706 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:41" (1/1) ... [2022-12-14 09:29:41,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:41" (1/1) ... [2022-12-14 09:29:41,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:29:41,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:29:41,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:29:41,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:29:41,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:41" (1/1) ... [2022-12-14 09:29:41,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:29:41,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:29:41,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:29:41,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:29:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 09:29:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-14 09:29:41,759 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-14 09:29:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-14 09:29:41,760 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-14 09:29:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 09:29:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:29:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 09:29:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 09:29:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-12-14 09:29:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-14 09:29:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:29:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:29:41,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:29:41,761 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 09:29:41,880 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:29:41,882 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:29:42,170 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:29:42,178 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:29:42,179 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 09:29:42,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:29:42 BoogieIcfgContainer [2022-12-14 09:29:42,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:29:42,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:29:42,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:29:42,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:29:42,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:29:41" (1/3) ... [2022-12-14 09:29:42,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e7e5a41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:29:42, skipping insertion in model container [2022-12-14 09:29:42,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:41" (2/3) ... [2022-12-14 09:29:42,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e7e5a41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:29:42, skipping insertion in model container [2022-12-14 09:29:42,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:29:42" (3/3) ... [2022-12-14 09:29:42,189 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2022-12-14 09:29:42,206 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:29:42,206 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-12-14 09:29:42,206 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 09:29:42,288 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-14 09:29:42,317 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 09:29:42,328 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 188 places, 191 transitions, 398 flow [2022-12-14 09:29:42,330 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 188 places, 191 transitions, 398 flow [2022-12-14 09:29:42,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 191 transitions, 398 flow [2022-12-14 09:29:42,391 INFO L130 PetriNetUnfolder]: 10/189 cut-off events. [2022-12-14 09:29:42,391 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 09:29:42,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 189 events. 10/189 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 492 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 138. Up to 3 conditions per place. [2022-12-14 09:29:42,405 INFO L119 LiptonReduction]: Number of co-enabled transitions 10398 [2022-12-14 09:29:51,555 INFO L134 LiptonReduction]: Checked pairs total: 14771 [2022-12-14 09:29:51,555 INFO L136 LiptonReduction]: Total number of compositions: 197 [2022-12-14 09:29:51,561 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 49 transitions, 114 flow [2022-12-14 09:29:51,597 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 786 states, 720 states have (on average 3.1125) internal successors, (2241), 785 states have internal predecessors, (2241), 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) [2022-12-14 09:29:51,610 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:29:51,614 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@7d831c7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:29:51,614 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-12-14 09:29:51,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 786 states, 720 states have (on average 3.1125) internal successors, (2241), 785 states have internal predecessors, (2241), 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) [2022-12-14 09:29:51,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-12-14 09:29:51,620 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:51,621 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-12-14 09:29:51,621 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:51,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:51,625 INFO L85 PathProgramCache]: Analyzing trace with hash 785, now seen corresponding path program 1 times [2022-12-14 09:29:51,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:29:51,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999696788] [2022-12-14 09:29:51,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:51,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:51,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:29:51,635 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:29:51,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 09:29:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:51,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 09:29:51,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:51,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:29:51,712 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:29:51,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999696788] [2022-12-14 09:29:51,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999696788] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:51,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:51,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-14 09:29:51,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033698266] [2022-12-14 09:29:51,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:51,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 09:29:51,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:29:51,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 09:29:51,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 09:29:51,736 INFO L87 Difference]: Start difference. First operand has 786 states, 720 states have (on average 3.1125) internal successors, (2241), 785 states have internal predecessors, (2241), 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 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-12-14 09:29:51,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:51,884 INFO L93 Difference]: Finished difference Result 784 states and 2239 transitions. [2022-12-14 09:29:51,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 09:29:51,887 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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 1 [2022-12-14 09:29:51,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:51,901 INFO L225 Difference]: With dead ends: 784 [2022-12-14 09:29:51,901 INFO L226 Difference]: Without dead ends: 784 [2022-12-14 09:29:51,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 09:29:51,904 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 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, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:51,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:29:51,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-12-14 09:29:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2022-12-14 09:29:51,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 720 states have (on average 3.109722222222222) internal successors, (2239), 783 states have internal predecessors, (2239), 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) [2022-12-14 09:29:51,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2239 transitions. [2022-12-14 09:29:51,969 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2239 transitions. Word has length 1 [2022-12-14 09:29:51,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:51,969 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 2239 transitions. [2022-12-14 09:29:51,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-12-14 09:29:51,969 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2239 transitions. [2022-12-14 09:29:51,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 09:29:51,970 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:51,970 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 09:29:51,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:29:52,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:52,172 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:52,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:52,174 INFO L85 PathProgramCache]: Analyzing trace with hash 773273, now seen corresponding path program 1 times [2022-12-14 09:29:52,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:29:52,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25248581] [2022-12-14 09:29:52,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:52,177 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:52,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:29:52,180 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:29:52,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 09:29:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:52,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:29:52,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:52,405 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:29:52,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 19 [2022-12-14 09:29:52,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:52,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:29:52,416 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:29:52,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25248581] [2022-12-14 09:29:52,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25248581] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:52,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:52,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:29:52,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064592124] [2022-12-14 09:29:52,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:52,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:29:52,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:29:52,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:29:52,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:52,419 INFO L87 Difference]: Start difference. First operand 784 states and 2239 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-12-14 09:29:52,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:52,524 INFO L93 Difference]: Finished difference Result 758 states and 2184 transitions. [2022-12-14 09:29:52,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:29:52,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2022-12-14 09:29:52,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:52,532 INFO L225 Difference]: With dead ends: 758 [2022-12-14 09:29:52,532 INFO L226 Difference]: Without dead ends: 758 [2022-12-14 09:29:52,532 INFO L412 NwaCegarLoop]: 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 [2022-12-14 09:29:52,533 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:52,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:29:52,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-12-14 09:29:52,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 758. [2022-12-14 09:29:52,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 702 states have (on average 3.111111111111111) internal successors, (2184), 757 states have internal predecessors, (2184), 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) [2022-12-14 09:29:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2184 transitions. [2022-12-14 09:29:52,552 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2184 transitions. Word has length 3 [2022-12-14 09:29:52,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:52,552 INFO L495 AbstractCegarLoop]: Abstraction has 758 states and 2184 transitions. [2022-12-14 09:29:52,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-12-14 09:29:52,552 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2184 transitions. [2022-12-14 09:29:52,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 09:29:52,553 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:52,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 09:29:52,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 09:29:52,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:52,756 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:52,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:52,757 INFO L85 PathProgramCache]: Analyzing trace with hash 773274, now seen corresponding path program 1 times [2022-12-14 09:29:52,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:29:52,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141885570] [2022-12-14 09:29:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:52,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:52,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:29:52,763 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:29:52,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 09:29:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:52,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:29:52,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:52,999 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:29:52,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 09:29:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:53,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:29:53,019 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:29:53,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141885570] [2022-12-14 09:29:53,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141885570] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:53,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:53,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:29:53,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019834738] [2022-12-14 09:29:53,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:53,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:29:53,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:29:53,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:29:53,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:53,021 INFO L87 Difference]: Start difference. First operand 758 states and 2184 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-12-14 09:29:53,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:53,118 INFO L93 Difference]: Finished difference Result 732 states and 2129 transitions. [2022-12-14 09:29:53,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:29:53,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2022-12-14 09:29:53,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:53,122 INFO L225 Difference]: With dead ends: 732 [2022-12-14 09:29:53,122 INFO L226 Difference]: Without dead ends: 732 [2022-12-14 09:29:53,122 INFO L412 NwaCegarLoop]: 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 [2022-12-14 09:29:53,123 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:53,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:29:53,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-12-14 09:29:53,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 732. [2022-12-14 09:29:53,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 684 states have (on average 3.1125730994152048) internal successors, (2129), 731 states have internal predecessors, (2129), 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) [2022-12-14 09:29:53,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2129 transitions. [2022-12-14 09:29:53,138 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2129 transitions. Word has length 3 [2022-12-14 09:29:53,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:53,139 INFO L495 AbstractCegarLoop]: Abstraction has 732 states and 2129 transitions. [2022-12-14 09:29:53,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-12-14 09:29:53,139 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2129 transitions. [2022-12-14 09:29:53,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 09:29:53,139 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:53,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 09:29:53,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 09:29:53,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:53,341 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:53,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:53,342 INFO L85 PathProgramCache]: Analyzing trace with hash 743135238, now seen corresponding path program 1 times [2022-12-14 09:29:53,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:29:53,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796881985] [2022-12-14 09:29:53,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:53,343 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:53,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:29:53,345 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:29:53,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 09:29:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:53,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:29:53,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:53,519 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 09:29:53,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 09:29:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:53,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:29:53,542 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:29:53,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796881985] [2022-12-14 09:29:53,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796881985] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:53,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:53,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:29:53,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989630756] [2022-12-14 09:29:53,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:53,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:29:53,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:29:53,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:29:53,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:53,543 INFO L87 Difference]: Start difference. First operand 732 states and 2129 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-12-14 09:29:53,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:53,633 INFO L93 Difference]: Finished difference Result 563 states and 1583 transitions. [2022-12-14 09:29:53,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:29:53,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-12-14 09:29:53,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:53,636 INFO L225 Difference]: With dead ends: 563 [2022-12-14 09:29:53,636 INFO L226 Difference]: Without dead ends: 563 [2022-12-14 09:29:53,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:53,636 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:53,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 0 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:29:53,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-12-14 09:29:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2022-12-14 09:29:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 531 states have (on average 2.981167608286252) internal successors, (1583), 562 states have internal predecessors, (1583), 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) [2022-12-14 09:29:53,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1583 transitions. [2022-12-14 09:29:53,648 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1583 transitions. Word has length 5 [2022-12-14 09:29:53,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:53,649 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 1583 transitions. [2022-12-14 09:29:53,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-12-14 09:29:53,649 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1583 transitions. [2022-12-14 09:29:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 09:29:53,649 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:53,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 09:29:53,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-14 09:29:53,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:53,851 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:53,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:53,851 INFO L85 PathProgramCache]: Analyzing trace with hash 743135239, now seen corresponding path program 1 times [2022-12-14 09:29:53,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:29:53,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124478439] [2022-12-14 09:29:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:53,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:53,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:29:53,852 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:29:53,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 09:29:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:53,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:29:53,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:53,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:53,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:29:53,960 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:29:53,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124478439] [2022-12-14 09:29:53,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124478439] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:53,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:53,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:29:53,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337358599] [2022-12-14 09:29:53,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:53,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:29:53,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:29:53,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:29:53,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:53,961 INFO L87 Difference]: Start difference. First operand 563 states and 1583 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-12-14 09:29:54,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:54,078 INFO L93 Difference]: Finished difference Result 394 states and 1037 transitions. [2022-12-14 09:29:54,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:29:54,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-12-14 09:29:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:54,083 INFO L225 Difference]: With dead ends: 394 [2022-12-14 09:29:54,083 INFO L226 Difference]: Without dead ends: 394 [2022-12-14 09:29:54,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:54,089 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:54,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:29:54,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-12-14 09:29:54,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2022-12-14 09:29:54,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 378 states have (on average 2.7433862433862433) internal successors, (1037), 393 states have internal predecessors, (1037), 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) [2022-12-14 09:29:54,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1037 transitions. [2022-12-14 09:29:54,102 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1037 transitions. Word has length 5 [2022-12-14 09:29:54,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:54,102 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 1037 transitions. [2022-12-14 09:29:54,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-12-14 09:29:54,103 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1037 transitions. [2022-12-14 09:29:54,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:29:54,103 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:54,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:29:54,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-14 09:29:54,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:54,304 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:54,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:54,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1561294275, now seen corresponding path program 1 times [2022-12-14 09:29:54,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:29:54,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392195914] [2022-12-14 09:29:54,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:54,305 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:54,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:29:54,306 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:29:54,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 09:29:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:54,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:29:54,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:54,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:54,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:29:54,366 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:29:54,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392195914] [2022-12-14 09:29:54,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392195914] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:54,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:54,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:29:54,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500673699] [2022-12-14 09:29:54,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:54,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:29:54,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:29:54,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:29:54,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:54,368 INFO L87 Difference]: Start difference. First operand 394 states and 1037 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-12-14 09:29:54,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:54,502 INFO L93 Difference]: Finished difference Result 578 states and 1502 transitions. [2022-12-14 09:29:54,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:29:54,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2022-12-14 09:29:54,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:54,508 INFO L225 Difference]: With dead ends: 578 [2022-12-14 09:29:54,508 INFO L226 Difference]: Without dead ends: 578 [2022-12-14 09:29:54,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:54,508 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:54,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:29:54,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-12-14 09:29:54,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 540. [2022-12-14 09:29:54,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 524 states have (on average 2.7786259541984735) internal successors, (1456), 539 states have internal predecessors, (1456), 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) [2022-12-14 09:29:54,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1456 transitions. [2022-12-14 09:29:54,520 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1456 transitions. Word has length 6 [2022-12-14 09:29:54,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:54,520 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 1456 transitions. [2022-12-14 09:29:54,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-12-14 09:29:54,520 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1456 transitions. [2022-12-14 09:29:54,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:29:54,520 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:54,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:29:54,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 09:29:54,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:54,721 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:54,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:54,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1561291340, now seen corresponding path program 1 times [2022-12-14 09:29:54,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:29:54,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459528172] [2022-12-14 09:29:54,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:54,722 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:54,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:29:54,723 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:29:54,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 09:29:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:54,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 09:29:54,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:54,830 INFO L321 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2022-12-14 09:29:54,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 34 [2022-12-14 09:29:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:54,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:29:54,957 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:29:54,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459528172] [2022-12-14 09:29:54,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459528172] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:54,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:54,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:29:54,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039736726] [2022-12-14 09:29:54,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:54,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:29:54,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:29:54,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:29:54,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:29:54,959 INFO L87 Difference]: Start difference. First operand 540 states and 1456 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-12-14 09:29:55,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:55,173 INFO L93 Difference]: Finished difference Result 537 states and 1440 transitions. [2022-12-14 09:29:55,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:29:55,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-12-14 09:29:55,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:55,176 INFO L225 Difference]: With dead ends: 537 [2022-12-14 09:29:55,176 INFO L226 Difference]: Without dead ends: 537 [2022-12-14 09:29:55,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:29:55,177 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:55,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:29:55,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-12-14 09:29:55,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 500. [2022-12-14 09:29:55,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 488 states have (on average 2.762295081967213) internal successors, (1348), 499 states have internal predecessors, (1348), 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) [2022-12-14 09:29:55,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1348 transitions. [2022-12-14 09:29:55,187 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1348 transitions. Word has length 6 [2022-12-14 09:29:55,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:55,188 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 1348 transitions. [2022-12-14 09:29:55,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-12-14 09:29:55,188 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1348 transitions. [2022-12-14 09:29:55,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:29:55,188 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:55,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:29:55,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-14 09:29:55,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:55,389 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:55,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:55,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1561291341, now seen corresponding path program 1 times [2022-12-14 09:29:55,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:29:55,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352357665] [2022-12-14 09:29:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:55,391 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:55,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:29:55,392 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:29:55,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-14 09:29:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:55,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 09:29:55,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:55,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:29:55,553 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 09:29:55,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2022-12-14 09:29:55,567 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 09:29:55,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 13 [2022-12-14 09:29:55,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:55,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:29:55,701 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:29:55,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352357665] [2022-12-14 09:29:55,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352357665] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:55,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:55,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:29:55,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655801997] [2022-12-14 09:29:55,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:55,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:29:55,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:29:55,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:29:55,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:29:55,703 INFO L87 Difference]: Start difference. First operand 500 states and 1348 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-12-14 09:29:55,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:55,984 INFO L93 Difference]: Finished difference Result 594 states and 1591 transitions. [2022-12-14 09:29:55,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:29:55,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-12-14 09:29:55,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:55,987 INFO L225 Difference]: With dead ends: 594 [2022-12-14 09:29:55,987 INFO L226 Difference]: Without dead ends: 594 [2022-12-14 09:29:55,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:29:55,988 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:55,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:29:55,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-12-14 09:29:55,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 532. [2022-12-14 09:29:56,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 520 states have (on average 2.7826923076923076) internal successors, (1447), 531 states have internal predecessors, (1447), 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) [2022-12-14 09:29:56,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1447 transitions. [2022-12-14 09:29:56,003 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1447 transitions. Word has length 6 [2022-12-14 09:29:56,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:56,003 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 1447 transitions. [2022-12-14 09:29:56,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-12-14 09:29:56,003 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1447 transitions. [2022-12-14 09:29:56,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 09:29:56,004 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:56,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:29:56,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-14 09:29:56,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:56,206 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:56,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:56,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1814835541, now seen corresponding path program 1 times [2022-12-14 09:29:56,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:29:56,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552047005] [2022-12-14 09:29:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:56,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:56,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:29:56,213 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:29:56,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-14 09:29:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:56,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:29:56,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:56,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:29:56,346 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:29:56,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552047005] [2022-12-14 09:29:56,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552047005] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:56,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:56,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:29:56,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772947650] [2022-12-14 09:29:56,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:56,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:29:56,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:29:56,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:29:56,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:56,347 INFO L87 Difference]: Start difference. First operand 532 states and 1447 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-12-14 09:29:56,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:56,431 INFO L93 Difference]: Finished difference Result 698 states and 1866 transitions. [2022-12-14 09:29:56,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:29:56,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2022-12-14 09:29:56,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:56,433 INFO L225 Difference]: With dead ends: 698 [2022-12-14 09:29:56,433 INFO L226 Difference]: Without dead ends: 690 [2022-12-14 09:29:56,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:56,434 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:56,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:29:56,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-12-14 09:29:56,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 612. [2022-12-14 09:29:56,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 598 states have (on average 2.8043478260869565) internal successors, (1677), 611 states have internal predecessors, (1677), 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) [2022-12-14 09:29:56,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1677 transitions. [2022-12-14 09:29:56,449 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1677 transitions. Word has length 8 [2022-12-14 09:29:56,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:56,449 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 1677 transitions. [2022-12-14 09:29:56,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-12-14 09:29:56,449 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1677 transitions. [2022-12-14 09:29:56,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 09:29:56,450 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:56,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:29:56,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-12-14 09:29:56,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:56,652 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:56,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:56,653 INFO L85 PathProgramCache]: Analyzing trace with hash 365520629, now seen corresponding path program 1 times [2022-12-14 09:29:56,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:29:56,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167916200] [2022-12-14 09:29:56,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:56,655 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:56,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:29:56,657 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:29:56,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 09:29:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:56,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:29:56,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:56,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:29:56,875 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:29:56,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167916200] [2022-12-14 09:29:56,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167916200] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:56,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:56,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:29:56,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785626078] [2022-12-14 09:29:56,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:56,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:29:56,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:29:56,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:29:56,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:56,876 INFO L87 Difference]: Start difference. First operand 612 states and 1677 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-12-14 09:29:56,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:56,977 INFO L93 Difference]: Finished difference Result 658 states and 1802 transitions. [2022-12-14 09:29:56,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:29:56,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2022-12-14 09:29:56,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:56,980 INFO L225 Difference]: With dead ends: 658 [2022-12-14 09:29:56,980 INFO L226 Difference]: Without dead ends: 658 [2022-12-14 09:29:56,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:56,981 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:56,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:29:56,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-12-14 09:29:56,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 658. [2022-12-14 09:29:56,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 644 states have (on average 2.798136645962733) internal successors, (1802), 657 states have internal predecessors, (1802), 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) [2022-12-14 09:29:56,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1802 transitions. [2022-12-14 09:29:56,990 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1802 transitions. Word has length 10 [2022-12-14 09:29:56,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:56,990 INFO L495 AbstractCegarLoop]: Abstraction has 658 states and 1802 transitions. [2022-12-14 09:29:56,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-12-14 09:29:56,990 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1802 transitions. [2022-12-14 09:29:56,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 09:29:56,991 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:56,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:29:56,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-14 09:29:57,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:57,193 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:57,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:57,194 INFO L85 PathProgramCache]: Analyzing trace with hash -330186192, now seen corresponding path program 1 times [2022-12-14 09:29:57,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:29:57,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598017524] [2022-12-14 09:29:57,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:57,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:57,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:29:57,199 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:29:57,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 09:29:57,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:57,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:29:57,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:57,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:29:57,309 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:29:57,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598017524] [2022-12-14 09:29:57,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598017524] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:29:57,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:29:57,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:29:57,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660649137] [2022-12-14 09:29:57,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:29:57,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:29:57,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:29:57,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:29:57,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:57,310 INFO L87 Difference]: Start difference. First operand 658 states and 1802 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-12-14 09:29:57,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:57,404 INFO L93 Difference]: Finished difference Result 734 states and 1997 transitions. [2022-12-14 09:29:57,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:29:57,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 [2022-12-14 09:29:57,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:57,406 INFO L225 Difference]: With dead ends: 734 [2022-12-14 09:29:57,407 INFO L226 Difference]: Without dead ends: 734 [2022-12-14 09:29:57,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:29:57,407 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:57,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:29:57,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-12-14 09:29:57,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 652. [2022-12-14 09:29:57,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 638 states have (on average 2.7946708463949843) internal successors, (1783), 651 states have internal predecessors, (1783), 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) [2022-12-14 09:29:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1783 transitions. [2022-12-14 09:29:57,421 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1783 transitions. Word has length 13 [2022-12-14 09:29:57,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:57,421 INFO L495 AbstractCegarLoop]: Abstraction has 652 states and 1783 transitions. [2022-12-14 09:29:57,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-12-14 09:29:57,421 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1783 transitions. [2022-12-14 09:29:57,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 09:29:57,421 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:57,422 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:29:57,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-12-14 09:29:57,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:57,622 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:57,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:57,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1208520843, now seen corresponding path program 1 times [2022-12-14 09:29:57,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:29:57,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163241125] [2022-12-14 09:29:57,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:57,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:57,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:29:57,624 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:29:57,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-14 09:29:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:57,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:29:57,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:57,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:29:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:57,744 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:29:57,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163241125] [2022-12-14 09:29:57,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163241125] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:29:57,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1181199297] [2022-12-14 09:29:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:57,745 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:29:57,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:29:57,746 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:29:57,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-12-14 09:29:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:57,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:29:57,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:57,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:57,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:29:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:57,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1181199297] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:29:57,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758915877] [2022-12-14 09:29:57,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:57,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:29:57,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:29:57,859 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:29:57,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 09:29:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:57,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:29:57,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:57,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:29:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:57,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758915877] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:29:57,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:29:57,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2022-12-14 09:29:57,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885704084] [2022-12-14 09:29:57,951 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:29:57,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:29:57,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:29:57,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:29:57,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:29:57,951 INFO L87 Difference]: Start difference. First operand 652 states and 1783 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-12-14 09:29:58,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:29:58,375 INFO L93 Difference]: Finished difference Result 1800 states and 4769 transitions. [2022-12-14 09:29:58,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 09:29:58,376 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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 [2022-12-14 09:29:58,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:29:58,380 INFO L225 Difference]: With dead ends: 1800 [2022-12-14 09:29:58,381 INFO L226 Difference]: Without dead ends: 1800 [2022-12-14 09:29:58,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:29:58,381 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 174 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:29:58,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 0 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:29:58,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2022-12-14 09:29:58,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1288. [2022-12-14 09:29:58,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1274 states have (on average 2.8759811616954476) internal successors, (3664), 1287 states have internal predecessors, (3664), 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) [2022-12-14 09:29:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 3664 transitions. [2022-12-14 09:29:58,404 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 3664 transitions. Word has length 14 [2022-12-14 09:29:58,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:29:58,404 INFO L495 AbstractCegarLoop]: Abstraction has 1288 states and 3664 transitions. [2022-12-14 09:29:58,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-12-14 09:29:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 3664 transitions. [2022-12-14 09:29:58,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 09:29:58,405 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:29:58,405 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:29:58,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-14 09:29:58,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 09:29:58,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-12-14 09:29:59,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 09:29:59,007 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:29:59,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:29:59,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1208523777, now seen corresponding path program 1 times [2022-12-14 09:29:59,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:29:59,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746870585] [2022-12-14 09:29:59,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:59,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:29:59,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:29:59,013 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:29:59,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-14 09:29:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:59,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 09:29:59,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:59,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:29:59,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:29:59,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:29:59,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-12-14 09:29:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:59,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:29:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:59,621 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:29:59,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746870585] [2022-12-14 09:29:59,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746870585] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:29:59,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [620529322] [2022-12-14 09:29:59,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:29:59,622 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:29:59,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:29:59,622 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:29:59,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-12-14 09:29:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:29:59,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 09:29:59,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:59,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:29:59,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:29:59,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:29:59,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-12-14 09:29:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:59,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:30:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:30:00,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [620529322] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:30:00,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241449154] [2022-12-14 09:30:00,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:30:00,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:30:00,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:30:00,024 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:30:00,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 09:30:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:30:00,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 09:30:00,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:30:00,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:30:00,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:30:00,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:30:00,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-12-14 09:30:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:30:00,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:30:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:30:00,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241449154] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:30:00,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:30:00,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 6, 7] total 13 [2022-12-14 09:30:00,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034819745] [2022-12-14 09:30:00,768 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:30:00,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 09:30:00,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:30:00,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 09:30:00,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-12-14 09:30:00,769 INFO L87 Difference]: Start difference. First operand 1288 states and 3664 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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) [2022-12-14 09:30:03,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:30:03,209 INFO L93 Difference]: Finished difference Result 2168 states and 6029 transitions. [2022-12-14 09:30:03,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 09:30:03,211 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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 [2022-12-14 09:30:03,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:30:03,217 INFO L225 Difference]: With dead ends: 2168 [2022-12-14 09:30:03,217 INFO L226 Difference]: Without dead ends: 2168 [2022-12-14 09:30:03,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2022-12-14 09:30:03,217 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 229 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:30:03,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 0 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 09:30:03,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2022-12-14 09:30:03,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 1722. [2022-12-14 09:30:03,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1708 states have (on average 2.8682669789227164) internal successors, (4899), 1721 states have internal predecessors, (4899), 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) [2022-12-14 09:30:03,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 4899 transitions. [2022-12-14 09:30:03,245 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 4899 transitions. Word has length 14 [2022-12-14 09:30:03,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:30:03,245 INFO L495 AbstractCegarLoop]: Abstraction has 1722 states and 4899 transitions. [2022-12-14 09:30:03,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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) [2022-12-14 09:30:03,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 4899 transitions. [2022-12-14 09:30:03,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 09:30:03,246 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:30:03,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:30:03,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2022-12-14 09:30:03,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 09:30:03,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-14 09:30:03,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:03,848 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:30:03,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:30:03,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1305318971, now seen corresponding path program 1 times [2022-12-14 09:30:03,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:30:03,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127089701] [2022-12-14 09:30:03,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:30:03,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:03,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:30:03,854 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:30:03,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-14 09:30:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:30:03,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:30:03,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:30:03,984 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 9 [2022-12-14 09:30:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:30:03,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:30:03,999 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:30:03,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127089701] [2022-12-14 09:30:03,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127089701] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:30:03,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:30:03,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:30:03,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919525859] [2022-12-14 09:30:03,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:30:04,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:30:04,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:30:04,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:30:04,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:30:04,000 INFO L87 Difference]: Start difference. First operand 1722 states and 4899 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2022-12-14 09:30:04,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:30:04,086 INFO L93 Difference]: Finished difference Result 670 states and 1625 transitions. [2022-12-14 09:30:04,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:30:04,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 18 [2022-12-14 09:30:04,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:30:04,091 INFO L225 Difference]: With dead ends: 670 [2022-12-14 09:30:04,092 INFO L226 Difference]: Without dead ends: 650 [2022-12-14 09:30:04,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:30:04,092 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:30:04,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:30:04,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-12-14 09:30:04,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 542. [2022-12-14 09:30:04,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 536 states have (on average 2.457089552238806) internal successors, (1317), 541 states have internal predecessors, (1317), 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) [2022-12-14 09:30:04,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1317 transitions. [2022-12-14 09:30:04,099 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1317 transitions. Word has length 18 [2022-12-14 09:30:04,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:30:04,100 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 1317 transitions. [2022-12-14 09:30:04,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2022-12-14 09:30:04,100 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1317 transitions. [2022-12-14 09:30:04,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 09:30:04,100 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:30:04,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:30:04,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-14 09:30:04,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:04,301 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:30:04,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:30:04,301 INFO L85 PathProgramCache]: Analyzing trace with hash 453018690, now seen corresponding path program 1 times [2022-12-14 09:30:04,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:30:04,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339616810] [2022-12-14 09:30:04,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:30:04,302 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:04,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:30:04,303 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:30:04,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-14 09:30:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:30:04,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 09:30:04,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:30:04,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:30:04,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:30:04,593 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:30:04,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339616810] [2022-12-14 09:30:04,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339616810] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:30:04,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:30:04,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 09:30:04,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396633759] [2022-12-14 09:30:04,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:30:04,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 09:30:04,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:30:04,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 09:30:04,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:30:04,594 INFO L87 Difference]: Start difference. First operand 542 states and 1317 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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) [2022-12-14 09:30:05,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:30:05,537 INFO L93 Difference]: Finished difference Result 814 states and 1947 transitions. [2022-12-14 09:30:05,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 09:30:05,538 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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 19 [2022-12-14 09:30:05,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:30:05,540 INFO L225 Difference]: With dead ends: 814 [2022-12-14 09:30:05,540 INFO L226 Difference]: Without dead ends: 814 [2022-12-14 09:30:05,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-12-14 09:30:05,540 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 121 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:30:05,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 0 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 09:30:05,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-12-14 09:30:05,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 632. [2022-12-14 09:30:05,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 626 states have (on average 2.5079872204472844) internal successors, (1570), 631 states have internal predecessors, (1570), 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) [2022-12-14 09:30:05,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1570 transitions. [2022-12-14 09:30:05,552 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1570 transitions. Word has length 19 [2022-12-14 09:30:05,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:30:05,553 INFO L495 AbstractCegarLoop]: Abstraction has 632 states and 1570 transitions. [2022-12-14 09:30:05,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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) [2022-12-14 09:30:05,553 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1570 transitions. [2022-12-14 09:30:05,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 09:30:05,553 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:30:05,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:30:05,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-14 09:30:05,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:05,755 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:30:05,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:30:05,756 INFO L85 PathProgramCache]: Analyzing trace with hash 453018691, now seen corresponding path program 1 times [2022-12-14 09:30:05,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:30:05,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114066004] [2022-12-14 09:30:05,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:30:05,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:05,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:30:05,761 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:30:05,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-14 09:30:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:30:05,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 09:30:05,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:30:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:30:05,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:30:05,976 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:30:05,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114066004] [2022-12-14 09:30:05,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114066004] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:30:05,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:30:05,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:30:05,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464963228] [2022-12-14 09:30:05,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:30:05,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:30:05,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:30:05,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:30:05,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:30:05,978 INFO L87 Difference]: Start difference. First operand 632 states and 1570 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-12-14 09:30:06,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:30:06,137 INFO L93 Difference]: Finished difference Result 759 states and 1889 transitions. [2022-12-14 09:30:06,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:30:06,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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 19 [2022-12-14 09:30:06,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:30:06,140 INFO L225 Difference]: With dead ends: 759 [2022-12-14 09:30:06,140 INFO L226 Difference]: Without dead ends: 759 [2022-12-14 09:30:06,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:30:06,140 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 83 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:30:06,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 0 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:30:06,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-12-14 09:30:06,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 626. [2022-12-14 09:30:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 621 states have (on average 2.499194847020934) internal successors, (1552), 625 states have internal predecessors, (1552), 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) [2022-12-14 09:30:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1552 transitions. [2022-12-14 09:30:06,153 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1552 transitions. Word has length 19 [2022-12-14 09:30:06,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:30:06,154 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 1552 transitions. [2022-12-14 09:30:06,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-12-14 09:30:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1552 transitions. [2022-12-14 09:30:06,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 09:30:06,155 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:30:06,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:30:06,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-14 09:30:06,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:06,356 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:30:06,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:30:06,357 INFO L85 PathProgramCache]: Analyzing trace with hash 716563554, now seen corresponding path program 1 times [2022-12-14 09:30:06,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:30:06,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437479606] [2022-12-14 09:30:06,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:30:06,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:06,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:30:06,362 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:30:06,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-14 09:30:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:30:06,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:30:06,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:30:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:30:06,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:30:06,460 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:30:06,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437479606] [2022-12-14 09:30:06,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437479606] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:30:06,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:30:06,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:30:06,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630663268] [2022-12-14 09:30:06,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:30:06,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:30:06,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:30:06,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:30:06,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:30:06,461 INFO L87 Difference]: Start difference. First operand 626 states and 1552 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-12-14 09:30:06,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:30:06,557 INFO L93 Difference]: Finished difference Result 826 states and 1981 transitions. [2022-12-14 09:30:06,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:30:06,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 21 [2022-12-14 09:30:06,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:30:06,559 INFO L225 Difference]: With dead ends: 826 [2022-12-14 09:30:06,559 INFO L226 Difference]: Without dead ends: 826 [2022-12-14 09:30:06,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:30:06,560 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:30:06,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:30:06,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2022-12-14 09:30:06,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 718. [2022-12-14 09:30:06,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 711 states have (on average 2.4472573839662446) internal successors, (1740), 717 states have internal predecessors, (1740), 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) [2022-12-14 09:30:06,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1740 transitions. [2022-12-14 09:30:06,573 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1740 transitions. Word has length 21 [2022-12-14 09:30:06,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:30:06,574 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 1740 transitions. [2022-12-14 09:30:06,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-12-14 09:30:06,574 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1740 transitions. [2022-12-14 09:30:06,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 09:30:06,575 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:30:06,575 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:30:06,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-14 09:30:06,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:06,776 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:30:06,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:30:06,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1559251707, now seen corresponding path program 1 times [2022-12-14 09:30:06,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:30:06,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145676150] [2022-12-14 09:30:06,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:30:06,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:06,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:30:06,781 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:30:06,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-14 09:30:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:30:06,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 09:30:06,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:30:07,021 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-12-14 09:30:07,174 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 7 [2022-12-14 09:30:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:30:07,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:30:07,188 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:30:07,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145676150] [2022-12-14 09:30:07,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145676150] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:30:07,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:30:07,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-14 09:30:07,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282122222] [2022-12-14 09:30:07,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:30:07,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 09:30:07,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:30:07,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 09:30:07,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-12-14 09:30:07,190 INFO L87 Difference]: Start difference. First operand 718 states and 1740 transitions. Second operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 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) [2022-12-14 09:30:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:30:08,497 INFO L93 Difference]: Finished difference Result 1015 states and 2417 transitions. [2022-12-14 09:30:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 09:30:08,497 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 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 21 [2022-12-14 09:30:08,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:30:08,500 INFO L225 Difference]: With dead ends: 1015 [2022-12-14 09:30:08,500 INFO L226 Difference]: Without dead ends: 1015 [2022-12-14 09:30:08,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2022-12-14 09:30:08,500 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 144 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 09:30:08,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 0 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 09:30:08,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2022-12-14 09:30:08,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 840. [2022-12-14 09:30:08,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 833 states have (on average 2.4717887154861944) internal successors, (2059), 839 states have internal predecessors, (2059), 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) [2022-12-14 09:30:08,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2059 transitions. [2022-12-14 09:30:08,510 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2059 transitions. Word has length 21 [2022-12-14 09:30:08,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:30:08,510 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 2059 transitions. [2022-12-14 09:30:08,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 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) [2022-12-14 09:30:08,511 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2059 transitions. [2022-12-14 09:30:08,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 09:30:08,511 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:30:08,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:30:08,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-12-14 09:30:08,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:08,712 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:30:08,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:30:08,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2131920739, now seen corresponding path program 2 times [2022-12-14 09:30:08,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:30:08,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901048162] [2022-12-14 09:30:08,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:30:08,715 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:08,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:30:08,718 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:30:08,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-14 09:30:08,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 09:30:08,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:30:08,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 09:30:08,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:30:08,863 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-12-14 09:30:08,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-12-14 09:30:08,994 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-12-14 09:30:09,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-14 09:30:09,242 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 7 [2022-12-14 09:30:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:30:09,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:30:09,258 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:30:09,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901048162] [2022-12-14 09:30:09,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901048162] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:30:09,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:30:09,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-14 09:30:09,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916676454] [2022-12-14 09:30:09,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:30:09,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 09:30:09,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:30:09,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 09:30:09,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-12-14 09:30:09,260 INFO L87 Difference]: Start difference. First operand 840 states and 2059 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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) [2022-12-14 09:30:10,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:30:10,343 INFO L93 Difference]: Finished difference Result 1091 states and 2646 transitions. [2022-12-14 09:30:10,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 09:30:10,344 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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 21 [2022-12-14 09:30:10,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:30:10,347 INFO L225 Difference]: With dead ends: 1091 [2022-12-14 09:30:10,348 INFO L226 Difference]: Without dead ends: 1091 [2022-12-14 09:30:10,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-12-14 09:30:10,348 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 105 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 09:30:10,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 0 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 09:30:10,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2022-12-14 09:30:10,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 867. [2022-12-14 09:30:10,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 860 states have (on average 2.474418604651163) internal successors, (2128), 866 states have internal predecessors, (2128), 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) [2022-12-14 09:30:10,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2128 transitions. [2022-12-14 09:30:10,363 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2128 transitions. Word has length 21 [2022-12-14 09:30:10,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:30:10,363 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 2128 transitions. [2022-12-14 09:30:10,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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) [2022-12-14 09:30:10,364 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2128 transitions. [2022-12-14 09:30:10,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 09:30:10,364 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:30:10,364 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:30:10,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-12-14 09:30:10,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:10,566 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:30:10,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:30:10,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1430171871, now seen corresponding path program 3 times [2022-12-14 09:30:10,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:30:10,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674236535] [2022-12-14 09:30:10,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:30:10,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:10,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:30:10,571 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:30:10,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-14 09:30:10,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 09:30:10,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:30:10,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 09:30:10,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:30:10,719 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-12-14 09:30:10,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-12-14 09:30:10,868 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 11 [2022-12-14 09:30:10,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 09:30:11,107 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 7 [2022-12-14 09:30:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:30:11,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:30:11,129 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:30:11,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674236535] [2022-12-14 09:30:11,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674236535] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:30:11,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:30:11,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-14 09:30:11,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922550513] [2022-12-14 09:30:11,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:30:11,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 09:30:11,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:30:11,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 09:30:11,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-12-14 09:30:11,130 INFO L87 Difference]: Start difference. First operand 867 states and 2128 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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) [2022-12-14 09:30:12,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:30:12,510 INFO L93 Difference]: Finished difference Result 1013 states and 2419 transitions. [2022-12-14 09:30:12,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 09:30:12,510 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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 21 [2022-12-14 09:30:12,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:30:12,513 INFO L225 Difference]: With dead ends: 1013 [2022-12-14 09:30:12,513 INFO L226 Difference]: Without dead ends: 1013 [2022-12-14 09:30:12,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-12-14 09:30:12,514 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 136 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 09:30:12,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 0 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 09:30:12,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-12-14 09:30:12,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 722. [2022-12-14 09:30:12,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 715 states have (on average 2.4405594405594404) internal successors, (1745), 721 states have internal predecessors, (1745), 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) [2022-12-14 09:30:12,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1745 transitions. [2022-12-14 09:30:12,526 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1745 transitions. Word has length 21 [2022-12-14 09:30:12,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:30:12,527 INFO L495 AbstractCegarLoop]: Abstraction has 722 states and 1745 transitions. [2022-12-14 09:30:12,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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) [2022-12-14 09:30:12,527 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1745 transitions. [2022-12-14 09:30:12,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 09:30:12,527 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:30:12,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:30:12,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-14 09:30:12,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:12,729 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:30:12,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:30:12,730 INFO L85 PathProgramCache]: Analyzing trace with hash -448782012, now seen corresponding path program 1 times [2022-12-14 09:30:12,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:30:12,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068304740] [2022-12-14 09:30:12,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:30:12,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:12,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:30:12,735 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:30:12,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-14 09:30:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:30:12,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:30:12,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:30:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:30:12,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:30:12,906 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:30:12,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068304740] [2022-12-14 09:30:12,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068304740] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:30:12,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:30:12,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:30:12,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488318220] [2022-12-14 09:30:12,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:30:12,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:30:12,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:30:12,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:30:12,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:30:12,908 INFO L87 Difference]: Start difference. First operand 722 states and 1745 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-12-14 09:30:12,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:30:12,978 INFO L93 Difference]: Finished difference Result 674 states and 1529 transitions. [2022-12-14 09:30:12,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:30:12,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 23 [2022-12-14 09:30:12,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:30:12,981 INFO L225 Difference]: With dead ends: 674 [2022-12-14 09:30:12,981 INFO L226 Difference]: Without dead ends: 674 [2022-12-14 09:30:12,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:30:12,981 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:30:12,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:30:12,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-12-14 09:30:12,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 674. [2022-12-14 09:30:12,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 667 states have (on average 2.292353823088456) internal successors, (1529), 673 states have internal predecessors, (1529), 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) [2022-12-14 09:30:12,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 1529 transitions. [2022-12-14 09:30:12,989 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 1529 transitions. Word has length 23 [2022-12-14 09:30:12,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:30:12,989 INFO L495 AbstractCegarLoop]: Abstraction has 674 states and 1529 transitions. [2022-12-14 09:30:12,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-12-14 09:30:12,989 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 1529 transitions. [2022-12-14 09:30:12,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 09:30:12,990 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:30:12,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:30:12,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-14 09:30:13,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:13,191 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:30:13,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:30:13,192 INFO L85 PathProgramCache]: Analyzing trace with hash 605736698, now seen corresponding path program 2 times [2022-12-14 09:30:13,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:30:13,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566999262] [2022-12-14 09:30:13,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:30:13,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:13,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:30:13,197 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:30:13,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-14 09:30:13,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 09:30:13,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:30:13,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:30:13,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:30:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:30:13,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:30:13,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:30:13,371 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:30:13,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566999262] [2022-12-14 09:30:13,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566999262] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:30:13,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [450097731] [2022-12-14 09:30:13,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:30:13,372 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:30:13,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:30:13,372 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:30:13,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-12-14 09:30:13,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 09:30:13,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:30:13,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:30:13,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:30:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:30:13,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:30:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:30:13,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [450097731] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:30:13,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906213618] [2022-12-14 09:30:13,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:30:13,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:30:13,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:30:13,598 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:30:13,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 09:30:13,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 09:30:13,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:30:13,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:30:13,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:30:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:30:13,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:30:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:30:13,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906213618] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:30:13,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:30:13,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2022-12-14 09:30:13,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893542364] [2022-12-14 09:30:13,711 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:30:13,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:30:13,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:30:13,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:30:13,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:30:13,712 INFO L87 Difference]: Start difference. First operand 674 states and 1529 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2022-12-14 09:30:13,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:30:13,936 INFO L93 Difference]: Finished difference Result 1052 states and 2287 transitions. [2022-12-14 09:30:13,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:30:13,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 23 [2022-12-14 09:30:13,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:30:13,940 INFO L225 Difference]: With dead ends: 1052 [2022-12-14 09:30:13,940 INFO L226 Difference]: Without dead ends: 1052 [2022-12-14 09:30:13,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:30:13,940 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:30:13,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:30:13,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-12-14 09:30:13,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1038. [2022-12-14 09:30:13,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1029 states have (on average 2.2118561710398446) internal successors, (2276), 1037 states have internal predecessors, (2276), 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) [2022-12-14 09:30:13,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 2276 transitions. [2022-12-14 09:30:13,952 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 2276 transitions. Word has length 23 [2022-12-14 09:30:13,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:30:13,952 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 2276 transitions. [2022-12-14 09:30:13,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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) [2022-12-14 09:30:13,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 2276 transitions. [2022-12-14 09:30:13,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 09:30:13,952 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:30:13,953 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:30:13,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 09:30:14,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-12-14 09:30:14,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-12-14 09:30:14,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:14,554 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-12-14 09:30:14,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:30:14,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1597933493, now seen corresponding path program 1 times [2022-12-14 09:30:14,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:30:14,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917827579] [2022-12-14 09:30:14,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:30:14,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:14,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:30:14,560 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 09:30:14,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-14 09:30:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 09:30:14,862 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 09:30:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 09:30:14,957 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2022-12-14 09:30:14,957 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 09:30:14,958 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2022-12-14 09:30:14,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2022-12-14 09:30:14,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2022-12-14 09:30:14,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2022-12-14 09:30:14,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2022-12-14 09:30:14,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2022-12-14 09:30:14,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2022-12-14 09:30:14,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2022-12-14 09:30:14,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2022-12-14 09:30:14,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2022-12-14 09:30:14,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2022-12-14 09:30:14,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2022-12-14 09:30:14,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2022-12-14 09:30:14,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2022-12-14 09:30:14,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2022-12-14 09:30:14,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2022-12-14 09:30:14,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2022-12-14 09:30:14,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2022-12-14 09:30:14,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2022-12-14 09:30:14,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2022-12-14 09:30:14,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2022-12-14 09:30:14,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2022-12-14 09:30:14,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2022-12-14 09:30:14,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-12-14 09:30:15,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 09:30:15,166 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:30:15,169 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-14 09:30:15,169 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 09:30:15,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 09:30:15 BasicIcfg [2022-12-14 09:30:15,197 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 09:30:15,197 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 09:30:15,197 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 09:30:15,197 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 09:30:15,198 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:29:42" (3/4) ... [2022-12-14 09:30:15,199 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-14 09:30:15,200 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 09:30:15,200 INFO L158 Benchmark]: Toolchain (without parser) took 34060.39ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 66.8MB in the beginning and 32.9MB in the end (delta: 33.9MB). Peak memory consumption was 55.4MB. Max. memory is 16.1GB. [2022-12-14 09:30:15,200 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 56.6MB. Free memory is still 34.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 09:30:15,200 INFO L158 Benchmark]: CACSL2BoogieTranslator took 511.34ms. Allocated memory is still 90.2MB. Free memory was 66.6MB in the beginning and 55.4MB in the end (delta: 11.2MB). Peak memory consumption was 22.4MB. Max. memory is 16.1GB. [2022-12-14 09:30:15,200 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.55ms. Allocated memory is still 90.2MB. Free memory was 55.4MB in the beginning and 52.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:30:15,200 INFO L158 Benchmark]: Boogie Preprocessor took 22.43ms. Allocated memory is still 90.2MB. Free memory was 52.9MB in the beginning and 50.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:30:15,201 INFO L158 Benchmark]: RCFGBuilder took 470.65ms. Allocated memory is still 90.2MB. Free memory was 50.8MB in the beginning and 59.2MB in the end (delta: -8.4MB). Peak memory consumption was 17.5MB. Max. memory is 16.1GB. [2022-12-14 09:30:15,201 INFO L158 Benchmark]: TraceAbstraction took 33013.76ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 58.7MB in the beginning and 33.7MB in the end (delta: 25.0MB). Peak memory consumption was 42.8MB. Max. memory is 16.1GB. [2022-12-14 09:30:15,201 INFO L158 Benchmark]: Witness Printer took 2.35ms. Allocated memory is still 109.1MB. Free memory was 33.7MB in the beginning and 32.9MB in the end (delta: 882.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:30:15,202 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 56.6MB. Free memory is still 34.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 511.34ms. Allocated memory is still 90.2MB. Free memory was 66.6MB in the beginning and 55.4MB in the end (delta: 11.2MB). Peak memory consumption was 22.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.55ms. Allocated memory is still 90.2MB. Free memory was 55.4MB in the beginning and 52.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.43ms. Allocated memory is still 90.2MB. Free memory was 52.9MB in the beginning and 50.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 470.65ms. Allocated memory is still 90.2MB. Free memory was 50.8MB in the beginning and 59.2MB in the end (delta: -8.4MB). Peak memory consumption was 17.5MB. Max. memory is 16.1GB. * TraceAbstraction took 33013.76ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 58.7MB in the beginning and 33.7MB in the end (delta: 25.0MB). Peak memory consumption was 42.8MB. Max. memory is 16.1GB. * Witness Printer took 2.35ms. Allocated memory is still 109.1MB. Free memory was 33.7MB in the beginning and 32.9MB in the end (delta: 882.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 9.2s, 188 PlacesBefore, 51 PlacesAfterwards, 191 TransitionsBefore, 49 TransitionsAfterwards, 10398 CoEnabledTransitionPairs, 6 FixpointIterations, 51 TrivialSequentialCompositions, 118 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 23 ConcurrentYvCompositions, 5 ChoiceCompositions, 197 TotalNumberOfCompositions, 14771 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 11321, independent: 11121, independent conditional: 0, independent unconditional: 11121, dependent: 200, dependent conditional: 0, dependent unconditional: 200, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 7349, independent: 7279, independent conditional: 0, independent unconditional: 7279, dependent: 70, dependent conditional: 0, dependent unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 7349, independent: 7260, independent conditional: 0, independent unconditional: 7260, dependent: 89, dependent conditional: 0, dependent unconditional: 89, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 89, independent: 19, independent conditional: 0, independent unconditional: 19, dependent: 70, dependent conditional: 0, dependent unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 290, independent: 24, independent conditional: 0, independent unconditional: 24, dependent: 265, dependent conditional: 0, dependent unconditional: 265, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 11321, independent: 3842, independent conditional: 0, independent unconditional: 3842, dependent: 130, dependent conditional: 0, dependent unconditional: 130, unknown: 7349, unknown conditional: 0, unknown unconditional: 7349] , Statistics on independence cache: Total cache size (in pairs): 382, Positive cache size: 355, Positive conditional cache size: 0, Positive unconditional cache size: 355, Negative cache size: 27, Negative conditional cache size: 0, Negative unconditional cache size: 27, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 940]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 940. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(400)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1019] 0 pthread_t id1, id2; [L1021] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={5:0}, id2={7:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=0, top=0] [L988] 1 int i; [L989] 1 unsigned int tmp; [L990] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L990] COND TRUE 1 i<(400) [L993] 1 tmp = __VERIFIER_nondet_uint() [L994] CALL 1 assume_abort_if_not(tmp < (400)) [L23] COND FALSE 1 !(!cond) [L994] RET 1 assume_abort_if_not(tmp < (400)) [L995] CALL, EXPR 1 push(arr,tmp) [L960] COND FALSE 1 !(top==(400)) VAL [\old(x)=0, arr={3:0}, flag=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=0] [L967] CALL, EXPR 1 get_top() [L952] 1 return top; VAL [\result=0, arr={3:0}, flag=0, m={4:0}, top=0] [L1022] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={5:0}, id2={7:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=1, top=0] [L1004] 2 int i; [L1005] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L967] RET, EXPR 1 get_top() [L967] 1 stack[get_top()] = x VAL [\old(x)=0, arr={3:0}, flag=0, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=0] [L968] CALL 1 inc_top() [L944] 1 top++ [L968] RET 1 inc_top() [L970] 1 return 0; [L995] RET, EXPR 1 push(arr,tmp) [L995] COND FALSE 1 !(push(arr,tmp)==(-1)) [L997] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L990] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=0, top=1] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND FALSE 2 !(get_top()==0) [L981] CALL 2 dec_top() [L948] 2 top-- [L981] RET 2 dec_top() [L982] CALL, EXPR 2 get_top() [L952] 2 return top; [L982] RET, EXPR 2 get_top() [L982] EXPR 2 stack[get_top()] [L982] 2 return stack[get_top()]; [L1010] RET, EXPR 2 pop(arr) [L1010] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1005] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND TRUE 2 get_top()==0 [L977] 2 return (-2); [L1010] RET, EXPR 2 pop(arr) [L1010] COND TRUE 2 !(pop(arr)!=(-2)) [L1011] CALL 2 error() [L940] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 940]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 299 locations, 23 error locations. Started 1 CEGAR loops. OverallTime: 32.9s, OverallIterations: 23, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 9.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 9.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1481 SdHoareTripleChecker+Valid, 7.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1481 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 6.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 53 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6567 IncrementalHoareTripleChecker+Invalid, 6620 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 53 mSolverCounterUnsat, 0 mSDtfsCounter, 6567 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 561 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1722occurred in iteration=13, InterpolantAutomatonStates: 145, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 22 MinimizatonAttempts, 2490 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 406 NumberOfCodeBlocks, 391 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 498 ConstructedInterpolants, 10 QuantifiedInterpolants, 4100 SizeOfPredicates, 140 NumberOfNonLiveVariables, 2886 ConjunctsInSsa, 270 ConjunctsInUnsatCore, 37 InterpolantComputations, 19 PerfectInterpolantSequences, 15/51 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-14 09:30:15,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21e7e49f-bfb4-409b-99d3-937a280e7656/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample