./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/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_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e --- 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 09:55:44,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:55:44,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:55:44,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:55:44,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:55:44,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:55:44,867 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:55:44,869 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:55:44,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:55:44,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:55:44,875 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:55:44,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:55:44,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:55:44,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:55:44,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:55:44,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:55:44,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:55:44,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:55:44,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:55:44,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:55:44,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:55:44,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:55:44,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:55:44,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:55:44,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:55:44,897 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:55:44,897 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:55:44,898 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:55:44,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:55:44,899 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:55:44,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:55:44,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:55:44,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:55:44,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:55:44,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:55:44,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:55:44,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:55:44,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:55:44,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:55:44,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:55:44,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:55:44,904 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:55:44,919 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:55:44,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:55:44,919 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:55:44,919 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:55:44,920 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:55:44,920 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:55:44,920 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:55:44,920 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:55:44,920 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:55:44,920 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:55:44,921 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:55:44,921 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:55:44,921 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:55:44,921 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:55:44,921 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:55:44,921 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:55:44,922 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:55:44,922 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:55:44,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:55:44,923 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:55:44,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:55:44,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:55:44,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:55:44,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:55:44,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:55:44,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:55:44,924 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:55:44,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:55:44,924 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:55:44,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:55:44,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:55:44,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:55:44,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:55:44,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:55:44,925 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:55:44,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:55:44,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:55:44,925 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:55:44,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:55:44,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:55:44,926 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:55:44,926 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_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c642b478618f67be61772197bb614a61e988cb880f57faee5dd0470714f61e7e [2022-12-14 09:55:45,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:55:45,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:55:45,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:55:45,135 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:55:45,135 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:55:45,136 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-12-14 09:55:47,727 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:55:47,883 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:55:47,883 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2022-12-14 09:55:47,889 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/data/f9935470f/a03b0de119ae4fdb9c1b650e7a664deb/FLAGdded38e7a [2022-12-14 09:55:47,900 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/data/f9935470f/a03b0de119ae4fdb9c1b650e7a664deb [2022-12-14 09:55:47,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:55:47,903 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:55:47,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:55:47,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:55:47,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:55:47,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:55:47" (1/1) ... [2022-12-14 09:55:47,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@723865fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:55:47, skipping insertion in model container [2022-12-14 09:55:47,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:55:47" (1/1) ... [2022-12-14 09:55:47,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:55:47,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:55:48,053 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 09:55:48,054 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 09:55:48,054 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 09:55:48,054 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 09:55:48,057 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 09:55:48,058 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 09:55:48,058 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 09:55:48,058 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 09:55:48,062 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_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-12-14 09:55:48,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:55:48,078 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:55:48,089 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 09:55:48,090 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 09:55:48,090 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 09:55:48,090 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 09:55:48,091 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 09:55:48,092 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 09:55:48,092 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 09:55:48,092 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 09:55:48,095 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_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2428,2441] [2022-12-14 09:55:48,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:55:48,109 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:55:48,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:55:48 WrapperNode [2022-12-14 09:55:48,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:55:48,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:55:48,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:55:48,111 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:55:48,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:55:48" (1/1) ... [2022-12-14 09:55:48,122 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:55:48" (1/1) ... [2022-12-14 09:55:48,138 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 144 [2022-12-14 09:55:48,138 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:55:48,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:55:48,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:55:48,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:55:48,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:55:48" (1/1) ... [2022-12-14 09:55:48,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:55:48" (1/1) ... [2022-12-14 09:55:48,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:55:48" (1/1) ... [2022-12-14 09:55:48,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:55:48" (1/1) ... [2022-12-14 09:55:48,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:55:48" (1/1) ... [2022-12-14 09:55:48,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:55:48" (1/1) ... [2022-12-14 09:55:48,157 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:55:48" (1/1) ... [2022-12-14 09:55:48,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:55:48" (1/1) ... [2022-12-14 09:55:48,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:55:48,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:55:48,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:55:48,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:55:48,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:55:48" (1/1) ... [2022-12-14 09:55:48,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:55:48,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:55:48,184 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:55:48,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:55:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:55:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 09:55:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 09:55:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 09:55:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 09:55:48,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 09:55:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 09:55:48,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 09:55:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:55:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 09:55:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 09:55:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 09:55:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:55:48,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:55:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:55:48,212 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 09:55:48,290 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:55:48,292 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:55:48,493 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:55:48,567 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:55:48,567 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 09:55:48,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:55:48 BoogieIcfgContainer [2022-12-14 09:55:48,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:55:48,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:55:48,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:55:48,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:55:48,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:55:47" (1/3) ... [2022-12-14 09:55:48,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122d6c6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:55:48, skipping insertion in model container [2022-12-14 09:55:48,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:55:48" (2/3) ... [2022-12-14 09:55:48,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122d6c6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:55:48, skipping insertion in model container [2022-12-14 09:55:48,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:55:48" (3/3) ... [2022-12-14 09:55:48,576 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2022-12-14 09:55:48,582 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-14 09:55:48,590 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:55:48,590 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 09:55:48,590 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 09:55:48,629 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-14 09:55:48,654 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 09:55:48,665 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 119 transitions, 254 flow [2022-12-14 09:55:48,667 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 119 transitions, 254 flow [2022-12-14 09:55:48,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 254 flow [2022-12-14 09:55:48,710 INFO L130 PetriNetUnfolder]: 9/117 cut-off events. [2022-12-14 09:55:48,710 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 09:55:48,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 9/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2022-12-14 09:55:48,715 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2022-12-14 09:55:51,725 INFO L134 LiptonReduction]: Checked pairs total: 794 [2022-12-14 09:55:51,725 INFO L136 LiptonReduction]: Total number of compositions: 115 [2022-12-14 09:55:51,731 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 26 places, 22 transitions, 60 flow [2022-12-14 09:55:51,744 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 53 states, 52 states have (on average 2.269230769230769) internal successors, (118), 52 states have internal predecessors, (118), 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 09:55:51,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:55:51,763 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4ad1668d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:55:51,763 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-14 09:55:51,765 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 52 states have (on average 2.269230769230769) internal successors, (118), 52 states have internal predecessors, (118), 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 09:55:51,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 09:55:51,769 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:51,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:55:51,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-14 09:55:51,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:51,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1576703872, now seen corresponding path program 1 times [2022-12-14 09:55:51,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:55:51,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953460657] [2022-12-14 09:55:51,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:51,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:55:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:52,088 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 09:55:52,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:55:52,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953460657] [2022-12-14 09:55:52,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953460657] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:55:52,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:55:52,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:55:52,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54755844] [2022-12-14 09:55:52,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:55:52,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:55:52,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:55:52,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:55:52,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:55:52,119 INFO L87 Difference]: Start difference. First operand has 53 states, 52 states have (on average 2.269230769230769) internal successors, (118), 52 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:52,170 INFO L93 Difference]: Finished difference Result 98 states and 222 transitions. [2022-12-14 09:55:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:55:52,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 09:55:52,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:52,181 INFO L225 Difference]: With dead ends: 98 [2022-12-14 09:55:52,181 INFO L226 Difference]: Without dead ends: 93 [2022-12-14 09:55:52,182 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 09:55:52,185 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:52,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 4 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:55:52,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-12-14 09:55:52,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 75. [2022-12-14 09:55:52,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 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 09:55:52,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 169 transitions. [2022-12-14 09:55:52,217 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 169 transitions. Word has length 14 [2022-12-14 09:55:52,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:52,217 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 169 transitions. [2022-12-14 09:55:52,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:55:52,217 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 169 transitions. [2022-12-14 09:55:52,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 09:55:52,218 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:52,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:55:52,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:55:52,218 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-14 09:55:52,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:52,219 INFO L85 PathProgramCache]: Analyzing trace with hash -880990884, now seen corresponding path program 1 times [2022-12-14 09:55:52,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:55:52,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354708772] [2022-12-14 09:55:52,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:52,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:55:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:52,339 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 09:55:52,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:55:52,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354708772] [2022-12-14 09:55:52,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354708772] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:55:52,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:55:52,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:55:52,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944653289] [2022-12-14 09:55:52,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:55:52,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:55:52,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:55:52,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:55:52,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:55:52,342 INFO L87 Difference]: Start difference. First operand 75 states and 169 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 09:55:52,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:52,412 INFO L93 Difference]: Finished difference Result 129 states and 277 transitions. [2022-12-14 09:55:52,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:55:52,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 16 [2022-12-14 09:55:52,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:52,414 INFO L225 Difference]: With dead ends: 129 [2022-12-14 09:55:52,414 INFO L226 Difference]: Without dead ends: 125 [2022-12-14 09:55:52,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:55:52,416 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:52,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 8 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:55:52,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-12-14 09:55:52,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 101. [2022-12-14 09:55:52,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.3) internal successors, (230), 100 states have internal predecessors, (230), 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 09:55:52,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 230 transitions. [2022-12-14 09:55:52,423 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 230 transitions. Word has length 16 [2022-12-14 09:55:52,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:52,424 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 230 transitions. [2022-12-14 09:55:52,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 09:55:52,424 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 230 transitions. [2022-12-14 09:55:52,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 09:55:52,425 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:52,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:55:52,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:55:52,426 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-14 09:55:52,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:52,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1887901360, now seen corresponding path program 1 times [2022-12-14 09:55:52,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:55:52,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647018807] [2022-12-14 09:55:52,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:52,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:55:52,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:52,496 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 09:55:52,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:55:52,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647018807] [2022-12-14 09:55:52,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647018807] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:55:52,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:55:52,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:55:52,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635113092] [2022-12-14 09:55:52,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:55:52,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:55:52,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:55:52,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:55:52,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:55:52,499 INFO L87 Difference]: Start difference. First operand 101 states and 230 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 09:55:52,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:52,553 INFO L93 Difference]: Finished difference Result 99 states and 208 transitions. [2022-12-14 09:55:52,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:55:52,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 16 [2022-12-14 09:55:52,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:52,555 INFO L225 Difference]: With dead ends: 99 [2022-12-14 09:55:52,555 INFO L226 Difference]: Without dead ends: 76 [2022-12-14 09:55:52,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:55:52,556 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:52,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 8 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:55:52,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-12-14 09:55:52,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-12-14 09:55:52,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2666666666666666) internal successors, (170), 75 states have internal predecessors, (170), 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 09:55:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 170 transitions. [2022-12-14 09:55:52,561 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 170 transitions. Word has length 16 [2022-12-14 09:55:52,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:52,561 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 170 transitions. [2022-12-14 09:55:52,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 09:55:52,562 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 170 transitions. [2022-12-14 09:55:52,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 09:55:52,563 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:52,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:55:52,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 09:55:52,563 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-14 09:55:52,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:52,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1907980746, now seen corresponding path program 1 times [2022-12-14 09:55:52,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:55:52,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144841611] [2022-12-14 09:55:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:52,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:55:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:52,626 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 09:55:52,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:55:52,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144841611] [2022-12-14 09:55:52,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144841611] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:55:52,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537058979] [2022-12-14 09:55:52,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:52,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:52,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:55:52,629 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:55:52,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:55:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:52,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 09:55:52,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:52,750 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 09:55:52,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:55:52,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537058979] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 09:55:52,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:55:52,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-12-14 09:55:52,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483005800] [2022-12-14 09:55:52,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:55:52,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:55:52,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:55:52,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:55:52,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:55:52,784 INFO L87 Difference]: Start difference. First operand 76 states and 170 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 09:55:52,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:52,829 INFO L93 Difference]: Finished difference Result 80 states and 179 transitions. [2022-12-14 09:55:52,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:55:52,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2022-12-14 09:55:52,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:52,831 INFO L225 Difference]: With dead ends: 80 [2022-12-14 09:55:52,831 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 09:55:52,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:55:52,832 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:52,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 4 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:55:52,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 09:55:52,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2022-12-14 09:55:52,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.2698412698412698) internal successors, (143), 63 states have internal predecessors, (143), 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 09:55:52,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 143 transitions. [2022-12-14 09:55:52,838 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 143 transitions. Word has length 17 [2022-12-14 09:55:52,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:52,839 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 143 transitions. [2022-12-14 09:55:52,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 09:55:52,839 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 143 transitions. [2022-12-14 09:55:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 09:55:52,840 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:52,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:55:52,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:55:53,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:53,047 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-14 09:55:53,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:53,048 INFO L85 PathProgramCache]: Analyzing trace with hash 860911498, now seen corresponding path program 1 times [2022-12-14 09:55:53,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:55:53,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783155282] [2022-12-14 09:55:53,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:53,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:55:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:53,118 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 09:55:53,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:55:53,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783155282] [2022-12-14 09:55:53,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783155282] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:55:53,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702304407] [2022-12-14 09:55:53,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:53,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:53,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:55:53,120 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:55:53,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:55:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:55:53,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 09:55:53,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:55:53,217 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 09:55:53,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:55:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:55:53,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702304407] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 09:55:53,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:55:53,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-12-14 09:55:53,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810814343] [2022-12-14 09:55:53,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:55:53,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:55:53,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:55:53,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:55:53,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:55:53,245 INFO L87 Difference]: Start difference. First operand 64 states and 143 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 09:55:53,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:55:53,287 INFO L93 Difference]: Finished difference Result 76 states and 172 transitions. [2022-12-14 09:55:53,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:55:53,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2022-12-14 09:55:53,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:55:53,289 INFO L225 Difference]: With dead ends: 76 [2022-12-14 09:55:53,289 INFO L226 Difference]: Without dead ends: 76 [2022-12-14 09:55:53,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:55:53,290 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:55:53,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 4 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:55:53,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-12-14 09:55:53,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-12-14 09:55:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2933333333333334) internal successors, (172), 75 states have internal predecessors, (172), 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 09:55:53,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 172 transitions. [2022-12-14 09:55:53,295 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 172 transitions. Word has length 17 [2022-12-14 09:55:53,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:55:53,296 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 172 transitions. [2022-12-14 09:55:53,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 09:55:53,296 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 172 transitions. [2022-12-14 09:55:53,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 09:55:53,296 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:55:53,296 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 09:55:53,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:55:53,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:55:53,497 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-14 09:55:53,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:55:53,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1476778560, now seen corresponding path program 1 times [2022-12-14 09:55:53,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:55:53,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470193235] [2022-12-14 09:55:53,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:55:53,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:55:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 09:55:53,528 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 09:55:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 09:55:53,565 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 09:55:53,565 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 09:55:53,566 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-14 09:55:53,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-14 09:55:53,567 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-14 09:55:53,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 09:55:53,569 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-12-14 09:55:53,572 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-14 09:55:53,572 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 09:55:53,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 09:55:53 BasicIcfg [2022-12-14 09:55:53,598 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 09:55:53,599 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 09:55:53,599 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 09:55:53,599 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 09:55:53,599 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:55:48" (3/4) ... [2022-12-14 09:55:53,601 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 09:55:53,634 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52aabcce-f2f9-4e0a-b69c-f81dfbfd9094/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 09:55:53,634 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 09:55:53,635 INFO L158 Benchmark]: Toolchain (without parser) took 5731.62ms. Allocated memory was 109.1MB in the beginning and 155.2MB in the end (delta: 46.1MB). Free memory was 68.7MB in the beginning and 61.3MB in the end (delta: 7.4MB). Peak memory consumption was 54.8MB. Max. memory is 16.1GB. [2022-12-14 09:55:53,635 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 109.1MB. Free memory is still 83.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 09:55:53,635 INFO L158 Benchmark]: CACSL2BoogieTranslator took 206.08ms. Allocated memory is still 109.1MB. Free memory was 68.4MB in the beginning and 56.1MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 09:55:53,636 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.92ms. Allocated memory is still 109.1MB. Free memory was 56.1MB in the beginning and 54.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:55:53,636 INFO L158 Benchmark]: Boogie Preprocessor took 20.54ms. Allocated memory is still 109.1MB. Free memory was 54.1MB in the beginning and 52.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:55:53,636 INFO L158 Benchmark]: RCFGBuilder took 409.64ms. Allocated memory was 109.1MB in the beginning and 155.2MB in the end (delta: 46.1MB). Free memory was 52.3MB in the beginning and 111.4MB in the end (delta: -59.1MB). Peak memory consumption was 17.9MB. Max. memory is 16.1GB. [2022-12-14 09:55:53,637 INFO L158 Benchmark]: TraceAbstraction took 5027.36ms. Allocated memory is still 155.2MB. Free memory was 110.8MB in the beginning and 68.7MB in the end (delta: 42.1MB). Peak memory consumption was 43.2MB. Max. memory is 16.1GB. [2022-12-14 09:55:53,637 INFO L158 Benchmark]: Witness Printer took 35.24ms. Allocated memory is still 155.2MB. Free memory was 68.7MB in the beginning and 61.3MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-12-14 09:55:53,639 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 109.1MB. Free memory is still 83.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 206.08ms. Allocated memory is still 109.1MB. Free memory was 68.4MB in the beginning and 56.1MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.92ms. Allocated memory is still 109.1MB. Free memory was 56.1MB in the beginning and 54.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.54ms. Allocated memory is still 109.1MB. Free memory was 54.1MB in the beginning and 52.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 409.64ms. Allocated memory was 109.1MB in the beginning and 155.2MB in the end (delta: 46.1MB). Free memory was 52.3MB in the beginning and 111.4MB in the end (delta: -59.1MB). Peak memory consumption was 17.9MB. Max. memory is 16.1GB. * TraceAbstraction took 5027.36ms. Allocated memory is still 155.2MB. Free memory was 110.8MB in the beginning and 68.7MB in the end (delta: 42.1MB). Peak memory consumption was 43.2MB. Max. memory is 16.1GB. * Witness Printer took 35.24ms. Allocated memory is still 155.2MB. Free memory was 68.7MB in the beginning and 61.3MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.1s, 117 PlacesBefore, 26 PlacesAfterwards, 119 TransitionsBefore, 22 TransitionsAfterwards, 572 CoEnabledTransitionPairs, 6 FixpointIterations, 77 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 115 TotalNumberOfCompositions, 794 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 693, independent: 657, independent conditional: 0, independent unconditional: 657, dependent: 36, dependent conditional: 0, dependent unconditional: 36, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 386, independent: 374, independent conditional: 0, independent unconditional: 374, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 386, independent: 374, independent conditional: 0, independent unconditional: 374, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 12, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 34, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 34, dependent conditional: 0, dependent unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 693, independent: 283, independent conditional: 0, independent unconditional: 283, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 386, unknown conditional: 0, unknown unconditional: 386] , Statistics on independence cache: Total cache size (in pairs): 48, Positive cache size: 43, Positive conditional cache size: 0, Positive unconditional cache size: 43, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, 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 - CounterExampleResult [Line: 87]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L41] 0 int* A; [L42] 0 int counter, N; [L75] 0 pthread_t t1, t2; [L77] 0 N = __VERIFIER_nondet_int() [L78] CALL, EXPR 0 create_fresh_int_array(N) [L93] CALL 0 assume_abort_if_not(size >= 0) [L38] COND FALSE 0 !(!cond) [L93] RET 0 assume_abort_if_not(size >= 0) [L94] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) [L94] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L96] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L97] 0 int i = 0; VAL [\old(size)=1, A={0:0}, arr={-2:0}, counter=0, i=0, N=1, size=1] [L97] COND TRUE 0 i < size [L98] 0 arr[i] = __VERIFIER_nondet_int() [L97] 0 i++ VAL [\old(size)=1, A={0:0}, arr={-2:0}, counter=0, i=1, N=1, size=1] [L97] COND FALSE 0 !(i < size) [L100] 0 return arr; [L78] RET, EXPR 0 create_fresh_int_array(N) [L78] 0 A = create_fresh_int_array(N) [L81] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={-2:0}, counter=0, N=1, pthread_create(&t1, 0, thread1, 0)=7, t1={5:0}, t2={3:0}] [L82] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={-2:0}, counter=0, N=1, pthread_create(&t2, 0, thread2, 0)=8, t1={5:0}, t2={3:0}] [L83] 0 \read(t1) VAL [\read(t1)=7, A={-2:0}, counter=0, N=1, t1={5:0}, t2={3:0}] [L62] 2 int i=0; VAL [A={-2:0}, counter=0, i=0, N=1] [L49] 1 int i=0; VAL [A={-2:0}, counter=0, i=0, N=1] [L49] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L38] COND FALSE 1 !(!cond) [L110] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 1 !(!cond) [L111] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 1 return a + b; [L51] RET, EXPR 1 plus(counter, A[i]) [L51] 1 int tmp = plus(counter, A[i]); [L62] COND TRUE 2 i= b - 2147483648) [L38] COND FALSE 2 !(!cond) [L104] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 2 !(!cond) [L105] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 2 return a - b; [L64] RET, EXPR 2 minus(counter, A[i]) [L64] 2 int tmp = minus(counter, A[i]); [L67] 2 counter = tmp [L62] 2 i++ VAL [A={-2:0}, counter=1, i=1, N=1, tmp=1] [L62] COND FALSE 2 !(i