./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_2cc57dae-8cc8-46ad-999c-14ce570e6b0b/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc57dae-8cc8-46ad-999c-14ce570e6b0b/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc57dae-8cc8-46ad-999c-14ce570e6b0b/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc57dae-8cc8-46ad-999c-14ce570e6b0b/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc57dae-8cc8-46ad-999c-14ce570e6b0b/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc57dae-8cc8-46ad-999c-14ce570e6b0b/bin/utaipan-Xvt2sAort0 --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 33fa46fe030c661ecf8ddae0fe7d2b7598ab4fcf90a09fe31211d00189cd239f --- 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-e04fb08 [2022-11-16 16:08:33,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:08:33,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:08:33,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:08:33,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:08:33,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:08:33,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:08:33,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:08:33,586 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:08:33,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:08:33,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:08:33,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:08:33,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:08:33,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:08:33,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:08:33,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:08:33,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:08:33,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:08:33,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:08:33,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:08:33,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:08:33,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:08:33,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:08:33,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:08:33,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:08:33,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:08:33,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:08:33,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:08:33,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:08:33,623 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:08:33,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:08:33,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:08:33,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:08:33,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:08:33,629 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:08:33,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:08:33,630 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:08:33,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:08:33,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:08:33,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:08:33,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:08:33,635 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc57dae-8cc8-46ad-999c-14ce570e6b0b/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 16:08:33,667 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:08:33,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:08:33,668 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:08:33,669 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:08:33,670 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:08:33,670 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:08:33,670 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:08:33,671 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:08:33,671 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:08:33,672 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 16:08:33,672 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:08:33,672 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:08:33,673 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 16:08:33,673 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 16:08:33,673 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:08:33,674 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 16:08:33,674 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 16:08:33,675 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 16:08:33,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:08:33,676 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 16:08:33,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 16:08:33,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 16:08:33,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:08:33,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 16:08:33,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:08:33,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 16:08:33,678 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 16:08:33,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 16:08:33,679 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:08:33,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 16:08:33,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:08:33,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:08:33,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:08:33,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:08:33,681 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 16:08:33,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:08:33,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 16:08:33,682 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 16:08:33,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 16:08:33,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 16:08:33,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:08:33,683 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_2cc57dae-8cc8-46ad-999c-14ce570e6b0b/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc57dae-8cc8-46ad-999c-14ce570e6b0b/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33fa46fe030c661ecf8ddae0fe7d2b7598ab4fcf90a09fe31211d00189cd239f [2022-11-16 16:08:34,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:08:34,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:08:34,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:08:34,075 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:08:34,077 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:08:34,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc57dae-8cc8-46ad-999c-14ce570e6b0b/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2022-11-16 16:08:34,198 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc57dae-8cc8-46ad-999c-14ce570e6b0b/bin/utaipan-Xvt2sAort0/data/9899c053c/beb32d8d1ffa4370adaf418687f16832/FLAG51b0c0848 [2022-11-16 16:08:34,967 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:08:34,967 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc57dae-8cc8-46ad-999c-14ce570e6b0b/sv-benchmarks/c/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2022-11-16 16:08:35,005 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc57dae-8cc8-46ad-999c-14ce570e6b0b/bin/utaipan-Xvt2sAort0/data/9899c053c/beb32d8d1ffa4370adaf418687f16832/FLAG51b0c0848 [2022-11-16 16:08:35,236 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc57dae-8cc8-46ad-999c-14ce570e6b0b/bin/utaipan-Xvt2sAort0/data/9899c053c/beb32d8d1ffa4370adaf418687f16832 [2022-11-16 16:08:35,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:08:35,241 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:08:35,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:08:35,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:08:35,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:08:35,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:08:35" (1/1) ... [2022-11-16 16:08:35,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e384cd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:35, skipping insertion in model container [2022-11-16 16:08:35,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:08:35" (1/1) ... [2022-11-16 16:08:35,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:08:35,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:08:35,589 WARN L229 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_2cc57dae-8cc8-46ad-999c-14ce570e6b0b/sv-benchmarks/c/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2022-11-16 16:08:35,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:08:35,897 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 16:08:35,922 WARN L229 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_2cc57dae-8cc8-46ad-999c-14ce570e6b0b/sv-benchmarks/c/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2022-11-16 16:08:35,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:08:36,040 INFO L208 MainTranslator]: Completed translation [2022-11-16 16:08:36,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:36 WrapperNode [2022-11-16 16:08:36,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:08:36,043 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 16:08:36,043 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 16:08:36,043 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 16:08:36,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:36" (1/1) ... [2022-11-16 16:08:36,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:36" (1/1) ... [2022-11-16 16:08:36,128 INFO L138 Inliner]: procedures = 177, calls = 66, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 85 [2022-11-16 16:08:36,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 16:08:36,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 16:08:36,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 16:08:36,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 16:08:36,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:36" (1/1) ... [2022-11-16 16:08:36,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:36" (1/1) ... [2022-11-16 16:08:36,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:36" (1/1) ... [2022-11-16 16:08:36,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:36" (1/1) ... [2022-11-16 16:08:36,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:36" (1/1) ... [2022-11-16 16:08:36,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:36" (1/1) ... [2022-11-16 16:08:36,173 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:36" (1/1) ... [2022-11-16 16:08:36,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:36" (1/1) ... [2022-11-16 16:08:36,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 16:08:36,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 16:08:36,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 16:08:36,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 16:08:36,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:36" (1/1) ... [2022-11-16 16:08:36,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:08:36,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc57dae-8cc8-46ad-999c-14ce570e6b0b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:08:36,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc57dae-8cc8-46ad-999c-14ce570e6b0b/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 16:08:36,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc57dae-8cc8-46ad-999c-14ce570e6b0b/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 16:08:36,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 16:08:36,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 16:08:36,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 16:08:36,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 16:08:36,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 16:08:36,297 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2022-11-16 16:08:36,297 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2022-11-16 16:08:36,297 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2022-11-16 16:08:36,298 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2022-11-16 16:08:36,298 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2022-11-16 16:08:36,298 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2022-11-16 16:08:36,298 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2022-11-16 16:08:36,299 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2022-11-16 16:08:36,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 16:08:36,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 16:08:36,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 16:08:36,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 16:08:36,303 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 16:08:36,557 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 16:08:36,559 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 16:08:36,829 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 16:08:36,839 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 16:08:36,839 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-16 16:08:36,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:08:36 BoogieIcfgContainer [2022-11-16 16:08:36,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 16:08:36,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 16:08:36,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 16:08:36,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 16:08:36,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 04:08:35" (1/3) ... [2022-11-16 16:08:36,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8441c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:08:36, skipping insertion in model container [2022-11-16 16:08:36,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:08:36" (2/3) ... [2022-11-16 16:08:36,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8441c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:08:36, skipping insertion in model container [2022-11-16 16:08:36,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:08:36" (3/3) ... [2022-11-16 16:08:36,867 INFO L112 eAbstractionObserver]: Analyzing ICFG thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2022-11-16 16:08:36,890 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 16:08:36,906 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 16:08:36,907 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 16:08:36,907 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 16:08:37,072 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 16:08:37,126 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 16:08:37,149 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 111 transitions, 242 flow [2022-11-16 16:08:37,161 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 111 transitions, 242 flow [2022-11-16 16:08:37,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 111 transitions, 242 flow [2022-11-16 16:08:37,299 INFO L130 PetriNetUnfolder]: 2/107 cut-off events. [2022-11-16 16:08:37,300 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 16:08:37,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 107 events. 2/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-11-16 16:08:37,312 INFO L119 LiptonReduction]: Number of co-enabled transitions 2568 [2022-11-16 16:08:42,086 INFO L134 LiptonReduction]: Checked pairs total: 5171 [2022-11-16 16:08:42,086 INFO L136 LiptonReduction]: Total number of compositions: 94 [2022-11-16 16:08:42,097 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 27 transitions, 74 flow [2022-11-16 16:08:42,208 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 938 states, 937 states have (on average 3.551760939167556) internal successors, (3328), 937 states have internal predecessors, (3328), 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) [2022-11-16 16:08:42,231 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 16:08:42,238 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;@6cd4081a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 16:08:42,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-16 16:08:42,244 INFO L276 IsEmpty]: Start isEmpty. Operand has 938 states, 937 states have (on average 3.551760939167556) internal successors, (3328), 937 states have internal predecessors, (3328), 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) [2022-11-16 16:08:42,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:08:42,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:42,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:42,255 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 16:08:42,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:42,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1871028186, now seen corresponding path program 1 times [2022-11-16 16:08:42,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:42,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372543238] [2022-11-16 16:08:42,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:42,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:43,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:43,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372543238] [2022-11-16 16:08:43,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372543238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:08:43,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:08:43,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:08:43,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396800932] [2022-11-16 16:08:43,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:08:43,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:08:43,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:43,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:08:43,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:08:43,127 INFO L87 Difference]: Start difference. First operand has 938 states, 937 states have (on average 3.551760939167556) internal successors, (3328), 937 states have internal predecessors, (3328), 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 5.0) internal successors, (10), 2 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) [2022-11-16 16:08:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:43,272 INFO L93 Difference]: Finished difference Result 937 states and 3323 transitions. [2022-11-16 16:08:43,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:08:43,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 [2022-11-16 16:08:43,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:43,315 INFO L225 Difference]: With dead ends: 937 [2022-11-16 16:08:43,316 INFO L226 Difference]: Without dead ends: 937 [2022-11-16 16:08:43,317 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 [2022-11-16 16:08:43,325 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:43,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:08:43,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-11-16 16:08:43,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 937. [2022-11-16 16:08:43,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.550213675213675) internal successors, (3323), 936 states have internal predecessors, (3323), 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) [2022-11-16 16:08:43,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3323 transitions. [2022-11-16 16:08:43,473 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3323 transitions. Word has length 10 [2022-11-16 16:08:43,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:43,475 INFO L495 AbstractCegarLoop]: Abstraction has 937 states and 3323 transitions. [2022-11-16 16:08:43,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-16 16:08:43,480 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3323 transitions. [2022-11-16 16:08:43,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:08:43,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:43,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:43,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 16:08:43,490 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 16:08:43,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:43,491 INFO L85 PathProgramCache]: Analyzing trace with hash 912609217, now seen corresponding path program 1 times [2022-11-16 16:08:43,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:43,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882625040] [2022-11-16 16:08:43,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:43,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:43,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:43,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882625040] [2022-11-16 16:08:43,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882625040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:08:43,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:08:43,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:08:43,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991131699] [2022-11-16 16:08:43,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:08:43,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:08:43,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:43,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:08:43,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:08:43,801 INFO L87 Difference]: Start difference. First operand 937 states and 3323 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:08:43,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:43,887 INFO L93 Difference]: Finished difference Result 874 states and 3056 transitions. [2022-11-16 16:08:43,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:08:43,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 16:08:43,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:43,896 INFO L225 Difference]: With dead ends: 874 [2022-11-16 16:08:43,897 INFO L226 Difference]: Without dead ends: 874 [2022-11-16 16:08:43,899 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 [2022-11-16 16:08:43,901 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:43,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 8 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:08:43,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-11-16 16:08:43,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 874. [2022-11-16 16:08:43,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.5005727376861397) internal successors, (3056), 873 states have internal predecessors, (3056), 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) [2022-11-16 16:08:43,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 3056 transitions. [2022-11-16 16:08:43,986 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 3056 transitions. Word has length 11 [2022-11-16 16:08:43,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:43,987 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 3056 transitions. [2022-11-16 16:08:43,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:08:43,988 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 3056 transitions. [2022-11-16 16:08:43,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:08:43,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:43,994 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:43,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 16:08:43,995 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 16:08:43,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:43,997 INFO L85 PathProgramCache]: Analyzing trace with hash -2126430789, now seen corresponding path program 1 times [2022-11-16 16:08:44,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:44,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246507562] [2022-11-16 16:08:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:44,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:44,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:44,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246507562] [2022-11-16 16:08:44,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246507562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:08:44,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:08:44,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:08:44,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103943490] [2022-11-16 16:08:44,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:08:44,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:08:44,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:44,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:08:44,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:08:44,310 INFO L87 Difference]: Start difference. First operand 874 states and 3056 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:08:44,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:44,495 INFO L93 Difference]: Finished difference Result 1357 states and 4653 transitions. [2022-11-16 16:08:44,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 16:08:44,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 16:08:44,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:44,507 INFO L225 Difference]: With dead ends: 1357 [2022-11-16 16:08:44,507 INFO L226 Difference]: Without dead ends: 1195 [2022-11-16 16:08:44,508 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 [2022-11-16 16:08:44,511 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 44 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:44,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 17 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:08:44,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-11-16 16:08:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1195. [2022-11-16 16:08:44,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 3.4522613065326633) internal successors, (4122), 1194 states have internal predecessors, (4122), 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) [2022-11-16 16:08:44,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 4122 transitions. [2022-11-16 16:08:44,583 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 4122 transitions. Word has length 11 [2022-11-16 16:08:44,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:44,583 INFO L495 AbstractCegarLoop]: Abstraction has 1195 states and 4122 transitions. [2022-11-16 16:08:44,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:08:44,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 4122 transitions. [2022-11-16 16:08:44,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:08:44,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:44,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:44,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 16:08:44,588 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 16:08:44,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:44,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1493726594, now seen corresponding path program 1 times [2022-11-16 16:08:44,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:44,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169825862] [2022-11-16 16:08:44,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:44,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:44,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:44,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169825862] [2022-11-16 16:08:44,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169825862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:08:44,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:08:44,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:08:44,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119571746] [2022-11-16 16:08:44,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:08:44,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:08:44,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:44,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:08:44,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:08:44,898 INFO L87 Difference]: Start difference. First operand 1195 states and 4122 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:08:45,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:45,034 INFO L93 Difference]: Finished difference Result 1354 states and 4510 transitions. [2022-11-16 16:08:45,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:08:45,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 16:08:45,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:45,040 INFO L225 Difference]: With dead ends: 1354 [2022-11-16 16:08:45,040 INFO L226 Difference]: Without dead ends: 526 [2022-11-16 16:08:45,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:08:45,043 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 46 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:45,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 14 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:08:45,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-11-16 16:08:45,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2022-11-16 16:08:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 3.184761904761905) internal successors, (1672), 525 states have internal predecessors, (1672), 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) [2022-11-16 16:08:45,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1672 transitions. [2022-11-16 16:08:45,071 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1672 transitions. Word has length 12 [2022-11-16 16:08:45,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:45,073 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 1672 transitions. [2022-11-16 16:08:45,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:08:45,074 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1672 transitions. [2022-11-16 16:08:45,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:08:45,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:45,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:45,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 16:08:45,080 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 16:08:45,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:45,086 INFO L85 PathProgramCache]: Analyzing trace with hash 886194622, now seen corresponding path program 1 times [2022-11-16 16:08:45,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:45,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001498812] [2022-11-16 16:08:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:45,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:45,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:45,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001498812] [2022-11-16 16:08:45,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001498812] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:08:45,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:08:45,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:08:45,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686532868] [2022-11-16 16:08:45,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:08:45,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:08:45,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:45,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:08:45,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:08:45,292 INFO L87 Difference]: Start difference. First operand 526 states and 1672 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-16 16:08:45,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:45,383 INFO L93 Difference]: Finished difference Result 622 states and 1912 transitions. [2022-11-16 16:08:45,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:08:45,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-11-16 16:08:45,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:45,386 INFO L225 Difference]: With dead ends: 622 [2022-11-16 16:08:45,386 INFO L226 Difference]: Without dead ends: 238 [2022-11-16 16:08:45,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:08:45,387 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 61 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:45,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 10 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:08:45,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-16 16:08:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2022-11-16 16:08:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.919831223628692) internal successors, (692), 237 states have internal predecessors, (692), 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) [2022-11-16 16:08:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 692 transitions. [2022-11-16 16:08:45,400 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 692 transitions. Word has length 13 [2022-11-16 16:08:45,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:45,400 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 692 transitions. [2022-11-16 16:08:45,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-16 16:08:45,401 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 692 transitions. [2022-11-16 16:08:45,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:08:45,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:45,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:45,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 16:08:45,403 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 16:08:45,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:45,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1641167671, now seen corresponding path program 1 times [2022-11-16 16:08:45,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:45,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008481739] [2022-11-16 16:08:45,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:45,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:45,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:45,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:45,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008481739] [2022-11-16 16:08:45,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008481739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:08:45,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:08:45,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:08:45,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883374016] [2022-11-16 16:08:45,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:08:45,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:08:45,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:45,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:08:45,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:08:45,589 INFO L87 Difference]: Start difference. First operand 238 states and 692 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-11-16 16:08:45,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:45,677 INFO L93 Difference]: Finished difference Result 226 states and 648 transitions. [2022-11-16 16:08:45,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:08:45,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:08:45,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:45,680 INFO L225 Difference]: With dead ends: 226 [2022-11-16 16:08:45,681 INFO L226 Difference]: Without dead ends: 226 [2022-11-16 16:08:45,681 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 [2022-11-16 16:08:45,682 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:45,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 12 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:08:45,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-16 16:08:45,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2022-11-16 16:08:45,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.88) internal successors, (648), 225 states have internal predecessors, (648), 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) [2022-11-16 16:08:45,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 648 transitions. [2022-11-16 16:08:45,693 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 648 transitions. Word has length 15 [2022-11-16 16:08:45,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:45,694 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 648 transitions. [2022-11-16 16:08:45,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-11-16 16:08:45,695 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 648 transitions. [2022-11-16 16:08:45,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 16:08:45,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:45,696 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:45,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 16:08:45,697 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 16:08:45,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:45,697 INFO L85 PathProgramCache]: Analyzing trace with hash -787845515, now seen corresponding path program 1 times [2022-11-16 16:08:45,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:45,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629976435] [2022-11-16 16:08:45,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:45,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:45,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:45,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629976435] [2022-11-16 16:08:45,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629976435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:08:45,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:08:45,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:08:45,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495667023] [2022-11-16 16:08:45,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:08:45,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:08:45,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:45,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:08:45,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:08:45,883 INFO L87 Difference]: Start difference. First operand 226 states and 648 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-16 16:08:45,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:45,945 INFO L93 Difference]: Finished difference Result 262 states and 732 transitions. [2022-11-16 16:08:45,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:08:45,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 [2022-11-16 16:08:45,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:45,948 INFO L225 Difference]: With dead ends: 262 [2022-11-16 16:08:45,948 INFO L226 Difference]: Without dead ends: 124 [2022-11-16 16:08:45,948 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 [2022-11-16 16:08:45,949 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 28 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:45,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 6 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:08:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-16 16:08:45,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-11-16 16:08:45,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.6178861788617884) internal successors, (322), 123 states have internal predecessors, (322), 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) [2022-11-16 16:08:45,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 322 transitions. [2022-11-16 16:08:45,956 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 322 transitions. Word has length 16 [2022-11-16 16:08:45,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:45,957 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 322 transitions. [2022-11-16 16:08:45,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-16 16:08:45,957 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 322 transitions. [2022-11-16 16:08:45,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 16:08:45,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:08:45,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:45,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 16:08:45,959 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 16:08:45,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:08:45,959 INFO L85 PathProgramCache]: Analyzing trace with hash -909234725, now seen corresponding path program 1 times [2022-11-16 16:08:45,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:08:45,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680180430] [2022-11-16 16:08:45,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:08:45,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:08:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:08:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:08:46,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:08:46,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680180430] [2022-11-16 16:08:46,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680180430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:08:46,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:08:46,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 16:08:46,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089386230] [2022-11-16 16:08:46,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:08:46,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:08:46,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:08:46,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:08:46,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:08:46,169 INFO L87 Difference]: Start difference. First operand 124 states and 322 transitions. Second operand has 5 states, 4 states have (on average 4.25) 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) [2022-11-16 16:08:46,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:08:46,223 INFO L93 Difference]: Finished difference Result 100 states and 246 transitions. [2022-11-16 16:08:46,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:08:46,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) 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 [2022-11-16 16:08:46,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:08:46,226 INFO L225 Difference]: With dead ends: 100 [2022-11-16 16:08:46,226 INFO L226 Difference]: Without dead ends: 0 [2022-11-16 16:08:46,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:08:46,229 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:08:46,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 4 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:08:46,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-16 16:08:46,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-16 16:08:46,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2022-11-16 16:08:46,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-16 16:08:46,232 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2022-11-16 16:08:46,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:08:46,232 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 16:08:46,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) 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) [2022-11-16 16:08:46,233 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-16 16:08:46,233 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-16 16:08:46,236 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2022-11-16 16:08:46,237 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 5 remaining) [2022-11-16 16:08:46,237 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-11-16 16:08:46,238 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2022-11-16 16:08:46,238 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2022-11-16 16:08:46,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 16:08:46,241 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:08:46,248 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-16 16:08:46,249 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 16:08:46,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 04:08:46 BasicIcfg [2022-11-16 16:08:46,256 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 16:08:46,257 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 16:08:46,257 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 16:08:46,257 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 16:08:46,258 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:08:36" (3/4) ... [2022-11-16 16:08:46,262 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-16 16:08:46,270 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2022-11-16 16:08:46,270 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2022-11-16 16:08:46,270 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2022-11-16 16:08:46,271 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P3 [2022-11-16 16:08:46,278 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2022-11-16 16:08:46,279 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-16 16:08:46,279 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-16 16:08:46,279 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-16 16:08:46,320 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc57dae-8cc8-46ad-999c-14ce570e6b0b/bin/utaipan-Xvt2sAort0/witness.graphml [2022-11-16 16:08:46,320 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 16:08:46,321 INFO L158 Benchmark]: Toolchain (without parser) took 11080.49ms. Allocated memory was 111.1MB in the beginning and 169.9MB in the end (delta: 58.7MB). Free memory was 75.8MB in the beginning and 62.9MB in the end (delta: 13.0MB). Peak memory consumption was 70.8MB. Max. memory is 16.1GB. [2022-11-16 16:08:46,322 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 111.1MB. Free memory was 62.2MB in the beginning and 62.1MB in the end (delta: 63.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 16:08:46,322 INFO L158 Benchmark]: CACSL2BoogieTranslator took 789.04ms. Allocated memory is still 111.1MB. Free memory was 75.6MB in the beginning and 75.5MB in the end (delta: 174.8kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 16:08:46,322 INFO L158 Benchmark]: Boogie Procedure Inliner took 86.38ms. Allocated memory is still 111.1MB. Free memory was 75.5MB in the beginning and 73.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 16:08:46,323 INFO L158 Benchmark]: Boogie Preprocessor took 64.46ms. Allocated memory is still 111.1MB. Free memory was 73.4MB in the beginning and 71.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 16:08:46,323 INFO L158 Benchmark]: RCFGBuilder took 656.29ms. Allocated memory is still 111.1MB. Free memory was 71.7MB in the beginning and 57.5MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-16 16:08:46,323 INFO L158 Benchmark]: TraceAbstraction took 9401.50ms. Allocated memory was 111.1MB in the beginning and 169.9MB in the end (delta: 58.7MB). Free memory was 56.7MB in the beginning and 66.0MB in the end (delta: -9.3MB). Peak memory consumption was 52.3MB. Max. memory is 16.1GB. [2022-11-16 16:08:46,324 INFO L158 Benchmark]: Witness Printer took 63.93ms. Allocated memory is still 169.9MB. Free memory was 66.0MB in the beginning and 62.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 16:08:46,326 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 111.1MB. Free memory was 62.2MB in the beginning and 62.1MB in the end (delta: 63.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 789.04ms. Allocated memory is still 111.1MB. Free memory was 75.6MB in the beginning and 75.5MB in the end (delta: 174.8kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 86.38ms. Allocated memory is still 111.1MB. Free memory was 75.5MB in the beginning and 73.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 64.46ms. Allocated memory is still 111.1MB. Free memory was 73.4MB in the beginning and 71.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 656.29ms. Allocated memory is still 111.1MB. Free memory was 71.7MB in the beginning and 57.5MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 9401.50ms. Allocated memory was 111.1MB in the beginning and 169.9MB in the end (delta: 58.7MB). Free memory was 56.7MB in the beginning and 66.0MB in the end (delta: -9.3MB). Peak memory consumption was 52.3MB. Max. memory is 16.1GB. * Witness Printer took 63.93ms. Allocated memory is still 169.9MB. Free memory was 66.0MB in the beginning and 62.9MB in the end (delta: 3.1MB). 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: 4.9s, 122 PlacesBefore, 40 PlacesAfterwards, 111 TransitionsBefore, 27 TransitionsAfterwards, 2568 CoEnabledTransitionPairs, 6 FixpointIterations, 26 TrivialSequentialCompositions, 58 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 2 ChoiceCompositions, 94 TotalNumberOfCompositions, 5171 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3107, independent: 2975, independent conditional: 0, independent unconditional: 2975, dependent: 132, dependent conditional: 0, dependent unconditional: 132, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1904, independent: 1843, independent conditional: 0, independent unconditional: 1843, dependent: 61, dependent conditional: 0, dependent unconditional: 61, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1904, independent: 1823, independent conditional: 0, independent unconditional: 1823, dependent: 81, dependent conditional: 0, dependent unconditional: 81, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 81, independent: 20, independent conditional: 0, independent unconditional: 20, dependent: 61, dependent conditional: 0, dependent unconditional: 61, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 310, independent: 82, independent conditional: 0, independent unconditional: 82, dependent: 228, dependent conditional: 0, dependent unconditional: 228, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3107, independent: 1132, independent conditional: 0, independent unconditional: 1132, dependent: 71, dependent conditional: 0, dependent unconditional: 71, unknown: 1904, unknown conditional: 0, unknown unconditional: 1904] , Statistics on independence cache: Total cache size (in pairs): 142, Positive cache size: 125, Positive conditional cache size: 0, Positive unconditional cache size: 125, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, 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 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 142 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 9.1s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 270 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 270 mSDsluCounter, 79 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 44 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 327 IncrementalHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 35 mSDtfsCounter, 327 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1195occurred in iteration=3, InterpolantAutomatonStates: 30, 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, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 105 NumberOfCodeBlocks, 105 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 97 ConstructedInterpolants, 0 QuantifiedInterpolants, 683 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-16 16:08:46,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cc57dae-8cc8-46ad-999c-14ce570e6b0b/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE